Septic in East Aurora, NY
Last updated: Mar 21, 2026
If you've strolled down East Aurora's tree-lined streets or pulled into a home on a quiet cul-de-sac, you've felt the area's practical mix of village charm and rural practicality. Many East Aurora homes rely on private septic systems, tucked inconspicuously in backyards or tucked beneath gravel driveways, quietly doing their job so families can swim in their pools, plant gardens, and host gatherings without a second thought about wastewater.
Is septic common in East Aurora?
- Yes. In East Aurora, septic systems are a familiar part of home ownership, especially in areas outside the municipal sewer lines and in older neighborhoods where centralized sewer expansion hasn't reached every block yet.
- If you're buying a home here, you should plan for the possibility of a septic system unless the property is connected to town sewer. It's worth confirming with the seller and checking public records.
- To verify, look for signs of a septic system in the yard (a lid, access risers, or a cleanout) and ask for past inspection or maintenance records.
Should I expect septic if I own or buy a home?
- Expect septic if the property isn't on a sewer connection. Even within East Aurora's more developed pockets, not every street is tied into a centralized system.
- Ask your real estate agent or the village/town office for sewer district maps and septic permits. These records can save you surprises after purchase.
- If you already own a home here, budgeting for periodic inspections and pump-outs is part of responsible ownership, just like maintaining your roof or furnace.
Why homes typically use septic systems in East Aurora
- Geography and development patterns. Much of East Aurora grew in ways where centralized sewer didn't extend to every street early on, making on-site treatment a practical choice.
- Cost and practicality. Private septic systems are often more economical for smaller lots or properties that aren't within a convenient sewer corridor.
- Property heritage and flexibility. A septic system can offer homeowners flexibility in site use—gardens, outbuildings, or future expansions—without the constraints of an underground sewer main.
A high-level look at how a septic system works
- A septic tank sits underground to separate solids from liquids; solids settle to the bottom, liquids flow to a drain field, and soil microbes help treat the wastewater.
- Proper sizing, drainage, and regular maintenance (pumping, inspections) keep the system working and protect your home and the landscape.
- Routine care—conscious water use, keeping chemicals and non-biodegradables out of drains, and timely pumping—extends the life of the system and helps prevent backups.
This quick overview gives you a practical starting point, grounded in local realities and straightforward maintenance.
Where Septic Systems Are Common in East Aurora
In East Aurora, septic systems are most common in areas that aren't connected to municipal sewer lines. The village center generally has sewer service, but many homes outside the core—especially in the Town of Aurora's outlying parcels and older subdivisions—rely on private septic systems. This pattern reflects how the area developed, the layout of sewer mains, and the soils that blanket the region.
Areas outside sewer service
- Outer neighborhoods and rural parcels around the village core.
- Homes built before sewer extensions reached their streets or lots too far from mains.
- Properties with lots large enough to accommodate a septic system and a designated drainfield.
Soil and site suitability factors
- Soils with good drainage (loam or sandy loam) support reliable septic performance when properly designed.
- Seasonal high water table or proximity to wetlands may require alternative designs (e.g., mound systems) or closer coordination with local health departments.
- Gentle slopes and adequate setback from wells, streams, and property lines influence how readily a septic system can be placed and maintained.
Development history and infrastructure
- East Aurora's development includes both sewered and non-sewered areas. Older portions of the town and surrounding countryside often relied on septic before sewer lines were expanded.
- When sewer service becomes available in a district, local rules and timelines for connecting vary. Some municipalities require connection within a defined period once mains are extended, while others offer phased options or incentives. Always verify current requirements with local authorities before planning upgrades.
How to verify for your property
- Confirm sewer availability and your property's sewer district status with the local building or planning department.
- Check soil conditions and lot size to gauge septic feasibility for future maintenance or replacement.
- If you're buying a home, obtain the existing septic permit and maintenance history; have a qualified inspector assess system condition.
- Review state guidance on onsite wastewater to understand design, operation, and maintenance best practices.
Land-use patterns that impact septic prevalence
- Residential zones with larger lots that predate dense sewer networks.
- Areas with soil profiles that historically performed well with conventional systems, making septic a practical choice for single-family homes.
- Regions where septic tank pumping, annual inspections, and regular maintenance are essential to protect groundwater and nearby wells.
