Septic in Highland, CA

Last updated: Mar 21, 2026

Welcome to Highland, where you can practically feel the sun on the hillsides and the community feel of a close-knit neighborhood. If you own here or are thinking about buying, you're likely weighing how your waste water will be handled on a property that's often a bit farther from big-city sewer lines. You're not alone—septic systems are a common—and very workable—part of Highland life, especially on older streets and more rural lots where public sewer access isn't available to every property.

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

Yes. In Highland, many homes rely on on-site septic systems because public sewer service isn't present on every block or subdivision. If your home isn't connected to a city sewer, a septic system is the typical, practical solution. When buying a home, it's smart to confirm with the city or county whether a sewer connection exists or is planned, and to review any septic permits, maintenance records, and inspection notes from the seller. A quick check now can prevent surprises later.

Why homes typically use septic systems in Highland

  • Distance to sewer mains: Extending or upgrading a centralized sewer system to every parcel can be costly and time-consuming, especially on hillsides or older developments.
  • Soil and groundwater considerations: Highland's varied soils and drainage patterns make on-site treatment a sensible fit when designed and installed properly.
  • Cost and practicality: For many parcels, a well-designed septic system offers a cost-effective, reliable option that aligns with property size and usage.
  • Development patterns: Historically, many Highland neighborhoods grew with private waste-water solutions rather than centralized lines, so septic became a standard choice.
  • Regulation and environmental stewardship: Modern septic design and regular maintenance help protect groundwater and local health standards, which is a priority in our climate.

A high-level look at why septic exists here

On-site systems are a straightforward, practical response to how Highland's land, utilities, and development came together. When a system is correctly sized, professionally installed, and regularly cared for, it provides dependable wastewater treatment right on your property—without the ongoing disruption and cost of a large municipal upgrade.

As your neighbor and local septic pro, I'm here to help you navigate what you need to know, from inspection steps to maintenance schedules and finding a trusted local technician. In the sections ahead, you'll find practical steps you can take today.

Where Septic Systems Are Common in Highland

Map of septic coverage in Highland, CA

Common patterns in Highland

In Highland, septic systems are most often found on parcels that aren't connected to a municipal sewer line, especially on the outer edges of the community and in hillside or rural areas where extending a sewer main is challenging. These patterns result from a mix of terrain, development history, and cost considerations.

  • Outer Highland neighborhoods and unsewered parcels
  • Rural, hillside, or low-density lots built before sewer mains reached the area
  • Properties with soils that have suitable percolation for on-site disposal when properly designed
  • Older homes or those undergoing renovations that retain on-site wastewater design

Why these patterns exist

Sewer extension projects in Highland can be expensive and time-consuming. The area's topography, distance from existing sewer mains, and land use patterns mean that not every parcel justifies or qualifies for a sewer connection. Soil and groundwater conditions also influence whether an OWTS (on-site wastewater system) is appropriate and how it must be designed. Local regulations require proper permitting and inspection of septic systems, especially when homes are renovated or expanded.

  • Terrain and distance from sewer mains drive higher costs
  • Urban core sewer plans may not cover hillside or distant parcels
  • Soil type and groundwater concerns dictate system design
  • OWTS permitting and inspection are standard parts of building and renovation work

How to confirm your Highland property status

If you're unsure whether your home uses sewer or a septic system, follow these steps.

  1. Check with local authorities: contact San Bernardino County Public Health Environmental Health Services or use the county's OWTS information to see if your parcel is on sewer or on a septic system.
  2. Look for telltale signs: a sewer service lateral at the street and a cleanout or manhole location in your yard can indicate a septic setup; absence of a sewer connection may point to on-site disposal.
  3. Review property records: the county's property profile or assessor records often note wastewater disposal details for a parcel.
  4. When in doubt, hire a licensed pro: a local septic contractor or civil/soil engineer can perform a proper site evaluation and soil test to confirm status and assist with any needed design updates.

Maintenance and planning for Highland septic

If you do have a septic system, proactive maintenance helps prevent failures and costly repairs.

