We read 22 results from Montrose Pws’s 2025 water quality report. No results over a legal limit; 2 above a health goal or guideline.
Serves about 384 people · Water system ID MO1010541 · 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 |
|---|---|---|---|---|
| Atrazinehighest measured · range ND to 0.39 · Purchased water (wholesaler) · 2025 report, page 2 | 0.39 ppb | 0.15 ppb | 3 ppb | Above the health goal2.6x the health goal |
| Pentachlorophenolhighest measured · range ND to 0.04 · Purchased water (wholesaler) · 2025 report, page 2 | 0.04 ppb | 0 ppb | 1 ppb | Above the health goalThe health goal is zero |
| Aluminumhighest measured · range 0.02 to 0.02 · Purchased water (wholesaler) · 2025 report, page 3 | 0.02 ppm | — | 0.2 ppm guideline | Within the guideline |
| Bariumhighest measured · range 0.06 to 0.06 · Purchased water (wholesaler) · 2025 report, page 2 | 0.06 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chloridehighest measured · range 30.5 to 30.5 · Purchased water (wholesaler) · 2025 report, page 3 | 30.5 ppm | — | 250 ppm guideline | Within the guideline |
| Copper90th percentile of homes tested, 0 over the action level · sampled 2024 · Customer taps · 2025 report, page 2 | 0.23 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 45 to 65.5 · Purchased water: Distribution system, highest of 3 sources · 2025 report, page 3 | 55 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 53.6 to 77.8 · Purchased water: Distribution system, highest of 3 sources · 2025 report, page 3 | 78 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · range 0.21 to 0.21 · Purchased water (wholesaler) · 2025 report, page 2 | 0.21 ppm | 1 ppm | 4 ppm | Below the health goal |
| Lead90th percentile of homes tested, 0 over the action level · sampled 2024 · Customer taps · 2025 report, page 2 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
| Nitrate (as N)highest measured · range 0.53 to 0.53 · Purchased water (wholesaler) · 2025 report, page 2 | 0.53 ppm | 10 ppm | 10 ppm | Below the health goal |
| pHhighest measured · range 8.01 to 8.01 · Purchased water (wholesaler) · 2025 report, page 3 | 8.01 | — | — | Normal range |
| Sulfatehighest measured · range 48.9 to 48.9 · Purchased water (wholesaler) · 2025 report, page 3 | 48.9 ppm | — | 250 ppm guideline | Within the guideline |
| Total dissolved solidshighest measured · range 272 to 272 · Purchased water (wholesaler) · 2025 report, page 3 | 272 ppm | — | 500 ppm guideline | Within the guideline |
| Zinchighest measured · range 0.0015 to 0.0015 · Purchased water (wholesaler) · 2025 report, page 3 | 0.0015 ppm | — | 5 ppm guideline | Within the guideline |
| Alkalinityhighest measured · range 141 to 141 · Purchased water (wholesaler), highest of 2 sources · 2025 report, page 3 | 141 ppm | None set | None | No health limit |
| Calciumhighest measured · range 47.2 to 47.2 · Purchased water (wholesaler) · 2025 report, page 3 | 47.2 ppm | None set | None | No health limit |
| Hardnesshighest measured · range 8.71 to 8.71 · Purchased water (wholesaler) · 2025 report, page 3 | 8.71 gpg (149 ppm) | — | — | Hard |
| Magnesiumhighest measured · range 7.44 to 7.44 · Purchased water (wholesaler) · 2025 report, page 3 | 7.44 ppm | None set | None | No health limit |
| Nickelhighest measured · range 2.35 to 2.35 · printed as 0.00235 MG/L · Purchased water (wholesaler) · 2025 report, page 3 | 2.35 ppb | None set | None | No health limit |
| Potassiumhighest measured · range 6.56 to 6.56 · Purchased water (wholesaler) · 2025 report, page 3 | 6.56 ppm | None set | None | No health limit |
| Sodiumhighest measured · range 22.6 to 22.6 · Purchased water (wholesaler) · 2025 report, page 3 | 22.6 ppm | 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.
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.
Industrial chemicals and pesticides
Found: Atrazine, Pentachlorophenol
What removes it: Carbon block or RO.
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