Treasure Creek Woods Mwc, CA
Lead detected, under the action levels
Latest 90th-percentile lead: 0.58 ppb (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. 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.
Treasure Creek Woods Mwc at a glance
Treasure Creek Woods Mwc serves about 131 people through 32 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: CA5301101; phone on file: 530-286-2880. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
Against the period ending 2020 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Treasure Creek Woods Mwc is 0.58 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0.58 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. Treasure Creek Woods Mwc's 0.58 ppb sits at the 65th percentile in California and the 44th nationally (higher means more lead).
Other water systems in Trinity County
15 other systems share Trinity County; 10 of them have a higher latest lead result than Treasure Creek Woods Mwc. 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 |
| 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) |
Your move
Test your own tap with a certified lab first-draw sample; Trinty 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 Treasure Creek Woods Mwc whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1470 ppb (copper action level 1,300 ppb).
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. Why sampled homes are the worst-case ones is in the guide to reading the number. The action level is dropping - the 10 ppb rule from 2027.