Quick references for official guidance
- New York State Department of Health — Onsite Wastewater (Septic) Systems:
- U.S. Environmental Protection Agency — Septic Systems:
Septic vs Sewer: What Homeowners in East Aurora Should Know
How septic systems and municipal sewers differ
- Septic system: An on-site solution. A septic tank collects and begins to break down waste, while the leach field treats it underground on your property. You're responsible for maintenance, inspections, and repairs.
- Municipal sewer: A centralized system. Wastewater is carried away by a network of pipes to a treatment plant, with maintenance handled by the local sewer district. You typically pay a monthly or quarterly sewer bill and don't handle tank maintenance.
In East Aurora, homes may sit in a sewer service area or rely on a private septic system. Availability depends on local infrastructure and service expansion, so confirm with your village or the local health department before planning any changes.
Why this matters for you
- Costs: Septic system ownership includes pumping, tank inspections, and occasional repairs. Sewer service charges are predictable monthly bills, with no on-site tank maintenance.
- Property impact: If you plan to add bedrooms, build a new addition, or update plumbing, your wastewater options may change. Converting from septic to sewer can involve trenching, connection fees, and potential lot or setback requirements.
- Environment and safety: A well-maintained septic system protects groundwater and nearby streams. A failing system can contaminate drinking water wells or the local ecosystem.
Costs and maintenance at a glance
- Septic on-site:
- Pump every 3–5 years (more often in sandy or clay soils, or with high daily wastewater volumes).
- Schedule regular inspections to catch cracks, effluent leaks, or drainage issues early.
- Use water wisely and avoid flushing non-dissolvable items, oils, or harsh chemicals.
- Sewer connection:
- One-time connection costs and possible street or curb repairs.
- Ongoing sewer charges based on usage; no private tank pumping.
- Fewer maintenance tasks on your end, but follow the district's rules for disposal of fats, oils, and grease.
Practical steps to evaluate your best option
- Determine your current status
- Check your property records or ask the Village of East Aurora/your sewer district to confirm whether you're connected to municipal sewer.
- If you're on septic, locate the tank access lids and determine tank size and last pumping date.
- Compare up-front and long-term costs
- Get quotes for connecting to sewer, including any street work, permits, or impact fees.
- Compare with estimated septic pumping, maintenance, and repair costs over 10–20 years.
- Assess site conditions and future plans
- Soil tests, lot size, and drainage influence septic longevity.
- Planned expansions (additional bedrooms, living space) may affect wastewater load and the feasibility of keeping septic.
- Review environmental and code requirements
- Local health or building departments have rules for septic setbacks, drainage field location, and permissible modifications.
- If you're near wells, wetlands, or a protected area, stricter rules may apply.
- Make an informed decision
- Consider not only the immediate cost but also reliability, service interruptions, and long-term property value.
- Consult qualified professionals for a site evaluation, septic system inspection, or sewer feasibility study.
Quick upkeep reminders
- Have your septic inspected every 1–2 years if you're actively using it, and pump every 3–5 years.
- Keep drainage away from the drainfield; divert surface runoff and roof water away from the area.
- Use septic-friendly products and minimize chemical cleaners.
Useful Resources
Typical Septic System Types in East Aurora
Conventional gravity septic system
- How it works: Wastewater flows by gravity from the house into a septic tank, where solids settle. Liquid effluent then drains through a soil absorption field (drainfield) with perforated lines or a trench bed into the ground.
- When it fits East Aurora soils: Common where there is enough soil depth and good percolation to allow a drainfield to filter effluent.
- Pros: Simple design, straightforward maintenance, usually the lowest upfront cost.
- Cons: Requires solid soil conditions; groundwater, clay, or dense roots can limit effectiveness; regular pumping is still essential.
- Maintenance basics:
- Schedule tank pumping every 3–5 years (or per your pro's recommendation).
- Conserve water to avoid overloading the system.
- Protect the drainfield from compaction, parking, or heavy equipment.
- Have a licensed professional inspect baffles and tank condition during service.
- Learn more:
Pressure distribution (low-pressure dose) system
- How it works: A small pump deposits wastewater under low pressure to multiple distribution laterals in the drainfield, helping even out dosing when soils vary across the site.
- When it fits East Aurora soils: Helpful when native soil is uneven or has limited infiltration in parts of the drainfield.
