Septic in El Centro, CA

Welcome to El Centro, where sunshine is plentiful and practical home care is a neighborhood habit. If you've ever thought about how wastewater is handled at home, you're in good company—septic systems are a familiar part of many local properties, especially in areas a bit farther from the city core where sewer lines don't always reach.

Is septic common in El Centro? Should I expect septic if I own or buy a home?

Short answer: yes, in many parts of town a private septic system is the standard on-site solution. If your home sits inside a municipal sewer boundary and is connected to the city system, you won't have a septic tank. If you're looking at a property on the outskirts or in a rural pocket, a septic system is more likely. Always confirm the status with the seller, a trusted local septic contractor, or your city/county records.

What to check if you're buying or owning a home with septic

• Confirm sewer connection status with the City of El Centro or Imperial County records.
• Ask for the most recent septic pumping record and any service history.
• Look for accessible inspection ports, signs of drainage field issues, or odors that could signal trouble.
• Make sure there's a documented maintenance plan and budget for routine service.
• Expect typical pumping intervals of about 3–5 years for a family of four with normal usage; larger households or frequent heavy use can shorten that interval.

Why homes in El Centro typically use septic systems

• Distance from centralized sewer: many older neighborhoods and outlying areas weren't wired for city sewer when they were built, so on-site treatment made sense.
• Cost and practicality of extending lines: running sewer mains across desert terrain can be expensive and logistically complex.
• Site and soil factors: local soils and groundwater conditions require thoughtful design to ensure safe drainage and long life for the system.
• Water-use patterns: lower daily wastewater flow in desert homes, plus water-saving fixtures, can influence system size and maintenance needs.
• Independence and resale considerations: a well-maintained septic system gives a clear maintenance history and keeps operating costs predictable for many homeowners.

High-level explanation (why septic exists here)

Septics exist in El Centro because treating wastewater on-site is a practical, economical solution when centralized sewer services aren't readily available to all neighborhoods. An on-site system works with local soils and climate to manage wastewater close to where it's produced, reducing the need for long-distance infrastructure and providing reliable service for many homes.

With that context in mind, you'll be better prepared to care for your system and spot issues early as a homeowner in El Centro.

Where Septic Systems Are Common in El Centro

Typical locations around El Centro where septic systems are found

• Outlying residential neighborhoods outside the city's main sewer service boundaries. If your home sits beyond the sewer line map, odds are you're on a septic system or an alternate OWTS (onsite wastewater treatment system).
• Older subdivisions built before municipal sewer extensions. Many longtime homes in the rural fringe were connected to septic systems when city sewer wasn't available.
• Rural and agricultural parcels surrounding the city. Farms, ranch properties, and some acreage parcels often rely on septic due to distance from treatment plants.
• Some commercial and multi-family properties in areas not currently tied to a centralized sewer.

Why these areas rely on septic systems

• Extending sewer lines to remote lots can be expensive and technically challenging in desert terrain, which slows or halts connections.
• Soil conditions, slope, and groundwater patterns in certain parts of the El Centro region favor on-site treatment and leach fields over long gravity sewer extensions.
• Local service boundaries and permit processes create practical gaps where septic systems remain the practical option for buildings not immediately served by a sewer main.

How to tell if your property uses a septic system

1. Check with the local authority. Call or visit Imperial County Environmental Health or your city utilities office to confirm whether your property is connected to the municipal sewer or on an OWTS.
2. Look for telltale features. A buried septic tank lid, marker, or lack of a sewer cleanout at the street can indicate a septic system.
3. Review records. Property records, septic permits, or maintenance logs from previous owners may specify an OWTS installation date and design.
4. Ask for a formal assessment. If you're unsure, hire a licensed septic professional to perform an inspection and a system register check.

Maintenance and best practices for El Centro homes with septic

• Schedule regular pumping. Most households pump every 3–5 years, but frequency depends on tank size, household size, and system design. Start with a professional evaluation to tailor a plan.
• Protect the drainfield. Keep heavy vehicles off the area, avoid planting trees or shrubs with deep roots nearby, and don't build structures or add new landscaping directly over the field.
• Conserve water. Space out high-volume uses (laundry, dishwasher, irrigation) to reduce load on the system and extend life.
• Be mindful of what goes in the system. Only wastewater and appropriate toilet paper; avoid flushing grease, chemicals, solvents, pesticides, or food waste that can harm beneficial bacteria.
• Watch for warning signs. Wet or spongy soil, sewage odors, gurgling drains, or sewage backups in fixtures may indicate a need for inspection or repair.

