We read 12 results from Brighton City of’s 2024 water quality report. No results over a legal limit; 2 above a health goal or guideline.
Serves about 56,304 people · Water system ID CO0101025 · Read the district’s 2024 report (opens in a new tab)
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Results from the 2024 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 |
|---|---|---|---|---|
| Copper90th percentile of 60 homes tested, 1 over the action level · listed as a violation in the report · sampled 2023 · Customer taps · 2024 report, page 10 | 0.93 ppm | 0.3 ppm | 1.3 ppm (action level) | Above the health goal3.1x the health goal |
| Lead90th percentile of 60 homes tested, 0 over the action level · listed as a violation in the report · sampled 2023 · Customer taps · 2024 report, page 10 | 2 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal10x the health goal |
| Bariumaverage · range 0.03 to 0.03 · listed as a violation in the report · sampled 2023 · Entry points · 2024 report, page 11 | 0.03 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chromium (total)average · range 1 to 1 · listed as a violation in the report · sampled 2023 · Entry points · 2024 report, page 11 | 1 ppb | None set | 100 ppb | Below the legal limit |
| Disinfection byproducts (HAA5)average · range 7.4 to 21.4 · listed as a violation in the report · sampled 2023 · Distribution system · 2024 report, page 10 | 13.6 ppb | None set | 60 ppb | Below the legal limit |
| Fluorideaverage · range 0.68 to 0.69 · listed as a violation in the report · sampled 2023 · Entry points · 2024 report, page 11 | 0.69 ppm | 1 ppm | 4 ppm | Below the health goal |
| Nitrate (as N)average · range 4.4 to 4.5 · listed as a violation in the report · sampled 2023 · Entry points · 2024 report, page 11 | 4.45 ppm | 10 ppm | 10 ppm | Below the health goal |
| Seleniumaverage · range 5 to 5 · listed as a violation in the report · sampled 2023 · Entry points · 2024 report, page 11 | 5 ppb | 30 ppb | 50 ppb | Below the health goal |
| Turbidity (cloudiness)highest measured · listed as a violation in the report · sampled 2023 · Entry points · 2024 report, page 10 | 0.23 NTU | None set | 1 NTU | Below the legal limit |
| Xylenesaverage · range ND to 0.0008 · listed as a violation in the report · printed as .56 ppb · sampled 2023 · Entry points · 2024 report, page 11 | 0.00056 ppm | 10 ppm | 10 ppm | Below the health goal |
| Lithiumhighest measured · range 14.4 to 28.7 · Entry points (UCMR5) · 2024 report, page 13 | 28.7 ppb | None set | None | No health limit |
| Sodiumaverage · range 51.7 to 52.5 · sampled 2023 · Entry points · 2024 report, page 11 | 52.1 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. 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 Brighton City of’s water between Jan 2024 and Aug 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFOA5.3 pptFound in 4 of 16 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFOS10.6 pptFound in 8 of 16 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFHxS7.1 pptFound in 9 of 16 samples · highest resultNo federal limit in force for this one
- PFBS7.4 pptFound in 12 of 16 samples · highest resultNo federal limit in force for this one
- Lithium31.9 ppbFound in 16 of 16 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: Copper, Lead
What removes it: Reverse osmosis or Certified carbon block or RO.
PFAS ("forever chemicals")
Found: PFOA (EPA testing), PFOS (EPA testing)
What removes it: Reverse osmosis.
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