Bethel Island Mhc, CA
Lead detected, under the action levels
Latest 90th-percentile lead: 2.6 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.
About Bethel Island Mhc
Bethel Island Mhc serves about 185 people through 65 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Contra Costa County, California. EPA system ID: CA0707575; phone on file: 209-644-7200. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
That is up 2.6 ppb from 0 ppb in the period ending 2023. The highest 90th-percentile result EPA holds for Bethel Island Mhc is 2.6 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 2.6 ppb |
| 2023 | 0 (not detected) |
| 2018 | 2 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. Bethel Island Mhc's 2.6 ppb sits at the 82nd percentile in California and the 78th nationally (higher means more lead).
Nearby utilities
38 other systems share Contra Costa County; 4 of them have a higher latest lead result than Bethel Island Mhc. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Contra Costa Water District | 210,500 | 0 (not detected) |
| City Of Antioch | 116,781 | 0 (not detected) |
| Brentwood | 64,513 | 0 (not detected) |
| City Of Pittsburg | 62,500 | 0 (not detected) |
| Diablo Water District | 47,158 | 1.9 ppb |
| City Of Martinez | 31,015 | 0 (not detected) |
| Golden State Water Company - Bay Point | 23,765 | 0.49 ppb |
| Town Of Discovery Bay | 16,790 | 0 (not detected) |
| Pleasantimes Mutual Water Co | 644 | 0.5 ppb |
| Clayton Palms Water | 549 | - |
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 Bethel Island Mhc 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.