We read 18 results from Edmond Pwa’s 2025 water quality report. No results over a legal limit; 5 above a health goal or guideline.
Serves about 79,408 people · Water system ID OK1020723 · 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 |
|---|---|---|---|---|
| Gross alpha (radioactivity)highest measured · range 1 to 10.8 · Wells / entry points · 2025 report, page 3 | 10.8 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Gross beta (radioactivity)highest measured · range ND to 7.7 · Wells / entry points · 2025 report, page 3 | 7.7 pCi/L | 0 pCi/L | 50 pCi/L | Above the health goalThe health goal is zero |
| Lead90th percentile of homes tested, 1 over the action level · Customer taps · 2025 report, page 2 | 0.8 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal4x the health goal |
| Total coliform bacteriahighest month · Distribution system · 2025 report, page 2 | 2.5 % positive | 0 % positive | 5 % positive | Above the health goalThe health goal is zero |
| Uraniumhighest measured · range ND to 16 · Wells / entry points · 2025 report, page 2 | 16 ppb | 0.6 ppb | 30 ppb | Above the health goal27x the health goal |
| Bariumhighest measured · range 0.05 to 0.17 · Wells / entry points · 2025 report, page 2 | 0.17 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorinehighest running annual average · Distribution system · 2025 report, page 2 | 1.1 ppm | None set | 4 ppm | Below the legal limit |
| Chromium (total)highest measured · range 7 to 29 · Wells / entry points · 2025 report, page 2 | 29 ppb | None set | 100 ppb | Below the legal limit |
| Copper90th percentile of homes tested, 0 over the action level · Customer taps · 2025 report, page 2 | 0.13 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range ND to 16 · Distribution system · 2025 report, page 2 | 11 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range ND to 79.1 · Distribution system · 2025 report, page 2 | 69 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · range 0.2 to 0.22 · Wells / entry points · 2025 report, page 2 | 0.22 ppm | 1 ppm | 4 ppm | Below the health goal |
| Nitrate (as N)highest measured · range 0.28 to 1.79 · sampled 2022 · Wells / entry points · 2025 report, page 2 | 1.79 ppm | 10 ppm | 10 ppm | Below the health goal |
| PFHxS (a PFAS)average · range ND to 4.5 · printed as 0.000424324 µg/L · sampled 2024 · Entry points (UCMR5) · 2025 report, page 3 | 0.42 ppt | None set | 10 ppt from 2029 | Below the legal limit |
| PFOS (a PFAS)average · range ND to 6.4 · printed as 0.000435135 µg/L · sampled 2024 · Entry points (UCMR5) · 2025 report, page 3 | 0.44 ppt | 1 ppt | 4 ppt from 2029 | Below the health goal |
| Seleniumhighest measured · range ND to 4.6 · Wells / entry points · 2025 report, page 2 | 4.6 ppb | 30 ppb | 50 ppb | Below the health goal |
| Lithiumaverage · range ND to 20.7 · sampled 2024 · Entry points (UCMR5) · 2025 report, page 3 | 12.4 ppb | None set | None | No health limit |
| Sodiumhighest measured · range 19 to 115 · Wells / entry points · 2025 report, page 3 | 115 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. 2 numbers we weren’t sure about are held back until a person checks.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in Edmond Pwa’s water between Apr 2024 and Jan 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFOS6.4 pptFound in 3 of 37 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFHxS4.5 pptFound in 4 of 37 samples · highest resultNo federal limit in force for this one
- PFBS4.7 pptFound in 3 of 37 samples · highest resultNo federal limit in force for this one
- Lithium20.7 ppbFound in 33 of 37 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.
Radium and uranium
Found: Gross alpha (radioactivity), Gross beta (radioactivity), Uranium
What removes it: Reverse osmosis.
Lead
Found: Lead
What removes it: Certified carbon block or RO.
Bacteria and viruses
Found: Total coliform bacteria
What removes it: UV purification (and tell your utility).
PFAS ("forever chemicals")
Found: PFOS (EPA testing)
What removes it: Reverse osmosis.
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