Covington Mill Mwc-Division B, CA
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2024-2026). 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.
Covington Mill Mwc-Division B at a glance
Covington Mill Mwc-Division B serves about 40 people through 99 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Trinity County, California. EPA system ID: CA5301104; phone on file: 818-957-2649. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Covington Mill Mwc-Division B's lead record
Against the period ending 2020 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Covington Mill Mwc-Division B is 0 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0 (not detected) |
| 2020 | 0 (not detected) |
| 2017 | 0 (not detected) |
How Covington Mill Mwc-Division B 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. Covington Mill Mwc-Division B's reported as 0 (not detected) sits at the 5th percentile in California and the 2nd 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 Trinity County; 11 of them have a higher latest lead result than Covington Mill Mwc-Division B. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Weaverville C.S.D. | 3,975 | 1.2 ppb |
| Trinity Co. W.W. Dist #1 | 2,324 | 2.4 ppb |
| Trinity Center M.W.C. | 729 | 1.82 ppb |
| Lewiston Community Services District | 677 | 1 ppb |
| Trinity Village Mutual Water | 330 | 2 ppb |
| Salyer Mutual Wc (Formerly Riverview Ac) | 231 | 0 (not detected) |
| Trinity Knolls Mutual Water Company | 138 | 1.5 ppb |
| Treasure Creek Woods Mwc | 131 | 0.58 ppb |
| Salyer Heights W.S., Inc | 130 | 0 (not detected) |
| Burnt Ranch Estates | 115 | 1.28 ppb |
Your move
Look up your address in Covington Mill Mwc-Division B'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 Covington Mill Mwc-Division B 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. What a 90th-percentile result does and does not tell you: how to read a lead result. Small systems behave differently: why small systems go over more often.