Los Angeles County Septic Rules and Pumping

Septic rules in Los Angeles County

Los Angeles County's Onsite Wastewater Treatment Program, run by Public Health's Environmental Health Division at (626) 430-5380, reviews septic plans for unincorporated areas and for 16 cities that joined its program, Lancaster, Palmdale and Santa Clarita among them. Its application package (rev. 8/2026) charges $1,528.00 to review a conventional system and $1,986.00 for a non-conventional one. You're invoiced after you submit. Plans go to a field office or the Baldwin Park headquarters with a feasibility report from a Qualified Professional, such as a registered engineer or geologist.

The county sends a status notice within 20 business days, and your city's Building and Safety office issues the building permit only after that approval. When a system is 15 years old or more, or its plans are missing, a permit request also brings an evaluation of the existing system by a contractor holding a CSLB Class A, Class B, C-42 or C-36 license. A Class B-only contractor can't do that certification inspection.

If a public sewer runs within 200 feet of the building, you connect instead. No county inspection comes with a sale here, since the program lists point-of-sale inspections as N/A and leaves them to independent providers. That program won approval from the Los Angeles water board on May 21, 2018, though the Antelope Valley answers to the Lahontan board. A tank pumped more than twice in 6 months counts as failing, and the pumper, who holds a county vehicle permit, has 24 hours to report it.

The county's rules, line by line

Who permits septic systems: Los Angeles County Department of Public Health, Environmental Health Division, Onsite Wastewater Treatment Program, 5050 Commerce Drive, Baldwin Park; (626) 430-5380. Serves unincorporated areas and 16 LAMP cities (Agoura Hills, Bradbury, Duarte, Glendora, Hidden Hills, La Canada Flintridge, La Habra Heights, La Verne, Lomita, Lancaster, Palmdale, Palos Verdes Estates, Rancho Palos Verdes, Rolling Hills, Rolling Hills Estates, Santa Clarita). Field offices in Lancaster, (661) 471-4842, Santa Clarita and Calabasas.
Governing code: Los Angeles County Code Title 11, Chapter 11.38 (onsite systems, the Local Agency Management Program and sewage pumping vehicles), with fees in Title 8, Chapter 8.04; adopted Oct 2, 2018, effective Nov 1, 2018. Section 11.38.710 has the requirements reviewed at least every five years.
Inspection at sale: The county says it has no such rule. The county's Local Agency Management Program lists point-of-sale inspections as N/A: an inspection at a sale or refinance is done by an independent provider, not required by the county. A separate evaluation of the existing system is required when a permit is sought and the system is 15 or more years old, its plans are missing or the property is modified.
Permit steps: Submit plans to any onsite wastewater field office or the Baldwin Park headquarters with a feasibility report by a Qualified Professional (California Professional Geologist, Certified Engineering Geologist, Registered Professional Engineer, Registered Soil or Geotechnical Engineer, or an REHS not employed by the county). The county issues a status notice within 20 business days; after approval, the local Building and Safety department issues the building permit. Applies to domestic systems under 10,000 gallons per day submitted on or after Nov 1, 2018. Connection to public sewer is required if it lies within 200 feet of the building.
Installers and evaluators: No county installer registry was found; installation is by a Qualified Contractor holding a CSLB Class A, Class B, C-42 or C-36 license, and a Class B-only contractor may not do certification inspections of existing systems. Pumping vehicle operators need a county public health permit, file quarterly service reports and must report a failing system within 24 hours of pumping.
Still to confirm with the county: The Los Angeles Regional Water Board approved the county program on May 21, 2018; the Antelope Valley portion is under the Lahontan Water Board. A system pumped more than twice in 6 months counts as failing.

Septic fees in Los Angeles County

Los Angeles County septic fees as printed
Item	Amount	Note
4301 Conventional Wastewater Treatment System review	$1,528.00	Application package rev. 8/2026
4302 Non-Conventional Wastewater Treatment System review	$1,986.00	Application package rev. 8/2026

4301 Conventional Wastewater Treatment System review$1,528.00

Application package rev. 8/2026

4302 Non-Conventional Wastewater Treatment System review$1,986.00

Application package rev. 8/2026

Rules and fees change every year, so confirm a line with the health department before you rely on it. "No rule found" means the pages and code we have say nothing on that line, which isn't the same as the county telling you there's no rule. To compare counties, use the county rules lookup.

What septic work costs

These are statewide estimates from our model, so they aren't Los Angeles County prices; where the county posts its own permit and evaluation fees, they are on this page.

Estimated septic cost ranges
Job	Estimated range	Unit
Septic pumping	$325 to $600	per visit
Septic inspection	$135 to $555	per inspection
Drain field	$1,200 to $8,150	per repair

Septic pumping$325 to $600

per visit

Septic inspection$135 to $555

per inspection

Drain field$1,200 to $8,150

per repair

These are estimates, not quotes. How we estimate costs.

All septic services

Cities in Los Angeles County

Each of these cities has 10,000 or more residents and follows Los Angeles County rules for septic, and its city page points back here.