Calipatria State Prison, CA
Lead detected, under the action levels
Latest 90th-percentile lead: 1.6 ppb (monitoring period 2024-2026). 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.
Who runs the water here
Calipatria State Prison serves about 4,800 people through 106 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by the state and draws surface water, in Imperial County, California. EPA system ID: CA1310800; phone on file: 760-348-7000. 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 2023 (2.4 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Calipatria State Prison is 2.4 ppb across 9 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 1.6 ppb |
| 2023 | 2.4 ppb |
| 2020 | 0 (not detected) |
| 2019 | 0 (not detected) |
| 2019 | 0 (not detected) |
| 2018 | 0 (not detected) |
| 2018 | 0 (not detected) |
| 2017 | 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. Calipatria State Prison's 1.6 ppb sits at the 76th percentile in California and the 65th nationally (higher means more lead).
Neighbouring systems
28 other systems share Imperial County; 4 of them have a higher latest lead result than Calipatria State Prison. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| El Centro, City Of | 44,124 | 0 (not detected) |
| Calexico, City Of | 40,357 | 0 (not detected) |
| Brawley, City Of | 26,862 | 0 (not detected) |
| Imperial, City Of | 22,102 | 0 (not detected) |
| Gswc - Calipatria | 7,475 | 0 (not detected) |
| Heber Public Utility District | 7,312 | 0 (not detected) |
| Holtville, City Of | 6,355 | 0.9 ppb |
| Centinela State Prison | 4,100 | 1.6 ppb |
| Westmorland, City Of | 2,202 | 0 (not detected) |
| Seeley Cwd | 1,729 | 0 (not detected) |
Next steps for Imperial, CA
Test your own tap with a certified lab first-draw sample; Imperial, 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 Calipatria State Prison 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. Systems that went over once often dip back under; here is what that means.