Trinity Center M.W.C., CA
Lead detected, under the action levels
Latest 90th-percentile lead: 1.82 ppb (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. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
Trinity Center M.W.C. at a glance
Trinity Center M.W.C. serves about 729 people through 260 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws surface water, in Trinity County, California. EPA system ID: CA5310003; phone on file: 530-270-7632. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
That is up 1.82 ppb from 0 ppb in the period ending 2020. The highest 90th-percentile result EPA holds for Trinity Center M.W.C. is 1.82 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 1.82 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. Trinity Center M.W.C.'s 1.82 ppb sits at the 77th percentile in California and the 68th nationally (higher means more lead).
Other water systems in Trinity County
15 other systems share Trinity County; 4 of them have a higher latest lead result than Trinity Center M.W.C.. 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 |
| 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 |
| Rush Creek Mutual Water System | 102 | 0 (not detected) |
Next steps for Trinity Center, CA
Test your own tap with a certified lab first-draw sample; Trinity Center, CA may offer free or low-cost kits through the utility. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Trinity Center M.W.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. What a 90th-percentile result does and does not tell you: how to read a lead result. The action level is dropping - the 10 ppb rule from 2027.