We read 18 results from City of Westminster’s 2025 water quality report. No results over a legal limit; 6 above a health goal or guideline.
Serves about 35,256 people · Water system ID MD0060015 · Read the district’s 2025 report (opens in a new tab)
Open this district in the water lookupCompare with your own test results, see the district map and get matched filters.
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 |
|---|---|---|---|---|
| Cadmiumhighest measured · range ND to 3 · Entry points · 2025 report, page 6 | 3 ppb | 0.04 ppb | 5 ppb | Above the health goal75x the health goal |
| Copper90th percentile of homes tested, 0 over the action level · sampled 2024 · Customer taps · 2025 report, page 5 | 0.36 ppm | 0.3 ppm | 1.3 ppm (action level) | Above the health goal1.2x the health goal |
| Gross alpha (radioactivity)highest measured · range ND to 9.6 · sampled 2024 · Entry points · 2025 report, page 7 | 9.6 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| PFOA (a PFAS)average · range 0.91 to 12 · Entry points · 2025 report, page 8 | 5.7 ppt | 0.007 ppt | 4 ppt from 2029 | Above the federal limit that takes effect in 20291.4x the 4 ppt federal limit that takes effect in 2029Not a violation yet: EPA's 4 ppt limit is final, but water systems don't have to meet it until 2029. |
| PFOS (a PFAS)average · range 2.1 to 6.8 · Entry points · 2025 report, page 8 | 3.4 ppt | 1 ppt | 4 ppt from 2029 | Above the health goal3.4x the health goal |
| Radium (combined 226 + 228)highest measured · sampled 2024 · Entry points · 2025 report, page 7 | 0.9 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Bariumhighest measured · range ND to 0.1 · Entry points · 2025 report, page 6 | 0.01 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorinehighest running annual average · range 0.1 to 1.95 · Distribution system · 2025 report, page 5 | 1.3 ppm | None set | 4 ppm | Below the legal limit |
| Chromium (total)highest measured · range ND to 4.2 · sampled 2024 · Entry points · 2025 report, page 6 | 4.2 ppb | None set | 100 ppb | Below the legal limit |
| Disinfection byproducts (HAA5)highest running annual average · range 22.1 to 48.7 · Distribution system (140 Village Shopping Center) · 2025 report, page 6 | 46 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 26.1 to 98.6 · Distribution system (Pump Station 7) · 2025 report, page 6 | 74 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · range ND to 0.5 · Entry points · 2025 report, page 6 | 0.5 ppm | 1 ppm | 4 ppm | Below the health goal |
| Lead90th percentile of homes tested, 0 over the action level · printed as <0.005 ppm · sampled 2024 · Customer taps · 2025 report, page 5 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
| Nitrate (as N)highest measured · range 2.64 to 5.83 · Entry points · 2025 report, page 6 | 5.83 ppm | 10 ppm | 10 ppm | Below the health goal |
| PFHxS (a PFAS)average · range 0.68 to 4.2 · Entry points · 2025 report, page 8 | 2.47 ppt | None set | 10 ppt from 2029 | Below the legal limit |
| PFNA (a PFAS)average · range 1.1 to 1.4 · Entry points · 2025 report, page 8 | 1.25 ppt | None set | 10 ppt from 2029 | Below the legal limit |
| Seleniumhighest measured · range ND to 4 · sampled 2024 · Entry points · 2025 report, page 6 | 4 ppb | 30 ppb | 50 ppb | Below the health goal |
| PFBS (a PFAS)average · range 1.8 to 10 · Entry points · 2025 report, page 8 | 5.75 ppt | 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.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in City of Westminster’s water between Jan 2023 and Sep 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFOA12.4 pptFound in 10 of 28 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFOS6.9 pptFound in 4 of 28 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFHxS4.2 pptFound in 7 of 28 samples · highest resultNo federal limit in force for this one
- PFBS8.6 pptFound in 15 of 28 samples · highest resultNo federal limit in force for this one
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.
Copper
Found: Copper
What removes it: Reverse osmosis.
Radium and uranium
Found: Gross alpha (radioactivity), Radium (combined 226 + 228)
What removes it: Reverse osmosis.
PFAS ("forever chemicals")
Found: PFOA (a PFAS), PFOS (a PFAS), PFOA (EPA testing), PFOS (EPA testing)
What removes it: Reverse osmosis.
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