- Pros: More uniform dispersion; can use narrower trenches, reducing disturbance on site.
- Cons: Requires reliable power and a pump; ongoing maintenance and monitoring of the dosing system.
- Maintenance basics:
- Have the pump and controls serviced regularly.
- Check for alarms and ensure the control panel is clean and accessible.
- Keep drainfield area free of roots and heavy loads.
- Learn more:
Mound system
- How it works: A designated raised "mound" of sand fill above native soil houses the drainfield; effluent is pumped into the mound where it infiltrates downward through the sand.
- When it fits East Aurora soils: Used when seasonal high groundwater, shallow bedrock, or poor native soils prevent a conventional drainfield.
- Pros: Expands usable lot space and allows treatment where native soil is unsuitable.
- Cons: Higher installation cost and more complex maintenance; requires longer operational life and monitoring.
- Maintenance basics:
- Periodic inspections of the mound and surface cover.
- Avoid compaction on or near the mound; maintain vegetation.
- Schedule professional servicing as recommended by the installer.
- Learn more:
Sand filter system
- How it works: Pre-treated effluent passes through a sand filtration bed before reaching the drainfield, providing an extra layer of treatment.
- When it fits East Aurora soils: Helpful in marginal soils where conventional filtration would be slower or less reliable.
- Pros: Higher treatment efficiency in challenging soils; can support smaller or more compact drainfields.
- Cons: Requires regular maintenance of the filter media and occasional replacement of sand/fill.
- Maintenance basics:
- Have the filter inspected and cleaned as needed.
- Monitor for signs of clogging or reduced flow.
- Schedule professional service for media replacement when indicated.
- Learn more:
Aerobic Treatment Unit (ATU)
- How it works: An aerobic (oxygen-using) unit pre-treats wastewater, producing higher-quality effluent before it moves to the drainfield, often with a disinfection step.
- When it fits East Aurora soils: Useful where soils are limited or the drainfield space is tight; can reduce the size of the required drainfield.
- Pros: Better effluent quality; can allow more compact or alternative drainfields.
- Cons: Higher energy use, more frequent service, and potential alarms/crashes that require attention.
- Maintenance basics:
- Regular professional service (often every 1–3 months, depending on the unit).
- Keep cleaners and chemicals out of the system to protect the biology.
- Promptly address alarms or unusual odors.
- Learn more:
Chamber drainfield systems
- How it works: Replaces gravel and trench fill with prefabricated plastic or composite chambers that allow greater infiltration area.
- Pros: Faster installation and easier trenching; good load distribution and infiltration.
- Cons: Can have higher upfront costs; performance still depends on soil conditions.
- Maintenance basics:
- Inspect for cracks or settling around chambers.
- Avoid heavy traffic over chambers.
- Have a pro evaluate the system during routine pumping.
- Learn more:
Common Septic Issues in East Aurora
High groundwater and seasonal saturation
In East Aurora, spring snowmelt and heavy rainfall can raise the local water table and saturate soils around the drain field. When soils are flooded or slow to drain, effluent has nowhere to go and system performance drops.
- Symptoms: soggy leach field, surface seepage, gurgling toilets, slow drainage.
- Why it can be unique here: older lots, varying soil types, and seasonal moisture swings common in Western New York can push otherwise healthy systems toward failure.
- What you can do (step-by-step):
- Conserve water during wet periods to reduce load on the system.
- Keep roof drains, sump pumps, and outdoor washing away from the drain field.
- Have a septic pro evaluate field permeability and consider extending pumping intervals or upgrading to a higher-capacity system if needed.
Resources: EPA septic basics for water and soil interactions; NYSDOH guidance on onsite wastewater treatment systems.
Aging systems and capacity in established East Aurora homes
Many East Aurora homes were built decades ago with older septic designs and components that wear out or become undersized for modern water use.
- Symptoms: frequent pumping, backups during heavy use, unusual odors near the drain field.
- Why it can be unique here: long-term use without timely maintenance, occasional expansion of home occupancy or amenities (garbage disposals, large baths) without system upgrades.
- What you can do (step-by-step):
- Establish a maintenance plan with a licensed septic professional; typical pumping every 2–3 years, more often with high water usage.
- Have tank and baffle integrity checked; replace damaged components to restore proper flow.
- If repairs aren't enough, assess whether the system size matches current household demand and consider an upgrade or redesign.
