| Estero, FL | 51.9%±3.0 points | 37,858 | | Lee County Utilities○ Nohighest average PFOS 0.5 ppt12 samples, 2023Bonita Springs Utilities○ NoPFOA and PFOS not detected2 samples, 2023 to 2024 | Lee County Utilities○ No1.1 ppbmonitoring period 2023Bonita Springs Utilities○ No2.1 ppbmonitoring period 2023 | Lee County Utilities○ NoBonita Springs Utilities○ No | Lee County Utilities▲ Yes1 health-standard violationBonita Springs Utilities○ No |
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| Bonita Springs, FL | 44.2%±2.3 points | 55,904 | | ○ NoPFOA and PFOS not detected2 samples, 2023 to 2024 | ○ No2.1 ppbmonitoring period 2023 | ○ No | ○ No |
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| Prescott, AZ | 40.6%±2.0 points | 47,400 | Not matchedWe don't have a confident main utility for this place yet. | – No data | – No data | – No data | – No data |
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| Hilton Head Island, SC | 39.2%±2.2 points | 37,911 | Not matchedWe don't have a confident main utility for this place yet. | – No data | – No data | – No data | – No data |
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| Palm Desert, CA | 37.7%±1.9 points | 51,990 | Not matchedWe don't have a confident main utility for this place yet. | – No data | – No data | – No data | – No data |
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| Sebastian, FL | 36.8%±3.0 points | 26,262 | Not matchedWe don't have a confident main utility for this place yet. | – No data | – No data | – No data | – No data |
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| Oro Valley, AZ | 35.7%±2.1 points | 48,162 | | ○ NoPFOA and PFOS not detected27 samples, 2024 to 2025 | ○ No1 ppbmonitoring period 2023 to 2025 | ○ No | ○ No |
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| Palm Springs, CA | 35.3%±1.6 points | 45,070 | Not matchedWe don't have a confident main utility for this place yet. | – No data | – No data | – No data | – No data |
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| Dunedin, FL | 35.3%±2.5 points | 36,062 | | ○ NoPFOA and PFOS not detected2 samples, 2023 | ○ No1.5 ppbmonitoring period 2023 | ○ No | ○ No |
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| New Smyrna Beach, FL | 35.3%±2.5 points | 31,974 | Not matchedWe don't have a confident main utility for this place yet. | – No data | – No data | – No data | – No data |
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| Lake Havasu City, AZ | 35.2%±1.9 points | 58,359 | | ○ NoPFOA and PFOS not detected2 samples, 2025 | ○ No3.1 ppbmonitoring period 2021 to 2023 | ○ No | ○ No |
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| Bullhead City, AZ | 34.3%±2.3 points | 42,496 | Not matchedWe don't have a confident main utility for this place yet. | – No data | – No data | – No data | – No data |
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| Apache Junction, AZ | 34.0%±2.3 points | 41,058 | | ○ NoPFOA and PFOS not detected4 samples, 2024 | ○ No0 ppbmonitoring period 2023 to 2025 | ○ No | ○ No |
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| Ormond Beach, FL | 33.5%±2.4 points | 43,976 | Not matchedWe don't have a confident main utility for this place yet. | – No data | – No data | – No data | – No data |
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| Palm Beach Gardens, FLCity page | 32.5%±2.0 points | 60,959 | | ○ NoPFOA and PFOS not detected2 samples, 2024 | ○ No1.6 ppbmonitoring period 2025 | ○ No | ○ No |
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| La Quinta, CA | 31.6%±2.2 points | 38,707 | Not matchedWe don't have a confident main utility for this place yet. | – No data | – No data | – No data | – No data |
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| Bella Vista, AR | 31.6%±2.4 points | 31,697 | | ○ NoPFOA and PFOS not detected4 samples, 2023 to 2024 | ○ No1.5 ppbmonitoring period 2026 to 2028 | ○ No | ○ No |
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| Tarpon Springs, FL | 30.0%±3.4 points | 25,791 | Not matchedWe don't have a confident main utility for this place yet. | – No data | – No data | – No data | – No data |
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| Prescott Valley, AZ | 29.9%±1.9 points | 49,179 | | ○ NoPFOA and PFOS not detected38 samples, 2024 to 2025 | ○ No0 ppbmonitoring period 2024 to 2026 | ○ No | ○ No |
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| Walnut Creek, CA | 29.5%±1.6 points | 70,088 | Not matchedWe don't have a confident main utility for this place yet. | – No data | – No data | – No data | – No data |
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| Palm Coast, FLCity page | 29.5%±1.3 points | 98,258 | | ○ NoPFOA and PFOS not detected6 samples, 2025 | ○ No1.3 ppbmonitoring period 2025 | ○ No | ○ No |
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| Sarasota, FLCity page | 29.2%±1.6 points | 56,970 | | ○ NoPFOA and PFOS not detected2 samples, 2023 to 2024 | ○ No1 ppbmonitoring period 2025 | ○ No | ○ No |
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| Aiken, SC | 29.1%±2.3 points | 32,521 | | ○ NoPFOA and PFOS not detected12 samples, 2025 to 2026 | ○ No2.7 ppbmonitoring period 2024 to 2026 | ○ No | ▲ Yes1 health-standard violation |