  • Pump every 3–5 years (frequency depends on tank size, household size, and effluent quality)
  • Minimize water usage and avoid dumping fats, oils, and non-biodegradable products
  • Protect the drain field: keep heavy equipment off the area and manage surface water drainage
  • Schedule periodic inspections, especially before adding bedrooms or major renovations
  • California State Water Resources Control Board – Septic systems:
  • San Bernardino County Public Health – Onsite Wastewater Systems (OWTS):
  • California Department of Public Health – Onsite Wastewater Systems: Programs/CEH/DRSEM/Pages/Onsite-Wastewater-Systems.aspx

Septic vs Sewer: What Homeowners in Highland Should Know

How septic systems work in Highland

  • A typical septic system uses a tank buried on your property to hold wastewater, solids settle to the bottom, and liquid flows to a drainfield where it's absorbed by soil.
  • Local soil, slope, and groundwater can affect performance and sizing. A properly designed system in Highland should account for household size, water usage, and landscaping.
  • Routine maintenance is your responsibility: periodic pumping, inspections, and protecting the drainfield from damage.

How a municipal sewer system works (if available)

  • Wastewater travels through a network of pipes to a treatment facility, where solids are removed and water is treated before returning to the environment.
  • You won't deal with tank pumps or drainfield health, but you'll receive a monthly or quarterly sewer bill from your utility.
  • Sewer systems require ongoing maintenance by the city or county, and you're typically billed regardless of how much water you use.

Pros and cons at a glance

  • Septic system (on-site)
    • Pros: No monthly sewer bill, strong long-term value if well maintained.
    • Cons: Requires regular pumping and care; damage to the drainfield can be costly to repair.
  • Municipal sewer
    • Pros: No on-site maintenance worries; predictable monthly costs.
    • Cons: Ongoing sewer charges; repairs or upgrades are handled by the municipality; you're dependent on system reliability and capacity.

Costs to expect

  • Septic system
    • Installation: widely varies (roughly several thousand to tens of thousands of dollars) depending on tank size, soil conditions, and local permitting.
    • Maintenance: pumping every 3–5 years is common; typical pump cost ranges around a few hundred dollars, with inspections adding to the expense.
  • Sewer connection (if available)
    • Connection fees can include tap charges, impact fees, and trenching in your yard; ongoing costs are the monthly sewer bill.
  • Long-term consideration: a well-maintained septic system can save money over time, but aging or neglected systems can lead to expensive repairs.

When to consider connecting to sewer

  • If your neighborhood is extending sewer service, city or county plans may offer connection programs with deadlines or subsidies.
  • If the drainfield is failing, or you're frequently pumping, converting to sewer may be cost-effective in the long run.
  • Always compare total ownership costs (connection fees + monthly bills) with ongoing septic maintenance.

Maintenance basics you should follow

  1. Pump and inspect regularly: typically every 3–5 years for residential systems; more often with heavy use.
  2. Use water wisely: fix leaks, install low-flow fixtures, and spread out high-water activities.
  3. Be careful what goes down the drain: no grease, solids, chemicals, or non-biodegradable items. Use a garbage disposal sparingly.
  4. Protect the drainfield: avoid parking or heavy equipment on the area; plant shallow-rooted vegetation only.
  5. Schedule professional evaluations: a local septic pro can assess tank health, baffles, and drainage.

Signs you may have a septic problem

  • Gurgling drains, slow flushing, or frequent backups.
  • Wet, soggy spot or strong odor near the drainfield.
  • Bright green, lush patches in the yard despite little irrigation.
  • Standing wastewater or undersized septic components.

Safe-use and best-practice tips

  • Spread out water-intensive tasks (laundry, showers) to reduce peak loads.
  • Refrain from flushing wipes, diapers, cooking grease, or chemical cleaners.
  • If you discharge non-water items to the system, verify they won't harm bacteria or clog the drainfield.
  • Consider a septic-friendly landscape plan to protect the drainfield and its soil.

