Desert Cooperative Mhp, CA
Exceeded the action level in the past
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2026-2026). 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 Desert Cooperative Mhp
Desert Cooperative Mhp serves about 100 people through 43 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Jackson County, California. EPA system ID: OR4101138; phone on file: 209-932-8747. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
Against the period ending 2025 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Desert Cooperative Mhp is 42 ppb across 7 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0 (not detected) |
| 2025 | 0 (not detected) |
| 2024 | 0 (not detected) |
| 2023 | 0 (not detected) |
| 2022 | 42 ppb over 15 |
| 2019 | 0.33 ppb |
| 2016 | 3.12 ppb |
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. Desert Cooperative Mhp's reported as 0 (not detected) sits at the 18th percentile in California and the 10th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Jackson County
3 other systems share Jackson County; 2 of them have a higher latest lead result than Desert Cooperative Mhp. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Arbor Village | 670 | 1 ppb |
| Grants Pass Mobile Home Park Llc | 140 | 0 (not detected) |
| Mckee Bridge Mobile Home Park | 40 | 3.51 ppb |
Next steps for Stockton, CA
Test your own tap with a certified lab first-draw sample; Stockton, 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 Desert Cooperative Mhp 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.