Plymouth, City Of, 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 Plymouth, City Of
Plymouth, City Of serves about 1,060 people through 535 service connections, which makes it a small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Amador County, California. EPA system ID: CA0310004; phone on file: 209-245-6941. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Plymouth, City Of's lead record
Against the period ending 2022 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Plymouth, City Of 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) |
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. Plymouth, City Of's reported as 0 (not detected) sits at the 42nd percentile in California and the 27th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Amador County
18 other systems share Amador County; 2 of them have a higher latest lead result than Plymouth, City Of. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Awa Buckhorn Plant | 8,791 | 0 (not detected) |
| Awa, Ione | 7,227 | 0 (not detected) |
| City Of Jackson | 5,079 | 0 (not detected) |
| Awa, Tanner | 4,940 | 0 (not detected) |
| Awa - Camanche Village | 2,402 | 0 (not detected) |
| Jackson Valley Irrigation District | 1,303 | 0 (not detected) |
| First Mace Meadow # 1 | 838 | 0 (not detected) |
| River Pines Pud | 574 | 0 (not detected) |
| Hope Foundation/Moriah Heights | 299 | 0 (not detected) |
| First Mace Meadows Unit No. 2 | 230 | 0 (not detected) |
Next steps for Plymouth, CA
Look up your address in Plymouth, City Of'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 Plymouth, City Of 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.