Washington Ridge C.C., CA
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2026-2028). 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 Washington Ridge C.C.
Washington Ridge C.C. serves about 70 people through 4 service connections, which makes it a very small system under EPA's size classes. It is owned by the state and draws groundwater, in Nevada County, California. EPA system ID: CA2910013; phone on file: 530-401-8517. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
Against the period ending 2022 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Washington Ridge C.C. is 4.35 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2028 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2019 | 2.27 ppb |
| 2016 | 4.35 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. Washington Ridge C.C.'s reported as 0 (not detected) sits at the 13th percentile in California and the 6th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
20 other systems share Nevada County; 11 of them have a higher latest lead result than Washington Ridge C.C.. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Truckee-Donner Pud, Main | 36,730 | 3.9 ppb |
| Nevada Id - E. George, Banner Mountain | 17,154 | 0 (not detected) |
| Nevada Id - Loma Rica | 14,072 | 0.77 ppb |
| Nevada Id - Lake Wildwood | 9,108 | 0 (not detected) |
| Nevada Id - Lake Of Pines | 6,870 | 0 (not detected) |
| City Of Grass Valley | 4,947 | 0.88 ppb |
| City Of Nevada City | 3,148 | 0 (not detected) |
| Washington Water District | 330 | 41.4 ppb |
| Creekside Village | 300 | 0 (not detected) |
| Ananda Village | 226 | 0 (not detected) |
What to do in your house
Look up your address in Washington Ridge C.C.'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 Washington Ridge C.C. 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.