We read 3 results from Klamath Falls Water Dept’s 2025 water quality report. No results over a legal limit; 1 above a health goal or guideline.
Serves about 40,475 people · Water system ID OR4100443 · 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 |
|---|---|---|---|---|
| PFOS (a PFAS)highest measured · range 4.7 to 9.5 · printed as 0.0000095 mg/L · Balsam Well · 2025 report, page 2 | 9.5 ppt | 1 ppt | 4 ppt from 2029 | Above the federal limit that takes effect in 20292.4x 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. |
| Copper90th percentile of homes tested, 0 over the action level · listed as a violation in the report · Customer taps · 2025 report, page 2 | 0.03 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Lead90th percentile of homes tested, 0 over the action level · listed as a violation in the report · printed as 0.000 ppm · Customer taps · 2025 report, page 2 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
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 Klamath Falls Water Dept’s water between Mar 2024 and Sep 2024. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFOS9.5 pptFound in 2 of 12 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFHxS5.8 pptFound in 2 of 12 samples · highest resultNo federal limit in force for this one
- PFBS4.3 pptFound in 2 of 12 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.
PFAS ("forever chemicals")
Found: PFOS (a PFAS), PFOS (EPA testing)
What removes it: Reverse osmosis.
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