EPA UCMR 5 Data · All States

PFAS Drinking Water Monitoring by State

EPA UCMR 5 drinking-water monitoring results linked to ZIP codes, summarized for 52 states and territories. Data updated: July 2026.

• Alabama — 408 ZIP codes, 50.2% at/above threshold
• Alaska — 31 ZIP codes, 87.1% at/above threshold
• Arizona — 276 ZIP codes, 20.3% at/above threshold
• Arkansas — 174 ZIP codes, 1.1% at/above threshold
• California — 1076 ZIP codes, 39.0% at/above threshold
• Colorado — 243 ZIP codes, 18.1% at/above threshold
• Connecticut — 164 ZIP codes, 98.2% at/above threshold
• Delaware — 54 ZIP codes, 77.8% at/above threshold
• District of Columbia — 270 ZIP codes, 0.0% at/above threshold
• Florida — 652 ZIP codes, 75.2% at/above threshold
• Georgia — 273 ZIP codes, 48.7% at/above threshold
• Hawaii — 30 ZIP codes, 16.7% at/above threshold
• Idaho — 61 ZIP codes, 9.8% at/above threshold
• Illinois — 493 ZIP codes, 18.9% at/above threshold
• Indiana — 281 ZIP codes, 33.1% at/above threshold
• Iowa — 511 ZIP codes, 6.8% at/above threshold
• Kansas — 213 ZIP codes, 3.3% at/above threshold
• Kentucky — 404 ZIP codes, 34.2% at/above threshold
• Louisiana — 372 ZIP codes, 6.5% at/above threshold
• Maine — 21 ZIP codes, 52.4% at/above threshold
• Maryland — 235 ZIP codes, 9.4% at/above threshold
• Massachusetts — 240 ZIP codes, 72.1% at/above threshold
• Michigan — 164 ZIP codes, 14.6% at/above threshold
• Minnesota — 179 ZIP codes, 9.5% at/above threshold
• Mississippi — 217 ZIP codes, 5.1% at/above threshold
• Missouri — 501 ZIP codes, 5.4% at/above threshold
• Montana — 38 ZIP codes, 10.5% at/above threshold
• Nebraska — 130 ZIP codes, 6.2% at/above threshold
• Nevada — 114 ZIP codes, 19.3% at/above threshold
• New Hampshire — 35 ZIP codes, 80.0% at/above threshold
• New Jersey — 471 ZIP codes, 91.9% at/above threshold
• New Mexico — 102 ZIP codes, 5.9% at/above threshold
• New York — 429 ZIP codes, 43.4% at/above threshold
• North Carolina — 492 ZIP codes, 62.4% at/above threshold
• North Dakota — 208 ZIP codes, 0.0% at/above threshold
• Ohio — 615 ZIP codes, 53.3% at/above threshold
• Oklahoma — 240 ZIP codes, 10.8% at/above threshold
• Oregon — 36 ZIP codes, 50.0% at/above threshold
• Pennsylvania — 640 ZIP codes, 59.5% at/above threshold
• Puerto Rico — 36 ZIP codes, 75.0% at/above threshold
• Rhode Island — 28 ZIP codes, 67.9% at/above threshold
• South Carolina — 232 ZIP codes, 79.7% at/above threshold
• South Dakota — 223 ZIP codes, 0.9% at/above threshold
• Tennessee — 269 ZIP codes, 33.1% at/above threshold
• Texas — 1356 ZIP codes, 27.6% at/above threshold
• Utah — 110 ZIP codes, 30.9% at/above threshold
• Vermont — 4 ZIP codes, 25.0% at/above threshold
• Virginia — 256 ZIP codes, 57.0% at/above threshold
• Washington — 176 ZIP codes, 51.1% at/above threshold
• West Virginia — 153 ZIP codes, 26.8% at/above threshold
• Wisconsin — 108 ZIP codes, 32.4% at/above threshold
• Wyoming — 26 ZIP codes, 11.5% at/above threshold

Only 1 ZIP code (96543, Andersen Air Force Base) is represented in the analytic dataset for Guam — not enough coverage to summarize meaningfully as a state-level page. The ZIP_TO_STATE crosswalk has been fixed so this ZIP is no longer silently dropped from the live map, but no static page is generated for it.