Practical steps you can take now

1. Confirm your connection status with the local health department or city utilities.
2. If on septic, arrange a professional soil and tank assessment to establish pump interval and field health.
3. Create a simple maintenance plan and calendar reminders for pumping, inspections, and repairs.
4. Develop a preventative approach to protect the drainfield during landscaping or construction.

Helpful official resources

• EPA: Septic Systems page with homeowner guidance and best practices.

Septic vs Sewer: What Homeowners in El Centro Should Know

Quick comparison: septic vs sewer

• Septic system (on-site): wastewater is treated on your property in a tank and a drain field. Regular pumping is needed every 3-5 years, depending on tank size and usage. Pros: private control, no monthly sewer bill. Cons: upkeep is your responsibility; improper care can lead to backups or field failure.
• Public sewer: wastewater is sent to a municipal treatment plant. Pros: no drain field to maintain, no on-site pumping schedule, predictable monthly charges. Cons: you're tied to sewer service availability and utility rates; failures affect the broader community.

Local climate and soil considerations in El Centro

• El Centro's hot, dry climate and desert soils affect how septic systems perform. High temps and long dry spells can impact evaporation and infiltration, while soils with caliche layers or compaction can hinder drain-field performance.
• Before installing or sizing a system, expect a site evaluation (soil tests, percolation tests) from a licensed professional or local health department. This step helps determine whether a drain field can function reliably in your lot.
• If you're near developed areas with municipal sewer lines, the option to connect may be available and worth evaluating against on-site septic costs.

Should you connect or install septic? A practical decision guide

• Step 1: Check sewer service availability for your El Centro address with the City or Imperial County authorities to confirm whether public sewer access exists.
• Step 2: Compare the long-term costs: septic installation and routine pumping vs. sewer connection fees and monthly charges.
• Step 3: Consider your property layout, landscaping plans, and potential future resale impact.
• Step 4: Review local regulations and permitting requirements to understand what's needed for either option.

Maintenance essentials for septic systems in El Centro

• Schedule regular pumping every 3-5 years (adjust if you have a smaller tank or higher usage). Keep a record and align with local guidance.
• Conserve water to reduce load on the system: fix leaks promptly; install low-flow fixtures; spread heavy use (e.g., laundry) rather than bunching it in a short period.
• Flushing only human waste and septic-safe toilet paper helps protect the drain field; avoid fats, oils, grease, solvents, paints, pesticides, and harsh cleaners.
• Protect the drain field: avoid driving or placing heavy objects on it; keep within landscaped areas with shallow-rooted plants to prevent root intrusion.
• Watch for warning signs: gurgling drains, sewage odors, damp spots above the drain field, or standing water in the yard—these may indicate you need a professional inspection.

Official guidance and resources

• EPA Septic Systems:
• Imperial County Environmental Health – Septic Systems:
• California Department of Public Health – Onsite Wastewater:

Typical Septic System Types in El Centro

Conventional gravity septic systems

• Most El Centro homes use a straightforward septic tank plus a gravity-fed drain field. Wastewater moves from the tank to a buried leach field without pumps or mechanical help.
• How it works: solids settle in the tank; clarified liquid exits to perforated pipes in the drain field where it gradually percolates into the soil.
• Pros: Simple design, fewer moving parts, typically lower upfront costs.
• Cons: Needs adequate soil depth and space; performance depends on soil permeability and groundwater conditions.
• Maintenance: Regular septic tank pumping every 3–5 years (or as recommended by a pro); keep the drain field clear of heavy loads, vehicles, or landscaping that compresses soil.

Chamber systems

• Use prefabricated plastic chambers in place of gravel-filled trenches. Chambers link together to carry effluent across the drain field.
• How it works: effluent is distributed through a set of chambers that make up a shallow or standard drain field.
• Pros: Easier installation in tight lots; often lighter and faster to install than traditional gravel beds.
• Cons: Still relies on suitable soil conditions; may require more precise installation to avoid settling.
• Maintenance: Similar pumping interval to conventional systems; periodic inspection of chamber integrity and outlets.

