East Three Rivers Mutual Water Corp, CA
Lead detected, under the action levels
Latest 90th-percentile lead: 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. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
East Three Rivers Mutual Water Corp at a glance
East Three Rivers Mutual Water Corp serves about 40 people through 15 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Tulare County, California. EPA system ID: CA5400744; phone on file: 559-392-9812. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
That is up 3 ppb from 0 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for East Three Rivers Mutual Water Corp is 3 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 3 ppb |
| 2022 | 0 (not detected) |
| 2019 | 0 (not detected) |
| 2016 | 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. East Three Rivers Mutual Water Corp's 3 ppb sits at the 85th percentile in California and the 81st nationally (higher means more lead).
Nearby utilities
90 other systems share Tulare County; 6 of them have a higher latest lead result than East Three Rivers Mutual Water Corp. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Cws - Visalia | 153,522 | 0 (not detected) |
| Tulare, City Of | 72,241 | 0 (not detected) |
| Porterville, City Of | 63,487 | 0 (not detected) |
| Dinuba, City Of | 27,641 | 0 (not detected) |
| Lindsay, City Of | 12,659 | 0 (not detected) |
| Exeter, City Of | 11,169 | 11 ppb |
| Farmersville, City Of | 10,243 | 1.3 ppb |
| Orosi Public Utility District | 8,300 | 0 (not detected) |
| Woodlake, City Of | 7,918 | 0 (not detected) |
| Earlimart Pud | 7,679 | 0 (not detected) |
Next steps for Three Rivers, CA
Test your own tap with a certified lab first-draw sample; Three Rivers, 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 East Three Rivers Mutual Water Corp 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. The action level is dropping - the 10 ppb rule from 2027.