Branger Mutual Water Company, Inc., CA
Exceeded the action level in the past
Latest 90th-percentile lead: 3.3 ppb (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.
Who runs the water here
Branger Mutual Water Company, Inc. serves about 300 people through 82 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Sonoma County, California. EPA system ID: CA4900545; phone on file: 707-481-3587. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Branger Mutual Water Company, Inc.'s lead record
That is down 14.7 ppb from 18 ppb in the period ending 2024. The highest 90th-percentile result EPA holds for Branger Mutual Water Company, Inc. is 18 ppb across 4 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 3.3 ppb |
| 2024 | 18 ppb over 15 |
| 2021 | 0 (not detected) |
| 2018 | 2.8 ppb |
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. Branger Mutual Water Company, Inc.'s 3.3 ppb sits at the 87th percentile in California and the 84th nationally (higher means more lead).
Nearby utilities
128 other systems share Sonoma County; 13 of them have a higher latest lead result than Branger Mutual Water Company, Inc.. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Santa Rosa, City Of | 178,452 | 1.32 ppb |
| Petaluma, City Of | 61,427 | 0 (not detected) |
| Rohnert Park, City Of | 43,821 | 0 (not detected) |
| Windsor, Town Of | 25,561 | 0 (not detected) |
| Valley Of The Moon Water District | 23,140 | 0 (not detected) |
| Healdsburg, City Of | 10,972 | 0 (not detected) |
| Sonoma, City Of | 10,619 | 0 (not detected) |
| Cloverdale, City Of | 8,710 | 0 (not detected) |
| California-American Larkfield (Puc) | 7,911 | 6 ppb |
| Sebastopol, City Of | 7,522 | 0 (not detected) |
Next steps for Santa Rosa, CA
Test your own tap with a certified lab first-draw sample; Santa Rosa, 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 Branger Mutual Water Company, Inc. 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. Why sampled homes are the worst-case ones is in the guide to reading the number. More in what a past exceedance means today.