Mound systems

• Installed where soils are shallow, percolation is poor, or groundwater is near the surface. Elevated "mounds" place the drain field above problematic soil layers.
• How it works: a trench is filled with sand or special media, then covered with topsoil and grass; effluent percolates through the mound before reaching the native soil.
• Pros: Overcomes restrictive soil conditions; allows a functional system in challenging sites.
• Cons: More space required; higher installation and maintenance complexity; requires careful landscaping and access for pump-outs.
• Maintenance: More frequent inspections; ensure there's no compaction over the mound and that surface loading is avoided.

Aerobic treatment units (ATUs)

• A step up from conventional systems, ATUs aerate wastewater to produce higher-quality effluent before it reaches the drain field.
• How it works: a small mechanical reactor and blower introduce air; treated effluent is pumped or gravity-fed to the drain field or to a spray irrigation system.
• Pros: Higher treatment efficiency; can allow alternative drain-field designs in tight or difficult soils.
• Cons: Higher upfront cost and ongoing electrical energy use; more routine maintenance and parts to service.
• Maintenance: Regular inspections, filter and pump maintenance, and battery/power checks as required by the manufacturer and local regulations.

Sand filtration or filtration beds

• Sometimes used as a secondary treatment step when soils don't adequately treat effluent, or to meet local discharge standards.
• How it works: effluent passes through a sand or media filtration layer before entering the drain field.
• Pros: Improves effluent quality and helps protect the drain field in marginal soils.
• Cons: Adds complexity and cost; requires more space and access for maintenance.
• Maintenance: Periodic media inspection and replacement as specified by the system designer.

Holding tanks

• Less common in El Centro, but seen in remote sites or where immediate connection to a drain field isn't possible.
• How it works: collects wastewater in a sealed tank for periodic pumping.
• Pros: Simple, non-leaching design; useful where soil or regulatory constraints prevent soil-based treatment.
• Cons: Requires regular hauling and pumping; no treatment on-site; odor and space considerations.
• Maintenance: Frequent pump-outs; confirm local regulations on disposal and transport.

Key site considerations for El Centro

• Soil type and depth to groundwater affect system choice.
• Desert climate means high evapotranspiration, but shallow beds can still be problematic with groundwater proximity.
• Local setbacks, permits, and inspection requirements govern what type you can install. Always confirm with the local authority before planning.

Maintenance basics (step-by-step)

1. Schedule professional inspections every year to catch issues early.
2. Pump the septic tank at intervals recommended for your system type (typically every 3–5 years for conventional, more often for ATUs).
3. Protect the drain field: avoid parking or planting deep-rooted trees/crops over it; limit irrigation in that area.
4. Watch for signs of trouble: gurgling plumbing, slow drains, sewage odors, or damp spots in the yard.

Resources

• California Department of Public Health – Onsite Wastewater Systems (OWTS):
• U.S. Environmental Protection Agency – Septic Systems: https://www.epa.gov/septic

Common Septic Issues in El Centro

Drainfield failures in the desert climate

• Symptoms: damp, lush patches over the drainfield, gurgling sounds from plumbing, toilets slow to flush or backs up during heavy use.
• Why El Centro is unique: irrigation for yards and nearby agriculture can raise the groundwater table, and caliche or hardpan soils common in the region limit drainfield percolation. A shallow water table or compact soils let effluent pool or back up, accelerating failure.
• What you can do (steps):
  1. Stop heavy water use if you notice signs of a wet drainfield.
  2. Schedule a professional assessment of soil percolation and the drainfield layout.
  3. Consider alternatives if the site can't support a conventional drainfield (mound system, enhanced treatment unit, or ET bed) and have the system redesigned by a licensed installer.
  4. Keep all traffic off the drainfield to avoid soil compaction.
• Quick tip: regular pumping of the septic tank is important, but it won't fix a failing drainfield. If you suspect failure, address it promptly with a professional.
• Resources: EPA Septic Systems — Imperial County Public Health/Environmental Health (Onsite Wastewater)

