We read 10 results from Columbia Water Co’s 2025 water quality report. No results over a legal limit; 1 above a health goal or guideline.
Serves about 25,200 people · Water system ID PA7360123 · 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 |
|---|---|---|---|---|
| Lead90th percentile of homes tested, 0 over the action level · Customer taps · 2025 report, page 4 | 1 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal5x the health goal |
| Bariumas reported · sampled 2024 · Marietta Div. Lanc. side (102), highest of 3 sources · 2025 report, page 4 | 0.05 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorineas reported · range 1 to 1.3 · Distribution system · 2025 report, page 3 | 1.3 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of homes tested, 0 over the action level · Customer taps · 2025 report, page 4 | 0.11 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Cyanideas reported · sampled 2024 · Marietta Div. Lanc. side (102) · 2025 report, page 4 | 12 ppb | 150 ppb | 200 ppb | Below the health goal |
| Disinfection byproducts (HAA5)as reported · Distribution system · 2025 report, page 3 | 29.6 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)as reported · Distribution system · 2025 report, page 3 | 42.3 ppb | None set | 80 ppb | Below the legal limit |
| Turbidity (cloudiness)highest measured · Treatment plant · 2025 report, page 3 | 0.26 NTU | None set | 1 NTU | Below the legal limit |
| Hardnessaverage · System average · 2025 report, page 2 | 5.67 gpg (97 ppm) | — | — | Moderately hard |
| Sodiumaverage · System average · 2025 report, page 2 | 21.1 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. 3 numbers we weren’t sure about are 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: Lead
What removes it: Certified carbon block or RO.
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