We read 8 results from Tri County Wcd’s 2025 water quality report. No results over a legal limit; 1 above a health goal or guideline.
Serves about 20,490 people · Water system ID CO0143755 · Read the district’s 2025 report (opens in a new tab)
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Results from the 2025 report
Each number is copied from the district’s report and links to the page it’s printed on. Where the report lists several plants, wells or purchased water, the highest is shown.
| Contaminant | Result | Health goal | Legal limit | What it means |
|---|---|---|---|---|
| Lead90th percentile of 30 homes tested, 0 over the action level · sampled 2023 · Customer taps (Project 7 system) · 2025 report, page 6 | 2.4 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal12x the health goal |
| Bariumaverage · range 0.04 to 0.04 · sampled 2023 · Project 7 Water Authority plant · 2025 report, page 8 | 0.04 ppm | 2 ppm | 2 ppm | Below the health goal |
| Disinfection byproducts (HAA5)average · range 1 to 48.4 · sampled 2024 · Tri-County Water distribution · 2025 report, page 10 | 19.7 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)average · range 21.9 to 47.9 · sampled 2024 · Tri-County Water distribution · 2025 report, page 10 | 35 ppb | None set | 80 ppb | Below the legal limit |
| Hexachlorocyclopentadieneaverage · range 0.09 to 0.1 · sampled 2024 · Project 7 Water Authority plant · 2025 report, page 8 | 0.09 ppb | 50 ppb | 50 ppb | Below the health goal |
| Turbidity (cloudiness)highest measured · sampled 2024 · Project 7 Water Authority plant · 2025 report, page 7 | 0.15 NTU | None set | 1 NTU | Below the legal limit |
| Calciumaverage · range 28.5 to 37.4 · sampled 2024 · Project 7 Water Authority plant · 2025 report, page 11 | 32 ppm | None set | None | No health limit |
| Lithiumaverage · range ND to 14.4 · sampled 2024 · Tri-County Water distribution · 2025 report, page 12 | 14.4 ppb | None set | None | No health limit |
Utility results describe the whole system, measured where water enters the pipes, not your tap. Your home’s plumbing can add lead or copper. 1 number we weren’t sure about is held back until a person checks.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in Tri County Wcd’s water between Jun 2023 and Mar 2024. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- Lithium14.4 ppbFound in 1 of 4 samples · highest resultAbove EPA’s health reference level of 10 ppb (a guide, not a legal limit)
Source: EPA UCMR 5 occurrence data. The highest single result is shown; one high sample doesn’t mean every glass is that high.
What you can do
Nothing here is an emergency notice: if the district has a violation, it must tell customers directly. If you’d like to lower these at your tap, these are the treatments that remove them, and the catalog shows the models certified for each. Ranking is by certified removal; commissions never change the order.
Lead
Found: Lead
What removes it: Certified carbon block or RO.
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