Hard water and mineral buildup

• Symptoms: buildup in pipes and fixtures, reduced effluent flow, more frequent appliance or fixture maintenance.
• Why this matters here: El Centro's hot, arid climate can coincide with mineral-rich groundwater in some areas, which contributes to scaling in pipes and tank components over time.
• What you can do (steps):
  1. Use septic-safe, non-abrasive cleaners and avoid harsh chemicals that can disrupt beneficial bacteria.
  2. Do not rely on water softeners to fix a septic issue; excessive salt can affect soil treatment. Consult a pro before changes that affect the system.
  3. Have the tank inspected for baffle integrity and indicator fittings that may be affected by mineral buildup.
  4. Schedule routine maintenance and keep records of pumping and service.
• Resources: EPA Septic Systems — https://www.epa.gov/septic; California Water Boards — Septic Tanks program https://www.waterboards.ca.gov/water_issues/programs/septic_tanks/

Overuse and improper waste disposal

• Symptoms: frequent backups, slow drains, or odors after flushing non-septic items.
• Why El Centro households face this: high outdoor water use and irrigation can stress a system; improper disposal (grease, solvents, medications, wipes, or dumping chemicals) disrupts bacterial action and can clog or damage the system.
• What you can do (steps):
  1. Run only full loads and spread out heavy water uses (like long showers) rather than blasting water into the tank all at once.
  2. Do not flush wipes, feminine products, cooking oils, fats, solvents, paints, or medications down toilets or drains.
  3. Use a septic-friendly laundry routine; consider a lint filter or lower detergent load if recommended by the installer.
  4. Have regular professional inspections to catch clogs or bacteria problems early.
• Resources: EPA Septic Systems — https://www.epa.gov/septic; California Water Boards — Septic Tanks program https://www.waterboards.ca.gov/water_issues/programs/septic_tanks/

Groundwater and nitrate considerations in an arid area

• Symptoms: occasional odors near the drainfield or shallow groundwater issues after rains; potential risk of nutrient migration toward groundwater.
• Why El Centro-specific: Imperial Valley's soils and shallow groundwater can influence how effluent disperses, and high irrigation can contribute to nutrient transport. Keeping a well-maintained system helps minimize nitrate movement into the groundwater.
• What you can do (steps):
  1. Have effluent and soil tested if you're in a sensitive groundwater area.
  2. Ensure proper dosing and dispersal in the drainfield to minimize surface infiltration.
  3. Work with a licensed septic professional to design or retroffit systems to meet site conditions.
  4. Follow local health department guidance for groundwater protection.
• Resources: EPA Septic Systems — https://www.epa.gov/septic; California Water Boards — Septic Tanks program https://www.waterboards.ca.gov/water_issues/programs/septic_tanks/;'>https://www.waterboards.ca.gov/water_issues/programs/septic_tanks/; Imperial County Public Health/Environmental Health (Onsite Wastewater) https://www.icphd.org/

Septic Inspection, Permits & Local Oversight

Local oversight in El Centro, CA

• In El Centro and the broader Imperial County, onsite wastewater systems (OWTS) are regulated at the county level with state guidance. The Imperial County Environmental Health Department typically handles permits, plan review, and field inspections. State agencies such as the California State Water Resources Control Board (SWRCB) and the California Department of Public Health (CDPH) provide overarching rules and guidance to ensure systems protect water quality.

Permits you may need

• OWTS permit for installation, modification, or replacement. This is usually issued after plan review and is required before work begins.
• Building or construction permits may be needed from the City of El Centro or Imperial County, depending on where the project sits and local jurisdiction.
• Plan review and approval are common steps before you can obtain a permit and schedule inspections.
• Ownership transfer inspections may be required in some cases when a property changes hands.

Inspection process (overview)

• Step 1: Determine which permits are required from the local Environmental Health Department (EHD) and the city/county building office.
• Step 2: Submit a complete application package, including site plans, proposed system design, soil evaluations (percolation tests may be used), and any required soil/geo reports.
• Step 3: Pay all applicable fees and wait for plan review approval.
• Step 4: After installation, schedule the field inspection with the issuing agency.
• Step 5: Receive inspection results and, if needed, follow up with corrections or additional work.

What inspectors look for during an OWTS inspection

• Proper installation of the septic tank(s), baffles, outlet tees, and access risers.
• Correct placement and grading of the absorption field (leach field) and adequate setback distances from wells, foundations, and surface water.
• Adequate venting, cleanouts, and access to components for future maintenance.
• Proper pump/altitude dosing components if the system uses a pump chamber or pressure distribution.
• No signs of surface leakage, wastewater backups, or compromised system components.
• Documentation that matches the installed system to the approved plan (as-built drawings).

