Dublin San Ramon Services District, CA
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
Who runs the water here
Dublin San Ramon Services District serves about 98,776 people through 25,458 service connections, which makes it a large system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Alameda County, California. EPA system ID: CA0110009; phone on file: 925-875-2371. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
That is down 5.3 ppb from 5.3 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Dublin San Ramon Services District is 10 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 5.3 ppb |
| 2019 | 10 ppb |
| 2016 | 3 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. Dublin San Ramon Services District's reported as 0 (not detected) sits at the 61st percentile in California and the 40th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
13 other systems share Alameda County; 3 of them have a higher latest lead result than Dublin San Ramon Services District. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| East Bay Mud | 1,468,000 | 0 (not detected) |
| Alameda County Water District | 344,000 | 0 (not detected) |
| City Of Hayward | 162,954 | 0 (not detected) |
| City Of Pleasanton | 76,689 | 0 (not detected) |
| California Water Service - Livermore | 60,414 | 7.5 ppb |
| City Of Livermore | 38,892 | 0 (not detected) |
| Alameda Point | 600 | 0 (not detected) |
| Castlewood Domestic Water System | 524 | 0 (not detected) |
| Trailer Haven Mobile Home Park | 459 | 2.7 ppb |
| Town Of Sunol - Sfpuc | 281 | 0 (not detected) |
Next steps for Pleasanton, CA
Look up your address in Dublin San Ramon Services District's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Dublin San Ramon Services District 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. Small systems behave differently: why small systems go over more often.