Official resources

  • EPA septic systems overview:

Typical Septic System Types in Highland

Conventional gravity septic system

  • How it works: A single septic tank receives household wastewater, where solids settle and fats float. Liquid effluent then exits by gravity into a drainfield of perforated pipes buried in the soil.
  • Typical components: Septic tank, distribution box, perforated lines or trenches, and the soil as the final treatment stage.
  • When you'll see it: This is the most common setup for many Highland homes with adequate soil depth and good drainage.
  • Pros and cons: Simple, long track record, often lower upfront cost. Requires suitable soil and regular pumping every 3–5 years to prevent solids buildup.

Pressure-dosed drainfield systems

  • How it works: A submersible pump delivers effluent under pressure to multiple trenches through a manifold, keeping effluent evenly distributed.
  • Why it's used: Helps achieve uniform absorption in soils with variable percolation or shallow restrictive layers.
  • Maintenance note: Regular inspections and service from a licensed pro; pump maintenance and dosing schedules are key for performance.

Mound systems (raised bed)

  • Why Highland homeowners choose them: When soil depth is limited, groundwater is high, or soils aren't well suited to a traditional drainfield.
  • How it works: A conventional tank feeds a dosing chamber that pumps effluent up into an elevated drainfield built on imported fill.
  • What to expect: More surface footprint and higher maintenance requirements, but effective where gravity drainfields won't perform.

Alternative Treatment Units (ATUs) and advanced pretreatment

  • What they are: Small, mechanical/biological systems (aerobic treatment units, compact sand filters, or other pretreatment devices) that treat wastewater before it reaches the drainfield.
  • When used: In areas with marginal soils, high strength wastewater, or cooler temperatures that slow natural treatment.
  • Benefits and cautions: Improved effluent quality can expand usable drainfield areas, but these systems use electricity and often require more frequent servicing.

Chamber systems and modular trench options

  • What you'll see: Replacing gravel-filled trenches with prefabricated plastic chambers that create wide, shallow, open channels for effluent.
  • Advantages: Faster installation, often gentler on varying soil conditions, and can be cost-effective in suitable sites.
  • Maintenance: Functionally similar to conventional systems; still require pumping and routine inspections.

Other considerations for Highland

  • Local regulations: All systems must meet San Bernardino County/California wastewater guidelines and setback requirements. Soil testing and permits are typically required before installation.
  • Site constraints: Rockier soils, slope, groundwater depth, and drainage influence system choice in Highland soils.
  • Professional guidance: A licensed septic professional can confirm soil suitability, sizing, and whether an ATU, mound, or chamber system is appropriate for your lot.

How to identify what you have

  1. Look for access lids or cleanouts in your yard or near the home; these indicate a drainfield and tank layout. 2) Check your property records or permit history for an "OWTS" or septic system diagram. 3) Have a licensed septic contractor perform a site evaluation to confirm tank type, drainfield design, and remaining life. 4) Request an as-built plan from the county if available; this clarifies exact components and layout. 5) Schedule regular maintenance and pump-outs based on the system type and county recommendations.

Maintenance basics by system type

  • Conventional: Pump every 3–5 years, limit solids, use water efficiently, protect the drainfield from heavy vehicles and roots.
  • ATU/advanced: More frequent inspections, energy considerations, and potential media replacement; follow manufacturer and local guidance.
  • Mound or pressure-dosed: Adhere strictly to dosing schedules and soil absorption performance; monitor groundwater and surface drainage.
  • Chamber: Treat with the same level of respect as a conventional system; ensure chamber trenches remain free of root intrusion and compaction.

Resources

Common Septic Issues in Highland

Soil conditions and drain field challenges in Highland

  • Highland's hillside lots and clay-heavy soils can slow or block effluent drainage. Shallow groundwater or perched water tables common in some areas worsen drain field saturation.
  • Signs of soil-related trouble include damp, lush patches above the field, persistent odors, or standing water after rainfall.
  • What to do:
    • Have a licensed septic pro perform a soil percolation test and evaluate your drain field design (mound systems or alternatives may be needed on poor soils).
    • Keep heavy equipment, vehicles, and structures away from the drain field to protect soil structure.
    • Follow a proactive pumping/inspection plan per local guidelines to extend field life.

