What was found in Klamath Falls's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 1362 µg/L 14% of the EPA limit 10000 µg/L Main supplier: KLAMATH FALLS WATER DEPT · 40,475 people · 2019
Highest in the city: 4100 µg/L — OREGON WATER UTILITIES - MOUNTAIN LAKES · 770 people · 2019 | 15/15 | SYR4 |
| Nitrate-Nitrite | 378.9 µg/L 3.8% of the EPA limit 10000 µg/L Main supplier: KLAMATH FALLS WATER DEPT · 40,475 people · 2019
Highest in the city: 4100 µg/L — OREGON WATER UTILITIES - MOUNTAIN LAKES · 770 people · 2018 | 8/15 | SYR4 |
| Fluoride | 1320 µg/L 33% of the EPA limit 4000 µg/L Highest in the city: ROUND LAKE WATER UTILITIES · 250 people · 2019 | 2/15 | SYR4 |
| Nitrite | 157 µg/L 16% of the EPA limit 1000 µg/L Highest in the city: FALCON HEIGHTS · 559 people · 2019 | 2/15 | SYR4 |
| Copper | 93.385 µg/L 7.2% of the EPA limit 1300 µg/L Main supplier: KLAMATH FALLS WATER DEPT · 40,475 people · 2017
Highest in the city: 117.4 µg/L — SKYLINE VIEW DIST IMPROVEMENT · 250 people · 2018 | 12/15 | SYR4 |
| Barium | 1.22 µg/L 0.1% of the EPA limit 2000 µg/L Main supplier: KLAMATH FALLS WATER DEPT · 40,475 people · 2019
Highest in the city: 54.164 µg/L — CROSSROADS MOBILE HOME PARK · 150 people · 2019 | 6/15 | SYR4 |
| Total Haloacetic Acids (HAA5) | 11.7 µg/L 19% of the EPA limit 60 µg/L Main supplier: KLAMATH FALLS WATER DEPT · 40,475 people · 2019 | 1/15 | SYR4 |
| Arsenic | 7.373 µg/L 74% of the EPA limit 10 µg/L Main supplier: KLAMATH FALLS WATER DEPT · 40,475 people · 2019 | 9/15 | SYR4 |
| Lead | 1.1325 µg/L 7.6% of the EPA limit 15 µg/L Main supplier: KLAMATH FALLS WATER DEPT · 40,475 people · 2017
Highest in the city: 6.6 µg/L — SKYLINE VIEW DIST IMPROVEMENT · 250 people · 2018 | 12/15 | SYR4 |
| Gross Alpha, Excl. Radon And U | 5.41 pCi/L 36% of the EPA limit 15 pCi/L Highest in the city: CROSSROADS MOBILE HOME PARK · 150 people · 2014 | 5/15 | SYR4 |
| TTHM | 4.46 µg/L 5.6% of the EPA limit 80 µg/L Main supplier: KLAMATH FALLS WATER DEPT · 40,475 people · 2019
Highest in the city: 5.01 µg/L — ROUND LAKE WATER UTILITIES · 250 people · 2017 | 5/15 | SYR4 |
| Combined Radium (-226 And -228) | 2.3 pCi/L 46% of the EPA limit 5 pCi/L Highest in the city: COLLIER LANE HOA · 60 people · 2019 | 2/15 | SYR4 |
| Chromium | 1.58 µg/L 1.6% of the EPA limit 100 µg/L Highest in the city: ROUND LAKE WATER UTILITIES · 250 people · 2019 | 2/15 | SYR4 |
| Selenium | 0.8340 µg/L 1.7% of the EPA limit 50 µg/L Highest in the city: CROSSROADS MOBILE HOME PARK · 150 people · 2019 | 3/15 | SYR4 |
| Combined Uranium | 0.2000 µg/L 0.7% of the EPA limit 30 µg/L Highest in the city: ROUND LAKE WATER UTILITIES · 250 people · 2019 | 1/15 | SYR4 |
| PFOS | 0.0095 µg/L No EPA limit set Main supplier: KLAMATH FALLS WATER DEPT · 40,475 people · 2024 | 1/15 | UCMR-5 |
| PFHXS | 0.0058 µg/L No EPA limit set Main supplier: KLAMATH FALLS WATER DEPT · 40,475 people · 2024 | 1/15 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: KLAMATH FALLS WATER DEPT · 40,475 people · 2024
Highest in the city: 0.0043 mg/L — FALCON HEIGHTS · 559 people · 2023 | 15/15 | LCR |
| PFBS | 0.0043 µg/L No EPA limit set Main supplier: KLAMATH FALLS WATER DEPT · 40,475 people · 2024 | 1/15 | UCMR-5 |
Each bar shows the measured level as a share of the EPA limit: green is
well under, amber is close to it, red is over. For lead and copper the
limit applies to exactly the 90th-percentile figure shown, so red there
means a real exceedance. For everything else the limit applies to a
running annual average while the figure is the 95th percentile of the
system's samples — over 100% is worth reading, but is not by itself a
violation.
Formal violations are listed separately.
These are the utilities' own EPA-reported results, not a city-wide
average. A detection means the lab measured the
substance — it isn't the same as exceeding a legal limit. Hover a source
tag to see the EPA program and years behind each figure.
Water suppliers serving Klamath Falls
| Supplier | Population served |
|---|---|
| KLAMATH FALLS WATER DEPT | 40,475 |
| OREGON WATER UTILITIES - MOUNTAIN LAKES | 770 |
| FALCON HEIGHTS | 559 |
| ROUND LAKE WATER UTILITIES | 250 |
| SKYLINE VIEW DIST IMPROVEMENT | 250 |
| OREGON WATER UTILITIES - SOUTHVIEW | 250 |
| PINE GROVE WATER DIST (KLAMATH) | 180 |
| CROSSROADS MOBILE HOME PARK | 150 |
| RIDGEWATER WATER SYSTEM | 80 |
| OREGON WATER UTILITIES-PINECREST | 78 |
| SHIELD CREST WATER ASSN | 65 |
| COLLIER LANE HOA | 60 |
| SHIELD CREST CONDOS | 45 |
| COVE PARTNERSHIP | 40 |
| KLAMATH CO PROJECT HOMEFRONT | 37 |
Frequently asked questions about Klamath Falls tap water
Is Klamath Falls tap water safe to drink?
EPA testing detected 19 contaminants in the water serving Klamath Falls. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Klamath Falls?
15 public water suppliers report drinking-water monitoring for Klamath Falls, Oregon to the EPA. Each is listed above with its population served.
What contaminants are in Klamath Falls's water?
The contaminants EPA monitoring detected in Klamath Falls include Nitrate, Nitrate-Nitrite, Fluoride, Nitrite, Copper. The full list, with the level at the main supplier and the data source, is in the table above.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.