Rio Cosumnes Correctional Center [Sws], CA
Exceeded the action level in the past
Latest 90th-percentile lead: 4 ppb (monitoring period 2025-2025). 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.
About Rio Cosumnes Correctional Center [Sws]
Rio Cosumnes Correctional Center [Sws] serves about 2,800 people through 13 service connections, which makes it a small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Sacramento County, California. EPA system ID: CA3400229; phone on file: 916-875-2216. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
That is up 4 ppb from 0 ppb in the period ending 2024. The highest 90th-percentile result EPA holds for Rio Cosumnes Correctional Center [Sws] is 20000 ppb across 12 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 4 ppb |
| 2024 | 0 (not detected) |
| 2023 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2021 | 0 (not detected) |
| 2021 | 0 (not detected) |
| 2020 | 0 (not detected) |
| 2020 | 0 (not detected) |
| 2019 | 0 (not detected) |
| 2019 | 0 (not detected) |
| 2017 | 0 (not detected) |
| 2016 | 20000 ppb over 15 |
Against other California systems
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. Rio Cosumnes Correctional Center [Sws]'s 4 ppb sits at the 90th percentile in California and the 88th nationally (higher means more lead).
Other water systems in Sacramento County
61 other systems share Sacramento County; 7 of them have a higher latest lead result than Rio Cosumnes Correctional Center [Sws]. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Sacramento Main | 527,979 | 0 (not detected) |
| Sacramento Suburban Water District | 194,444 | 0 (not detected) |
| Scwa - Laguna/Vineyard | 188,417 | 0 (not detected) |
| Folsom, City Of - Main | 80,969 | 0 (not detected) |
| Citrus Heights Water District | 67,818 | 0 (not detected) |
| Cal Am - Suburban Rosemont | 54,893 | 0 (not detected) |
| Cal Am - Parkway | 50,646 | 1 ppb |
| Cal Am - Lincoln Oaks | 48,105 | 1 ppb |
| Golden State Water Co. - Cordova | 47,366 | 0 (not detected) |
| Elk Grove Water District | 44,065 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; Sacramento, 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 Rio Cosumnes Correctional Center [Sws] 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. Why an old exceedance still matters: over the limit before, under it now.