Water usage patterns and irrigation load

  • Inland Southern California households often run irrigation during dry seasons, which can overload the septic system if not managed carefully.
  • Excess irrigation pushes more water through the drain field, raising the chance of clogging and reducing treatment efficiency.
  • Practical steps:
    1. Balance irrigation with weather, using smart controllers and rain sensors.
    2. Fix leaks promptly and install low-flow fixtures.
    3. Space out laundry and dishwasher cycles, especially during heavy irrigation days.
    4. Monitor drainage after watering to catch early signs of field stress.
  • If drains slow after watering, schedule a professional inspection to rule out field issues.

Tree roots and landscaping near septic

  • Roots from nearby trees and shrubs grow toward moisture and can invade pipes or compress the drain field trenches.
  • Common symptoms: gurgling toilets, slow drains, or wet areas above the drain field.
  • Mitigation tips:
    • Maintain a setback between trees and the system (consult a pro for exact distances, often 10–20 feet varies by site).
    • Consider root barriers where feasible and plan plantings away from the septic zone.
    • Regular camera inspections help catch root intrusion early.

Aging systems and maintenance gaps

  • Many Highland homes have older septic components (tanks, baffles, or pumps) reaching the end of their service life.
  • Warning signs include cracks, outlet baffle failure, or a failing pump chamber in pump-assisted systems.
  • Maintenance plan:
    • Pump every 3–5 years (or per the manufacturer/installer guidance) and keep detailed service records.
    • Schedule annual inspections, especially if you have a mechanical pump or aeration component.
    • Address minor issues promptly to prevent costly replacements.

Misuse, chemicals, and household loads

  • Fats, oils, and grease, flushable wipes, solvents, pesticides, and harsh cleaners disrupt beneficial bacteria and can clog the system.
  • Garbage disposals add solids, increasing pumping frequency and tank loading.
  • Best practices:
    • Use septic-safe products and install strainers on sinks.
    • Limit disposal use; compost appropriate scraps.
    • Avoid dumping solvents, paints, or pesticides down drains.

Drain field failure signs and steps to take

  • Early indicators: slow drains, recurring odors, wet spots over the drain field, or unusually lush grass over the area.
  • Immediate actions:
    • Reduce water use and stop nonessential irrigation.
    • Avoid driving or parking on the drain field.
  • Professional steps: a septic pro may perform tele-view or CCTV inspections, soil testing, and recommend repair or replacement options (which can include drain field remediation or replacement).

Resources:

  • EPA: Septic systems in homes and small businesses:
  • San Bernardino County Environmental Health Septic Systems:
  • State Water Resources Control Board Onsite Wastewater Treatment Systems:

Septic Inspection, Permits & Local Oversight

Who Oversees Septic Systems in Highland

  • In Highland, as in much of San Bernardino County, the county Environmental Health Services (EHS) oversees onsite wastewater systems (OWTS). They handle permits, reviews, inspections, and enforcement to protect groundwater and public health.
  • The City may coordinate with EHS for local approvals; check with the Highland Building or Planning Department if you're unsure about local requirements.

Do I Need a Permit?

  • New OWTS installation
  • System replacement or substantial repair
  • Repairs or alterations that change wastewater flows
  • Modifications to tie-in to a drainage field or pump system
  • Any change in ownership or use that affects wastewater

What to Submit (Typical)

  • A completed OWTS permit application
  • Site plan showing tank locations, leach field, and setbacks (distance from wells, structures, property lines)
  • Design documents from a CA-licensed OWTS designer
  • Soil evaluation and percolation test results as required
  • Plans stamped by the licensed professional
  • Any county or city forms as requested

The Permitting Process (Steps)

  1. Hire a CA-licensed OWTS designer and a licensed septic contractor.
  2. Have soils work and percolation testing completed as needed.
  3. Prepare design plans according to county standards.
  4. Submit to San Bernardino County Environmental Health Services for review.
  5. Pay the required permit and plan-check fees.
  6. Receive plan approval and schedule on-site inspections.

