PFAS · Kansas
PFAS in Kansas drinking water: EPA’s final survey results
EPA’s national PFAS survey (UCMR 5) tested 102 of the community water systems that serve homes in Kansas. 34 found at least one of 29 PFAS above the laboratory reporting level, and 3 had a PFOA or PFOS sampling-location yearly average at or above EPA’s 4.0 ppt limit. Samples were collected from January 2023 to May 2026.
Data as of EPA UCMR 5 final release, August 2026 (file dated Aug 28, 2026) · EPA SDWIS 2026Q2 (file dated Jul 9, 2026). How we build these pages
PFBA was the compound Kansas community systems found most often: 19 of 102 tested systems measured it above the reporting level. Across the country, 35% of surveyed community systems found at least one PFAS; in Kansas the share is 33%. The largest Kansas system with a detection, Water District 1 of Johnson Co, serves 490,000 people and found 1 of the 29 compounds.
Which PFAS were found most often in Kansas
Each row counts the Kansas community water systems where that compound was measured above the reporting level at least once. A detection is a measurement, not a violation: most of these compounds have no federal limit.
| Compound | Systems where found | Systems tested | Share |
|---|---|---|---|
| PFBA | 19 | 102 | 19% |
| PFBS | 12 | 102 | 12% |
| PFHxS | 9 | 102 | 9% |
| PFPeA | 9 | 102 | 9% |
| PFHxA | 8 | 102 | 8% |
| PFOS | 6 | 102 | 6% |
| 6:2 FTS | 3 | 102 | 3% |
| PFOA | 2 | 102 | 2% |
| PFPeS | 2 | 102 | 2% |
| PFHpA | 1 | 102 | 1% |
| PFNA | 1 | 102 | 1% |
Kansas systems with the most PFAS found
The 10 surveyed community water systems that found the most different PFAS, with PFOA and PFOS compared to EPA’s 4.0 ppt limits on the yearly average at the highest sampling location. Larger systems come first when counts tie.
| Water system | People served | PFAS found (of 29) | PFOA | PFOS |
|---|---|---|---|---|
| Great Bend, City of KS2000911 | 14,580 | 10 | 2.6 ppt below the MCL | 8.0 ppt at or above the MCL |
| Frusi Water Treatment Plant KS2006114 | 35,784 | 7 | 14.1 ppt at or above the MCL | 4.4 ppt at or above the MCL |
| Pratt, City of KS2015103 | 6,573 | 6 | — not detected above the reporting level | 0.0 ppt below the MCL |
| Park City, City of KS2017303 | 8,503 | 5 | — not detected above the reporting level | 2.1 ppt below the MCL |
| Hays, City of KS2005111 | 21,040 | 4 | — not detected above the reporting level | — not detected above the reporting level |
| Salina, City of KS2016914 | 46,481 | 3 | — not detected above the reporting level | — not detected above the reporting level |
| Paola, City of KS2012103 | 5,786 | 3 | — not detected above the reporting level | — not detected above the reporting level |
| Hugoton, City of KS2018901 | 3,764 | 3 | — not detected above the reporting level | — not detected above the reporting level |
| Lawrence, City of KS2004503 | 95,256 | 2 | — not detected above the reporting level | — not detected above the reporting level |
| Dodge City, City of KS2005710 | 27,104 | 2 | — not detected above the reporting level | 6.7 ppt at or above the MCL |
Counties with the most systems that found PFAS
- Johnson County 4 of 5 surveyed systems
- Miami County 4 of 4 surveyed systems
- Sedgwick County 3 of 11 surveyed systems
- Douglas County 3 of 6 surveyed systems
- Shawnee County 3 of 4 surveyed systems
- Sumner County 2 of 2 surveyed systems
- Geary County 1 of 2 surveyed systems
- Saline County 1 of 1 surveyed systems