Resources: EPA homeowner septic care pages; NYSDOH onsite wastewater resources.
Tree roots and landscape intrusion
East Aurora's mature trees, gardens, and landscaping can send roots toward drain lines, causing blockages or breaks.
- Symptoms: slow drains, sewage smells away from the house, damp patches near the drain field.
- Why it can be unique here: robust root networks in established yards intersecting with shallow or aging lines.
- What you can do (step-by-step):
- Have lines inspected with a camera to locate root intrusion.
- Prune or route root growth away from access points; install root barriers if feasible.
- Schedule regular maintenance to prevent minor intrusions from becoming major failures.
Resources: EPA septic care tips; NYSDOH onsite systems guidance.
Surface water, runoff, and drainage challenges
Improper grading and surface runoff toward the drain field can flood and saturate the leach field, especially on sloped lots or near driveways.
- Symptoms: standing water over drain field after rain, soil odors, slow toilets.
- Why it can be unique here: local properties may have slopes or impervious areas that direct water toward the septic system.
- What you can do (step-by-step):
- Re-grade around the drain field to promote outward drainage away from the system.
- Create swales or rain gardens to capture and treat runoff before it reaches the drain field.
- Direct downspouts and surface water away from the septic area; avoid using the drain field as a lawn irrigation zone.
Resources: EPA wastewater management resources; NYSDOH onsite wastewater materials.
Freeze-thaw and winter damage
Cold winters and freeze–thaw cycles affect soils and buried components, slowing absorption and stressing pipes.
- Symptoms: intermittent backups, cracked lids or access ports, frost heave visible on the surface.
- Why it can be unique here: Western New York's winter climate repeatedly stresses septic components.
- What you can do (step-by-step):
- Protect access lids and keep the area around the tank clear of snow and ice to permit inspection.
- Avoid parking or heavy equipment over the tank or drain field during winter.
- Schedule seasonal checks in late fall to prepare for winter conditions.
Resources: EPA septic systems overview; NYSDOH onsite wastewater maintenance tips.
Maintenance gaps and improper use
Using the system as a refuse bin or flushing additives can disrupt beneficial bacteria and clog the drain field.
- Symptoms: slower drainage, odors, more frequent pumping.
- Why it can be unique here: homeowners may rely on disposals or cleaners not compatible with septic biology.
- What you can do (step-by-step):
- Use septic-safe products and limit garbage disposal usage.
- Schedule regular professional maintenance and avoid DIY fixes that add solids.
- Use enzyme-based or bacteria-friendly treatments only as recommended by your pro.
Resources: EPA septic care guidelines; NYSDOH onsite wastewater best practices.
Official resources:
- EPA Septic Systems:
- Erie County Department of Health:
Septic Inspection, Permits & Local Oversight
What a septic inspection covers in East Aurora
- A typical inspection determines if the onsite wastewater treatment system (OWTS) is functioning safely and in compliance with state and local rules.
- The inspector will assess: tank access lids, tank integrity and scum/bottom sludge levels, distribution box and piping, drain field condition, mound or reserve areas, and evidence of surface discharge or sewage odors.
- They'll review maintenance history, pump schedules, and any prior repairs or component replacements.
- Proximity to wells, streams, driveways, and foundation lines is checked to prevent contamination or damage.
- Look for signs of illicit connections, improper hookups, or bypassed components.
- The goal is to verify there's adequate system capacity for current use and to flag issues that could require repair, redesign, or replacement.
Permits you may encounter
- OWTS installation permit: Required for new systems or complete replacements, including changes to design, placement, or capacity.
- OWTS repair or redesign permit: Needed when major repairs or system redesigns are planned, or when changing land use that affects loading.
- Connection permit if your property will tie into a municipal sewer (if available in your area).
- Ongoing maintenance notices or transfer-related inspections might be requested during a real estate transaction.
- Note: Routine pumping or maintenance visits typically do not require a new permit, but records should be kept and may be requested during inspections.
Who oversees approvals and where to start
- State oversight: New York State Department of Health (NYSDOH) administers statewide requirements for onsite wastewater systems. See the Onsite Wastewater Treatment Systems program for guidance and forms. Official resource:
- County oversight: Erie County Department of Health handles many OWTS-related permits and inspections within its jurisdiction. Official resource:
- Local jurisdiction: East Aurora village/town authorities may have additional local code requirements or filing steps. Start by confirming with the Erie County DOH and your local government office (Village of East Aurora or Town of Aurora) to determine any town-specific forms, fees, and inspection schedules.