Inspections: What to Expect

  • Inspections occur at key milestones: pre-backfill for trenches, after tank and distribution components are installed, and final approval before the system is covered.
  • The inspector checks:
    • Tank placement and integrity
    • Proper septic field layout and leach area
    • Correct effluent distribution and pump/access provisions
    • Adherence to setback distances and codes
  • If deficiencies are found, you'll receive an itemized list and a re-check will be scheduled.

If You're Buying, Selling, or Replacing a System

  • Request current permit status and any open inspections.
  • Ensure any repairs or replacements have approved plans and final inspections.
  • Consider a professional septic inspection as part of escrow to disclose system condition.

Helpful Resources and Contacts

  • San Bernardino County Environmental Health Services – Septic Systems:
  • California State Water Resources Control Board – Onsite Wastewater Program:

Septic Maintenance for Homes in Highland

Highland-specific considerations

Highland sits in the Inland Empire, where clay soils, occasional winter groundwater rise, and hillside lots are common. These factors can influence how quickly a drain field absorbs effluent and how vulnerable a system is to saturation or root intrusion. In addition, irrigation practices and drought patterns here can affect your septic system's workload. Keep these in mind:

  • Clay or dense soils slow infiltration. If the soil around the drain field stays moist or muddy after rainfall, your system may be stressed.
  • Groundwater and flooding risk in winter can saturate the drain field, delaying absorption and increasing the chance of backups.
  • Tree roots and landscape plants near the system can invade pipes or clog the drain field. Plant modestly and keep large roots away from the septic area.
  • Hillside properties require careful drainage management to prevent runoff from carrying mulch, soil, or debris onto the drain field or toward the tank.

Regular maintenance schedule

A proactive schedule reduces the chance of surprises and costly repairs.

  1. Pump every 3–5 years (more often with high wastewater flow, many bedrooms, or older, smaller tanks). Your service professional can tailor this to your household.
  2. Schedule an annual professional OWTS inspection to check tank integrity, baffles, lids, and any filters. Ask them to test drainage field performance and look for signs of groundwater intrusion.
  3. Keep a simple maintenance log with pump dates, inspection notes, and any repairs. This helps you plan next service and improves resale records.
  4. If your system has an effluent or tank filter, service or replace it as recommended. A clean filter protects the drain field from clogging solids.
  5. Use reputable, compatible parts and avoid "upgrades" or DIY modifications that could affect hydraulic balance or venting.

Protecting the drain field in Highland soils

The drain field is the heart of the system. Protect it from damage and overuse.

  • Do not drive or park on the drain field or trench area. Compaction kills infiltration capacity.
  • Limit irrigation directly over the drain field. Schedule heavy irrigation away from the field and spread out watering times.
  • Plant wisely: choose shallow-rooted or non-invasive plants near the system. Keep trees or large shrubs well away from the drain field.
  • Maintain proper grading and drainage to prevent surface water from pooling over the drain field during storms.
  • Use septic-safe products and avoid chemicals that can harm beneficial bacteria. When in doubt, ask your installer or a licensed septic pro.

Water-use practices to protect your septic

In Highland, careful water use helps your system last longer and perform better.

  • Fix leaks promptly and install water-saving fixtures (low-flow toilets, faucets, and appliances).
  • Stagger water-intensive activities (laundry, dishwashing) to avoid peak loads on the tank.
  • Minimize chemical cleaners, degreasers, antifreeze, solvents, and paint thinners entering the system.
  • If you irrigate a lawn or garden, consider irrigation efficiency and rainwater capture where feasible to reduce drain-field demand during dry periods.

Common Highland issues and quick fixes

  • Signs of drain-field stress: soggy soil above the field, strong sewage odors, or gurgling sounds in plumbing. If you notice these, call a licensed OWTS pro promptly.
  • Root intrusion: if you suspect roots near the tank or lines, a professional camera inspection can guide safe remediation.
  • Winter saturation: after heavy rain or runoff, give the system time to recover before pushing more wastewater into the tank.