How to prepare and schedule

• Gather: approved plans, septic design documents, soil reports, and any prior inspection records.
• Contact: the Imperial County Environmental Health Department or your city building department to start the process and confirm which permits apply.
• Schedule: plan review first, then the field inspection after installation is complete and ready for verification.

Timeframes and common delays

• Plan review can take a few weeks to a couple of months, depending on workload and completeness of submittals.
• Field inspections are typically scheduled within a few weeks after plan approval, though weather, holidays, or backlog can affect timing.
• If corrections are required, you'll need to address them and resubmit or re-inspect, which can add time.

Ownership transfer and ongoing maintenance

• Some transfers trigger a requirement for a system review or at least a verification that the OWTS is in good working order.
• Ongoing maintenance is essential: keep pumping records, service logs, and access points clear for future inspections or service visits.

Resources & contacts

• State guidance for OWTS:
  • California State Water Resources Control Board – Onsite Wastewater Treatment Systems:
  • California Department of Public Health – Onsite Wastewater Treatment Systems:
• Imperial County and local oversight:
  • Imperial County Environmental Health Department (OWTS information and permit processes):
  • Local building/permitting contacts for El Centro (check the City of El Centro or Imperial County websites for current offices and phone numbers)

Quick reference checklist

• Confirm if OWTS permit is required before any work.
• Prepare site plans, soil evaluations, and system design documents for review.
• Schedule plan review, then field inspection after installation.
• Bring all approvals, as-built drawings, and maintenance records to inspections.
• Ensure access to the system and a clear area around the field, with no alterations that could affect measurements.

Septic Maintenance for Homes in El Centro

Understanding El Centro's desert-climate septic challenges

• The hot, arid climate and sandy, sometimes caliche-heavy soils in El Centro can affect how quickly effluent percolates and how well a drain field works.
• Low annual rainfall means less natural flushing of the system, so daily habits matter more to avoid overload.
• Shallow bedrock or high mineral content in some soils can limit absorption. In these situations, a properly designed system or a raised/mounded field may be used by a licensed installer.
• High water-use days (summer irrigation, pool filling, and laundry) can spike inflow; plan for seasonal variation and water-saving practices.

Regular maintenance you can do

• Inspect and document: Keep a simple maintenance log for inspections, pumping, and any repairs. Check for slow drains, gurgling noises, or septic odors around the tank or drain field.
• Water-use discipline: Install high-efficiency fixtures, fix leaks promptly, and stagger heavy use (laundry and dishwasher) to avoid peak inflow.
• Protect the drain field: Keep heavy loads, vehicles, and future construction off the drain field area to prevent soil compaction.
• Drain-field-friendly practices: Use septic-safe products; avoid chemical toxins, solvents, and oil down drains. Do not flush wipes, feminine hygiene products, or plastics.
• Seasonal readiness: In dry summers, monitor inflow carefully and adjust irrigation and watering schedules to reduce extra effluent.

Pumping and inspection schedule for El Centro homes

1. Know your tank size: Most residential tanks range from 1,000 to 1,500 gallons. A larger home or added bathrooms may require more capacity.
2. Pumping interval: In desert climates with typical usage, plan for pumping every 3–4 years, but adjust based on family size, tank size, and observed solids buildup.
3. Annual inspection: Have a licensed septic contractor inspect the tank, baffles, and the distribution or dosing system (if present) at least once a year.
4. Record-keeping: Maintain receipts and inspection reports. Note pumping dates, measured sludge and scum levels, and any recommendations.

Soil and drainage considerations in El Centro

• Caliche and compacted layers: If soil tests show poor percolation or a shallow absorption area, a contractor may recommend a mound or buried absorption bed designed for arid soils.
• Drain field spacing: In sandy soils, infiltration can be faster, but salts and groundwater proximity can still constrain field size and layout. Always follow a licensed professional's design.
• Salt and mineral content: High mineral content in irrigation water or groundwater can affect soil permeability over time. Monitor for crusting on the surface and consider a professional evaluation if drainage changes are noticed.

Summer water use and greywater guidance

• Use greywater wisely: In California, greywater systems require proper design and permitting. When implemented correctly, greywater can reduce the volume entering the septic tank and extend life of the system. Consult local codes and a licensed installer.
• Irrigation timing: Water lawns and landscapes in the early morning or late evening to minimize evaporation and runoff, reducing unnecessary inflow to the septic system.