- If you're unsure who has authority for your address, begin with NYSDOH and Erie County DOH contacts, then follow any directions they provide to the appropriate local office.
How to start the process
- Confirm jurisdiction for your property: address-based determinations will point to NYSDOH/Erie County DOH and your local village/town office.
- Contact the Erie County Department of Health to verify required permits and the preferred process for inspection and approval. Have your parcel number, current use, and any existing system drawings handy.
- Hire a qualified OWTS professional to conduct the inspection, prepare any design or repair plans, and coordinate with the permitting office.
- Gather documentation: property deed, tax parcel map, any previous OWTS permits or as-built drawings, maintenance records, and a list of recent pumping or repairs.
- Submit permit applications and schedule inspections as directed by the health department. Keep copies of all approvals and inspection reports.
Resources
Note: Always verify with your local East Aurora (Village of East Aurora or Town of Aurora) officials for any town-specific forms, fees, or additional requirements that accompany state and county rules. Local pages and contacts can typically be found through the village or town government portals or by calling the county health department.
Septic Maintenance for Homes in East Aurora
East Aurora-specific context
East Aurora sits among clay and loamy soils with cold winters and pronounced seasonal shifts. Many older homes in the area rely on private septic systems, so keeping the system well-maintained is especially important when the ground freezes, when snowmelt overwhelming the drainage can occur in spring, or when tree roots have had decades to grow through the yard. In East Aurora, improper disposal, heavy winter usage, and aging tanks can contribute to backups or surface wet spots in the drain field. Regular care becomes a practical, money-saving habit for homes that aren't connected to public sewers.
Regular pumping and inspections
- Schedule pumping every 3–5 years as a baseline. Frequency depends on tank size, household size, and water usage (garbage disposals, baths, laundry). Most homes have 1,000–1,500 gallon tanks; larger families may need more frequent servicing.
- Have a licensed septic pumper inspect the tank's baffles, inlet/outlet pipes, and the sludge/scum depths during pumping.
- Keep detailed records: dates of pumping, tank size, and any observations from inspections. This helps you plan future maintenance and supports local regulatory requirements.
- Consider a professional camera inspection of the pipes if you notice slow drains or backups. Early detection of cracks or root intrusion saves headaches later.
Drainfield protection
- Protect the drain field from damage: never drive or park over it, and avoid heavy equipment on the area. Keep the zone free of fertilizers, pesticides, and yard waste.
- Plant only shallow-rooted vegetation above the drain field. Deep-rooted trees and shrubs can intrude into piping and reduce absorption.
- Use water-saving fixtures and spread out laundry loads to reduce peak stress on the system. A typical household can lower strain by staggering heavy water use and fixing leaks promptly.
Seasonal care in East Aurora
- Winter: freeze risk can slow absorption. Use hot water for cleaning, fix leaks promptly, and redirect snow away from the drain field so it doesn't melt directly onto the soils surrounding the system.
- Spring after thaw: look for soggy patches, particularly near the drain field, and avoid disturbing soils there. If you see standing water or strong odors, call a septic professional promptly.
- Summer droughts: low soil moisture can hinder drainage. Maintain steady water use and avoid irrigating near the leach field.
Signs of trouble and what to do
- Common red flags: slow drains, gurgling sounds in toilet pipes, persistent odors, lush green grass patches over the drain field, or surface wet spots.
- If you notice any signs:
- Conserve water immediately (less laundry, shorter showers).
- Limit use of the system and avoid flushing nonbiodegradable items.
- Contact a licensed septic professional for a diagnosis and pumping if needed.
- If you suspect contamination to wells or surface water, contact local health authorities promptly.
Local regulations and resources
- Keep maintenance records and stay compliant with local health department guidance. If you're unsure of permit requirements, contact the Erie County Health Department for onsite wastewater guidance as it applies to East Aurora residences.
- Official resources:
- EPA Septic Systems: how they work and maintenance basics.