Resources and where to get help

  • San Bernardino County Department of Public Health – Environmental Health Services (Onsite Wastewater Systems):

Cost Expectations for Septic Services in Highland

Septic Tank Pumping

  • What it includes: removal of deposited sludge and scum from the tank, cleaning of baffles, and inspection of tank condition during service.
  • Highland-specific notes: hillside and narrow driveways can raise access time and equipment needs; expect possible mini-tractor or skid-steer use on steeper lots.
  • Typical Highland cost: approximately $350–$800 per pumping, depending on tank size (common residential tanks are 1,000–1,500 gallons), access, and disposal fee.

Septic Tank Inspection & Certification

  • What it includes: visual check of tank, baffles, inlet/outlet tees, and overall integrity; may include sludge depth measurement and a report; camera if needed.
  • Highland-specific notes: for real estate transfers or permits, county or seller disclosures may require formal verification; scheduling around busy market times can affect price.
  • Typical Highland cost: about $250–$500 for standard inspections; with certification or expedited service, expect toward the upper end.

Drain Field Evaluation & Soil Testing

  • What it includes: site evaluation, soil percolation tests, soil profile assessment, and drainage design input from a licensed professional.
  • Highland-specific notes: Highland soils can be clay-rich, rocky, or shallow, which often increases evaluation complexity and may lead to higher costs or alternate designs (mound or ATU) when conventional fields won't meet code.
  • Typical Highland cost: $300–$1,500 for evaluation; if a full design is required, costs can rise to $2,000–$6,000.

Drain Field Installation / Replacement

  • What it includes: design, excavation, trench or mound construction, gravel beds, distribution piping, and final connection to the tank.
  • Highland-specific notes: hillside properties, limited access, and rockier soils raise labor and equipment needs; local setbacks and permit requirements add complexity.
  • Typical Highland cost: $15,000–$40,000 for conventional trench systems; mound systems or extensive site prep can push to $60,000–$90,000 or more in challenging lots.

Aerobic Treatment Unit (ATU) / Advanced Treatment System

  • What it includes: installation of an enhanced treatment unit, power supply, pump chamber, monitoring, and alarms; often requires a higher level of maintenance.
  • Highland-specific notes: electricity reliability and access can affect ongoing maintenance; some hillside sites justify ATU where conventional systems aren't feasible.
  • Typical Highland cost: $12,000–$25,000 for installation; annual maintenance typically $500–$2,000.

Septic Line Cleaning / Hydro-Jetting

  • What it includes: jetting and snaking of main line and lateral lines to remove roots, grease, and buildup; camera inspection afterwards.
  • Highland-specific notes: root intrusion from nearby trees or shrubs and limited access routes can raise service time and equipment mobilization costs.
  • Typical Highland cost: $200–$600 per service call, depending on length of line and obstruction severity.

Tank Lid / Access Port Replacement

  • What it includes: removal of old or damaged lids, replacement with secure, code-compliant access ports; may involve backfilling and compaction.
  • Highland-specific notes: heavy lifting and equipment may be needed on hilly or tight properties, slightly raising labor fees.
  • Typical Highland cost: $500–$2,000 per lid replacement, depending on material and accessibility.

Annual Maintenance Plans

  • What it includes: scheduled pumping, inspections, alarm testing, filter cleaning (if applicable), and priority dispatch.
  • Highland-specific notes: owning a home with a demanding site often benefits from bundled plans to smooth out uneven yearly costs.
  • Typical Highland cost: $150–$500 per year, varying with service level and tank size.

Permitting & Inspections (County Requirements)

  • What it includes: review and approval of plans, permit issuance, and final inspection to meet San Bernardino County standards.
  • Highland-specific notes: Highland projects can require additional setback checks or site-specific conditions; permit fees vary with project scope.
  • Typical Highland cost: $100–$600 depending on project type and local fees.

Official Resources

  • San Bernardino County Environmental Health – septic systems: