Cal-Water Service Co.-Marysville, 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.
About Cal-Water Service Co.-Marysville
Cal-Water Service Co.-Marysville serves about 12,888 people through 3,708 service connections, which makes it a large system under EPA's size classes. It is privately owned and draws groundwater, in Yuba County, California. EPA system ID: CA5810001; phone on file: 408-367-8593. Call that number and ask whether your address has a lead, galvanized or unknown service line.
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 Cal-Water Service Co.-Marysville is 0 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2019 | 0 (not detected) |
| 2016 | 0 (not detected) |
How Cal-Water Service Co.-Marysville compares
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. Cal-Water Service Co.-Marysville'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
20 other systems share Yuba County; 13 of them have a higher latest lead result than Cal-Water Service Co.-Marysville. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Linda County Water District | 21,654 | 1.69 ppb |
| Olivehurst Public Utility District | 16,595 | 0 (not detected) |
| Plumas Lake | 11,374 | 0 (not detected) |
| City Of Wheatland | 4,124 | 0.63 ppb |
| North Yuba Water District | 2,772 | 2.43 ppb |
| Beale Air Force Base | 2,000 | 0 (not detected) |
| River Highlands Csd | 200 | 0 (not detected) |
| Castlewood Mobile Home Park | 200 | 0.5 ppb |
| Countryside Mobile Home Park | 185 | 2.5 ppb |
| Camptonville Community Serv Dist | 180 | 10 ppb |
What to do in your house
Look up your address in Cal-Water Service Co.-Marysville'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 Cal-Water Service Co.-Marysville 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.