Rebuilding After the Eaton Fire: Septic, Cesspool and Sewer Rules for Altadena

Many lots in Altadena burned in the Eaton fire were never on sewer. They were served by a septic system or an older cesspool, and that system now decides a lot about what can be rebuilt. LA County's recovery guidance sets out the rules. Here is a plain-English walk through them.

First question: how far is the public sewer?

The County splits properties by distance to a public sewer: more than 200 linear feet, or within 200 linear feet. The County also notes that a sewer pipe cannot cross a neighboring property line to reach the public sewer.

More than 200 feet from the sewer

The existing septic system has to be verified by a qualified licensed contractor (Class A, C-42 or C-36) and be in good working condition. Then:

• Like-for-like rebuild: the home keeps the same number of bedrooms or bedroom equivalents. The floor plan can change by up to 10%, the system has to fully serve the home, and all setbacks must be met.
• Adding bedrooms or bedroom equivalents: this needs Public Health permits for a system that matches the new home.
• System not in good working order: the County treats it as failing, and owners should contact Public Health for guidance.

Within 200 feet of the sewer

If the septic system is in good working condition, you can rebuild on it only with the same number of bedrooms and bedroom equivalents. Connection to the public sewer is required if the project includes expansion or modifications, if the system later fails, or if it is not in good working condition. If the County finds the property cannot connect, the owner can request a waiver to keep the septic system.

Cesspools

A cesspool is a lined pit that takes sewage straight from the house, without a septic tank. In the Eaton fire burn area, the County allows an existing cesspool to be used during reconstruction if two conditions are met:

• A qualified professional runs a percolation test following the County's procedures, and Public Health reviews and approves the results.
• No added wastewater flow. No added bedrooms, bathrooms, bedroom equivalents or ADUs.

To rebuild with added bedrooms, the cesspool has to be upgraded to a septic system approved by Public Health, or connected to the sewer if it is within 200 feet.

What this means for your schedule

The septic answer can change the floor plan, the budget and the order of work, so it belongs at the start of the rebuild, not after the plans are drawn. Burned lots also tend to have buried or damaged lids and lines that need locating before anyone can say what condition the system is in.

Where we fit

JFPEC holds a Class A General Engineering license. We locate and expose the tank, pits and lines, inspect the system and document its condition, and replace tanks or connect to the sewer when the project calls for it. System design comes from a qualified designer, and we build to the approved plans. We also do the rest of the underground and foundation work on many rebuilds, and we can manage the construction side for owners who want one point of contact.

Rules change, and the County's recovery pages are updated as programs evolve. Check the current guidance, or call the County's Onsite Wastewater Treatment Program at (626) 430-5380, before you commit to a plan.