River Estates Mutual Water Company, CA
Exceeded the action level in the past
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2023-2025). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
River Estates Mutual Water Company at a glance
River Estates Mutual Water Company serves about 250 people through 83 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Mendocino County, California. EPA system ID: CA2300605; phone on file: 707-462-2666. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
Against the period ending 2022 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for River Estates Mutual Water Company is 33.7 ppb across 5 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2021 | 0 (not detected) |
| 2020 | 33.7 ppb over 15 |
| 2017 | 0 (not detected) |
Where this result ranks
Of the 2,884 California systems with a lead result, the median latest reading is 0 ppb; 30 are over 15 ppb right now and 215 have gone over at some point. River Estates Mutual Water Company's reported as 0 (not detected) sits at the 30th percentile in California and the 17th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
40 other systems share Mendocino County; 6 of them have a higher latest lead result than River Estates Mutual Water Company. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Ukiah, City Of | 16,067 | 0 (not detected) |
| Fort Bragg, City Of | 7,117 | 0 (not detected) |
| Willits, City Of | 6,175 | 0 (not detected) |
| Millview County Water District | 5,500 | 0 (not detected) |
| Redwood Valley County Water District | 5,200 | 0 (not detected) |
| Willow County Water District | 3,797 | 0 (not detected) |
| Brooktrails Township Csd | 3,632 | 0 (not detected) |
| North Gualala Water Company | 3,508 | 0 (not detected) |
| Rogina Water Company Inc. | 2,554 | 0 (not detected) |
| Laytonville County Water District | 1,152 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; Ukiah, CA may offer free or low-cost kits through the utility. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask River Estates Mutual Water Company whether it covers that cost before hiring anyone - many utilities now do.
These figures describe homes the utility sampled, not your tap. Only your service line record or a test of your own water answers the question for your house. The lead result guide covers how utilities pick the homes they sample. More in what a past exceedance means today.