Planning to install or modify a private well or septic system? Pattern helps property owners navigate well and septic permit requirements throughout Los Angeles County, ensuring applications meet local regulations and move through the approval process as efficiently as possible.
Well and septic permits are government-issued approvals homeowners need to acquire before installing a septic system or a private well.
Depending on the scope of the project, you may need a permit to build, replace, repair, modify, or remove private water wells and on-site wastewater treatment systems (OWTS) or septic systems.
Getting permits ensures that:
In most cases, the state or city’s environmental and health departments are the offices that oversee well and septic permitting. They also set the requirements. But that is where most states can wildly vary.
The State of California, for instance, requires a permit for all newly built wells. This often involves specific tests for underground water quality.
Compliance is important because, when designed or installed poorly, wells and septic tanks can cause serious public health risks.
A compromised septic system can release raw, untreated sewage and toxic gases, endangering humans and animals. Waste water contains pathogens, including disease-causing bacteria, viruses, and parasites.
In general, you need a permit for permanent wells, such as those that provide water for a household.
However, certain temporary wells may be exempt in some areas. A well drilled for a short-term construction site, for example, might not require a permit, though this can depend on which city or state you are in.
You may need a well drilling permit if you are:
New oil and gas wells are not allowed in California, including Los Angeles County, though there are existing structures.
A septic permit is necessary if you are installing a brand-new septic tank on a property that doesn’t already have access to public sewer. This may also apply to:
Most jurisdictions would order a permit before digging begins. Drilling without appropriate approvals can result in fines, mandatory removal of unpermitted work, stop-work orders, and significant delays.
That said, minor work and repairs don’t usually need city or state approval. According to the California Central Coast Water Board, you typically won’t need a permit for:
Of course, the safest approach is always to refer to local authorities. Confirm with your city or municipality’s health or environmental department whether your particular project requires permits to avoid potential fines.
For property owners in Los Angeles County, early planning is recommended due to the complexities of permitting procedures.
A septic system permit is exactly that—it allows private property owners to legally build, expand, or make significant alterations to their on-site wastewater treatment systems.
In a municipal sewer system, wastewater is transported to a centralized treatment facility, where it’s cleaned before being discharged into the local environment.
OWTS, on the other hand, treat water on-site, directly at the property. It consists of a septic tank that separates solids from liquids, distribution piping lines, and a drain field for filtering wastewater.
Because of the risk of contamination, most states or cities would require a permit for OWTS.
In Los Angeles County, the Los Angeles County Department of Public Health – Environmental Health Division and LA County Public Works – Building and Safety Division are responsible for septic permitting.
Similarly, a water well permit lets you construct, alter, repair, modify, destroy, or move an existing well on your property.
A permit, in this case, is necessary to ensure the project is designed in compliance with existing laws and doesn’t compromise underground aquifers. That, in addition to being a reliable source of clean water.
Because private wells draw water from underground using pumps, they need to be constructed well to prevent bacteria, fertilizers, pesticides, and other contaminants from entering.
Agencies usually consider various factors before giving the green light for a well permit application.
In many cases, they’ll evaluate the site and measure the distance from other water facilities, livestock areas, and potential sources of contamination.
No, you can’t generally build a well or septic system without a permit in Los Angeles County.
That also means that if a property relies on a private well or has an OWST installed, modifying, replacing, expanding, or abandoning these systems without appropriate permits can be deemed illegal.
Los Angeles is particularly rigid when it comes to wells because of its existing regulations protecting underground water. Soil boring or excavations deeper than 10 feet must follow an even stricter guideline.
A homeowner may need to coordinate with multiple agencies and provide proof that their construction won’t affect groundwater sustainability goals before they can start drilling.
Violations of these rules can result in penalties of up to $5,000. Offenders must also shoulder payments for the mandatory destruction of unlicensed work.
If the well passes inspection and is allowed to stay, retroactive permitting can also cost anywhere from $3,000 to $8,000.
Unapproved sanitation systems can even be more costly. Fines can range from a few hundred dollars to $10,000. If the OWTS fails environmental compliance checks, tearing the septic down can set you thousands of dollars more.
While requirements can vary by state, county, or city, permitting agencies usually follow similar steps and evaluate common factors before handing out approvals.
Here are some of the key requirements for well and septic permits:
The condition of the project’s site is crucial to getting a permit, and it’s one of the first factors age