Uc - Davis, CA
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2021-2023). 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.
About Uc - Davis
Uc - Davis serves about 13,177 people through 602 service connections, which makes it a large system under EPA's size classes. It is owned by the state and draws surface water, in Yolo County, California. EPA system ID: CA5710009; phone on file: 530-754-5591. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
Against the period ending 2022 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Uc - Davis is 0.9 ppb across 6 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2021 | 0.9 ppb |
| 2020 | 0.72 ppb |
| 2020 | 0 (not detected) |
| 2017 | 0 (not detected) |
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. Uc - Davis's reported as 0 (not detected) sits at the 54th percentile in California and the 38th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
15 other systems share Yolo County; 0 of them have a higher latest lead result than Uc - Davis. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Davis | 67,826 | 0 (not detected) |
| City Of Woodland | 61,462 | 0 (not detected) |
| City Of West Sacramento | 55,991 | 0 (not detected) |
| City Of Winters | 7,115 | 0 (not detected) |
| Esparto C.S.D. | 3,572 | 0 (not detected) |
| Wild Wings Golf Community | 1,115 | 0 (not detected) |
| Knights Landing Svc. Dist. | 1,099 | 0 (not detected) |
| Madison Service Dist | 876 | 0 (not detected) |
| Cal Am - Dunnigan | 602 | 0 (not detected) |
| Yolo Co Housing Authority-El Rio Villa | 432 | 0 (not detected) |
Next steps for Davis, CA
Look up your address in Uc - Davis'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 Uc - Davis 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. A zero today does not rule out a jump later - the rules are tightening in 2027.