We read 16 results from City of Princeton’s 2025 water quality report. No results over a legal limit; 4 above a health goal or guideline.
Serves about 21,760 people · Water system ID TX0430008 · 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 |
|---|---|---|---|---|
| Bromatehighest measured · range 2.5 to 2.5 · Treated water (NTMWD) · 2025 report, page 15 | 2.5 ppb | 0.1 ppb | 10 ppb | Above the health goal25x the health goal |
| Copper90th percentile of homes tested, 0 over the action level · Customer taps · 2025 report, page 15 | 0.55 ppm | 0.3 ppm | 1.3 ppm (action level) | Above the health goal1.8x the health goal |
| Gross beta (radioactivity)highest measured · range 4.1 to 4.1 · sampled 2023 · Treated water (NTMWD) · 2025 report, page 14 | 4.1 pCi/L | 0 pCi/L | 50 pCi/L | Above the health goalThe health goal is zero |
| Lead90th percentile of homes tested, 0 over the action level · Customer taps · 2025 report, page 15 | 2.16 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal11x the health goal |
| Bariumhighest measured · range 0.03 to 0.03 · Treated water (NTMWD) · 2025 report, page 14 | 0.03 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorineaverage · range 0.09 to 3.28 · Distribution system · 2025 report, page 14 | 2.17 ppm | None set | 4 ppm | Below the legal limit |
| Chlorine dioxideaverage · range ND to 240 · printed as 0.014 ppm · Distribution system · 2025 report, page 14 | 14 ppb | None set | 800 ppb | Below the legal limit |
| Disinfection byproducts (HAA5)highest measured · range 4.87 to 25.3 · Distribution system · 2025 report, page 15 | 25.3 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest measured · range 9.61 to 45.4 · Distribution system · 2025 report, page 15 | 45.4 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · range 0.23 to 0.23 · Treated water (NTMWD) · 2025 report, page 14 | 0.23 ppm | 1 ppm | 4 ppm | Below the health goal |
| Nitrate (as N)highest measured · range 0.07 to 0.37 · Treated water (NTMWD) · 2025 report, page 14 | 0.37 ppm | 10 ppm | 10 ppm | Below the health goal |
| Turbidity (cloudiness)highest measured · Treated water (NTMWD) · 2025 report, page 15 | 0.14 NTU | None set | 1 NTU | Below the legal limit |
| Bromodichloromethaneaverage · range 3.86 to 15.7 · Distribution system · 2025 report, page 15 | 15.7 ppb | None set | None | No health limit |
| Bromoformaverage · range ND to 4.06 · Distribution system · 2025 report, page 15 | 4.06 ppb | None set | None | No health limit |
| Chloroformaverage · range 2.4 to 10 · Distribution system · 2025 report, page 15 | 10 ppb | None set | None | No health limit |
| Dibromochloromethaneaverage · range 3.2 to 15.7 · Distribution system · 2025 report, page 15 | 15.7 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.
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.
Radium and uranium
Found: Gross beta (radioactivity)
What removes it: Reverse osmosis.
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