Bella Vista Water Sys, CA
Lead detected, under the action levels
Latest 90th-percentile lead: 6.5 ppb (monitoring period 2017-2019). 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.
Bella Vista Water Sys at a glance
Bella Vista Water Sys serves about 93 people through 33 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: CA0707589; phone on file: 925-376-8543. 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 down 6.5 ppb from 13 ppb in the period ending 2017. The highest 90th-percentile result EPA holds for Bella Vista Water Sys is 13 ppb across 2 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2019 | 6.5 ppb |
| 2017 | 13 ppb over 10 |
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. Bella Vista Water Sys's 6.5 ppb sits at the 95th percentile in California and the 94th nationally (higher means more lead).
Neighbouring systems
38 other systems share Contra Costa County; 2 of them have a higher latest lead result than Bella Vista Water Sys. 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 | - |
Your move
Test your own tap with a certified lab first-draw sample; Moraga, 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 Bella Vista Water Sys 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. What a 90th-percentile result does and does not tell you: how to read a lead result. Systems that went over once often dip back under; here is what that means.