Signs of trouble and what to do

• Common indicators: Slow drains, frequent backups, gurgling sounds, strong sewage odors, wet or lush spots above the drain field, or unusually high groundwater near the system.
• Immediate steps if you suspect a problem:
  1. Conserve water to lower inflow.
  2. Avoid flushing solids or using the garbage disposal excessively.
  3. Schedule a licensed septic professional for a diagnosis and pump if required.

Local resources and official guidelines

• EPA: Onsite Wastewater Treatment Systems (septic systems) guidance and basics.
• California-specific onsite wastewater resources and best practices (check local regulations and permits with your county or city).
  • https://www.epa.gov/septic (EPA guidance remains a reliable starting point for state adaptations)

Practical reminder for El Centro homeowners

• In a desert climate, proactive maintenance, modest daily water use, and prompt professional input when issues arise are the best ways to protect your septic system's life and your home's comfort.

Cost Expectations for Septic Services in El Centro

Septic Tank Pumping and Cleaning

• What's included: removing settled solids, cleaning the tank baffles, inspecting inlet/outlet pipes, checking the effluent filter if present, and noting any signs of trouble (cracks, roots, or partial clogging). In El Centro, desert soils and occasional irrigation runoff can increase mineral buildup and odor concerns, so teams may also inspect for mineral deposits and adjust recommendations.
• Why it matters here: Regular pumping is key in arid climates to prevent solids from reaching the drain field, especially with high-effluent usage during hot months.
• Cost in El Centro: typically $350–$700 for a standard residential tank; larger tanks or difficult access can push to $800–$1,000.

Routine System Inspections and Maintenance

• What's included: visual inspection of the tank and leach/drain field, check of baffles, inspection of the septic filter (if equipped), and basic performance checks. Some visits may include a camera inspection of piping or a soil absorption evaluation if a problem is suspected.
• When to schedule: at least every 1–3 years for typical households; more often if you have a newer system, a growth in usage, or prior issues.
• Cost in El Centro: basic inspection $100–$180; full comprehensive inspection with overnight notes or camera access $200–$350.

Septic Tank Repair

• What's included: fixing cracks, replacing damaged baffles, repairing inlet/outlet piping, sealants or gasket replacement, and diagnosing odors or backups.
• Unique considerations in El Centro: high daytime temperatures and dusty conditions can accelerate wear on seals and lids; access and tank depth influence labor needs.
• Cost in El Centro: small repairs often $200–$800; more complex fixes or replacements $1,000–$3,500+, plus parts.

Drain Field Evaluation, Repair, and Replacement

• What's included: evaluation of soil absorption, groundwater interaction, trench or bed integrity, piping leaks, and possible rejuvenation options; repair may involve venting, rewiring, or replacement of affected trenches.
• El Centro factors: sandy or clay soils common in the Imperial Valley affect field design and replacement costs; weather-related settling and irrigation practices can impact performance.
• Cost in El Centro: evaluation $300–$800; drain field repair $4,000–$12,000; full replacement $8,000–$20,000+ (sizes vary widely).

Septic System Installation or Replacement

• What's included: site evaluation, soil testing, system design, permit coordination, trench layout, tank and field installation, backfill, and initial startup.
• El Centro specifics: desert soils and climate require careful design for evapotranspiration and drought conditions; higher labor and material costs may apply due to access and terrain.
• Cost in El Centro: typical new installation $12,000–$25,000 for a conventional system; with challenging soils or larger homes, $25,000–$40,000+.

System Design, Permitting, and Engineering

• What's included: site-specific design, hydraulics calculations, load assessment, permit submittals, and any required inspections.
• Local factors: Imperial County and El Centro jurisdictions may require specific setbacks, inspection milestones, and permit fees.
• Cost in El Centro: design $1,000–$3,000; permit and plan review $100–$1,500 depending on scope and agency.

Routine Maintenance Plans

• What's included: scheduled pumping, inspections, and a maintenance calendar; some providers offer discounted bundles for multi-year service.
• Cost in El Centro: annual plans $150–$500, depending on system size and included services.

Official resources:

• EPA Septic Systems:
• Imperial County Public Health Department: https://www.icphd.org/