Los Alamitos water and sewer rates
Who supplies water to Los Alamitos houses, what it costs, and how the sewer charge works.
Pay or manage it
Golden State Water Company (West Orange County)
Golden State Water Schedule R3-1-R, residential metered service, effective January 1, 2026: $36.76 a month for a 5/8 x 3/4-inch meter plus Tier 1 $4.921, Tier 2 $5.659 and Tier 3 $6.508 per Ccf.
| Use a month | Price per unit (CCF, 748 gallons) |
|---|---|
| Fixed charge | $36.76 a month |
| 0 to 12 units | $5.07 |
| 12 to 44 units | $5.81 |
| 44 to more | $6.66 |
- Source
- Water in the West Orange County System is a blend of treated groundwater from the Orange County Groundwater Basin and imported water from the Colorado River Aqueduct and State Water Project.
- Hardness
- Hardness as CaCO3 in 2025: average 13.8 grains/gal (range 3.67 - 21.6).
- PFAS
- PFOS in 2025: average 5.8 ng/L, range ND - 16.4 ng/L; PFOA average 3.0 ng/L, range ND - 8.3 ng/L.
Sewer
OC San’s regional sewer service fee ($397) is an annual charge on the property tax bill.
Ways to pay less
- Low income: Golden State Water CAP credit. Golden State Water's Customer Assistance Program gives low-income households in the Region 3 service areas a $16.00 monthly credit. How: Apply with Golden State Water with the income declaration the program requires.
Sources
- Golden State Water Schedule R3-1-R
- Golden State Water 2028-30 rate case, Los Alamitos area
- Golden State Water 2026 West Orange County water quality report
- Golden State Water: Los Alamitos
- Golden State Water Schedule LI (CAP)
- OC San: sewer rates and claim forms
- Rossmoor/Los Alamitos Area Sewer District Ordinance 42
Checked October 22, 2026. Every number here comes from the public sources listed, matched by our checker.
Rates change every year; this page shows when it was last checked. Nothing here is legal, tax or insurance advice.