Cost Expectations for Septic Services in East Aurora
Septic Tank Pumping and Cleaning
Regular pumping removes sludge and scum, protecting the drain field. In East Aurora, frequency depends on tank size (typical homes use 1,000–1,250 gallons) and daily water use. Older East Aurora homes with smaller tanks or larger families may need pumping every 2–3 years; smaller households with moderate use may stretch to 3–5 years. A licensed pro will also inspect baffles, lids, and access ports during service.
What's included:
- Pumping of liquids, sludge, and scum
- Visual inspection of tank baffles, inlet/outlet pipes, and lid condition
- Status notes on access risers and safe waste disposal
- Brief system health recommendations for next steps
East Aurora specifics:
- Clay soils, winter frost, and seasonal wetness can stress the drain field; pumping on schedule helps reduce risk.
- Some East Aurora homes rely on mound or sand-filter systems, which may demand more frequent checks.
Typical cost in East Aurora: $350–$550, depending on tank size, accessibility, and any added inspections.
Official resources:
Septic System Inspections
Inspections are common during property transfers or to verify system health before major repairs. In East Aurora, inspectors may review past permits and records and decide if a dye test or pump is warranted. If the home could be connected to municipal sewer, inspectors will confirm that as part of the check.
What's included:
- Exterior tank and system components review
- Records check (permits, last pumping, and maintenance)
- Dye tests or functional checks as needed
- Recommendations and a written report
East Aurora specifics:
- Some neighborhoods are serviced by municipal sewer; in those cases, a septic inspection may be limited or inapplicable.
- Erie County or NYS health requirements may guide what tests are appropriate.
Typical cost in East Aurora: $200–$500 for a basic inspection; $400–$700 for a more thorough Level II inspection that includes additional testing or camera review.
Official resources:
Camera/Video Inspection of Lines
Video inspection helps locate cracks, root intrusion, or blockages that pumping alone can't reveal. This is especially useful in East Aurora where older clay lines and dense soils are common.
What's included:
- In-line camera crawl to assess pipes from the tank to the drain field
- Identification of roots, breaks, or sags
- Correlation with pumping results; recommended repairs or replacements
East Aurora specifics:
- Root intrusion is a frequent issue in older properties; camera checks help plan targeted cleanouts or pipe repairs.
- Congested or limited access may influence scheduling and cost.
Typical cost in East Aurora: $300–$900, depending on the length of lines and complexity.
Official resources: https://www.health.ny.gov/environmental/onsite_wastewater/
Drain Field Repair and Replacement
Drain field performance is a common concern in East Aurora due to soil conditions and space constraints. Repair can range from pipe cleanouts and shallow replacements to full drain-field reconstruction or mound systems when space is limited or soils are unsuitable.
What's included:
- Evaluation of current drain field performance (soil tests, infiltration checks)
- Repairs like trench reconfiguration, piping replacement, or valve/separator work
- Full replacement with conventional trench field or mound system (if required by site conditions)
East Aurora specifics:
- Heavy clay soils and high water tables may necessitate more extensive work or alternative designs like a mound system.
- Limited lot size can push projects toward compact or elevated designs.
Typical cost in East Aurora:
Cesspool pumping (if applicable): $300–$600
Official resources: https://www.health.ny.gov/environmental/onsite_wastewater/
New System Design and Installation
If you're building or replacing an old system, design and installation require site assessment, soil testing, and permitting. East Aurora's clay soils and groundwater considerations can influence system type and cost.
What's included:
- Site evaluation, soil tests, and percolation tests as required
- System design tailored to site conditions (conventional vs. mound or alternative)
- Permits and inspections throughout installation
East Aurora specifics:
- Soil and groundwater considerations often drive design toward elevated or mound systems.
- Local permitting may involve NYS DOH and Erie County requirements.
Typical cost in East Aurora:
- Design: $2,000–$5,000
- Conventional system install: $8,000–$20,000
- Mound or advanced systems: $25,000–$60,000
Official resources: https://www.health.ny.gov/environmental/onsite_wastewater/
Preventive Maintenance and Service Plans
Ongoing maintenance helps prevent surprises and extends system life.
What's included:
- Annual pumping reminders and inspections
- Seasonal checks of lids, risers, and fracture-prone components
- Priority scheduling for repairs
Typical cost in East Aurora: $150–$400 per year for a basic plan; higher tiers may include more frequent pumping and faster response.
Official resources: https://www.health.ny.gov/environmental/onsite_wastewater/