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| Centerville, OH | 29.0%±2.5 points | 25,205 | Not matchedWe don't have a confident main utility for this place yet. | – No data | – No data | – No data | – No data |
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| Niles, IL | 28.5%±2.5 points | 30,064 | | ○ NoPFOA and PFOS not detected4 samples, 2025 | ○ No9.93 ppbmonitoring period 2026 | ○ No | ○ No |
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| Leland, NC | 28.4%±2.5 points | 29,607 | Not matchedWe don't have a confident main utility for this place yet. | – No data | – No data | – No data | – No data |
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| Leesburg, FL | 28.2%±2.6 points | 30,807 | | ▲ YesPFOS 4.4 ppt2 samples, 2023 to 2024 | ○ No1.8 ppbmonitoring period 2023 | ○ No | ○ No |
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| Bradenton, FL | 28.1%±1.7 points | 57,014 | Not matchedWe don't have a confident main utility for this place yet. | – No data | – No data | – No data | – No data |
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| Delray Beach, FLCity page | 28.0%±1.7 points | 67,979 | | ▲ YesPFOA 14.2 ppt; PFOS 28.7 ppt1 samples, 2023 | ○ No3.7 ppbmonitoring period 2025 | ○ No | ○ No |
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| Largo, FL | 28.0%±1.4 points | 82,617 | | ○ NoPFOA and PFOS not detected4 samples, 2023 to 2024 | – No data | – No data | ○ No |
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| Gloucester, MA | 27.9%±2.3 points | 30,075 | | ○ NoPFOA and PFOS not detected8 samples, 2023 to 2024 | ○ No3 ppbmonitoring period 2021 to 2023 | ○ No | ○ No |
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| North Port, FL | 27.7%±1.7 points | 84,605 | | ○ Nohighest average PFOA 1.2 ppt13 samples, 2024 | ○ No3.4 ppbmonitoring period 2025 | ○ No | ○ No |
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| Banning, CA | 27.7%±2.8 points | 31,093 | | ○ NoPFOA and PFOS not detected24 samples, 2023 to 2024 | ○ No0 ppbmonitoring period 2022 to 2024 | ○ No | ○ No |
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| Lincoln, CA | 27.0%±1.4 points | 52,956 | | ○ Nohighest average PFOS 0.5 ppt8 samples, 2024 to 2025 | ○ No0 ppbmonitoring period 2025 to 2027 | ○ No | ○ No |
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| Barnstable Town, MA | 26.8%±1.8 points | 49,568 | Not matchedWe don't have a confident main utility for this place yet. | – No data | – No data | – No data | – No data |
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| Rancho Palos Verdes, CA | 26.8%±2.0 points | 40,864 | Not matchedWe don't have a confident main utility for this place yet. | – No data | – No data | – No data | – No data |
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| Northbrook, IL | 26.6%±2.0 points | 34,585 | | ○ NoPFOA and PFOS not detected4 samples, 2023 to 2024 | ○ No11 ppbmonitoring period 2026 | ▲ Yes11 ppbmonitoring period 2026 | ○ No |
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| Cerritos, CA | 26.5%±1.7 points | 47,867 | | ○ Nohighest average PFOS 0.5 ppt10 samples, 2024 to 2025 | ○ No0 ppbmonitoring period 2026 to 2028 | ○ No | ○ No |
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| Saratoga, CA | 26.5%±2.2 points | 30,319 | Not matchedWe don't have a confident main utility for this place yet. | – No data | – No data | – No data | – No data |
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| Scottsdale, AZ | 26.4%±0.8 points | 243,821 | | ○ NoPFOA and PFOS not detected18 samples, 2025 | ○ No2.3 ppbmonitoring period 2021 to 2023 | ○ No | ○ No |
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| Paramus, NJ | 26.2%±2.3 points | 26,568 | Not matchedWe don't have a confident main utility for this place yet. | – No data | – No data | – No data | – No data |
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| Georgetown, TX | 26.2%±1.3 points | 85,999 | | ○ Nohighest average PFOS 0.7 ppt22 samples, 2023 to 2024 | ○ No4.81 ppbmonitoring period 2024 to 2026 | ○ No | ▲ Yes1 health-standard violation |
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| Santa Fe, NM | 26.2%±1.1 points | 89,019 | | ○ NoPFOA and PFOS not detected18 samples, 2023 to 2025 | ○ No1.1 ppbmonitoring period 2026 | ○ No | ▲ Yes1 health-standard violation (including 1 for a missed lead-pipe inventory filing, which EPA counts as a treatment-technique violation) |
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| Tamarac, FL | 25.9%±2.0 points | 73,019 | Not matchedWe don't have a confident main utility for this place yet. | – No data | – No data | – No data | – No data |
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| Wheeling, WV | 25.9%±1.8 points | 26,350 | | ○ NoPFOA and PFOS not detected4 samples, 2024 | ○ No0 ppbmonitoring period 2023 to 2025 | ○ No | ▲ Yes2 health-standard violations |
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| Aventura, FL | 25.8%±2.1 points | 39,885 | Not matchedWe don't have a confident main utility for this place yet. | – No data | – No data | – No data | – No data |
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| Chesterfield, MO | 25.5%±1.6 points | 49,574 | Not matchedWe don't have a confident main utility for this place yet. | – No data | – No data | – No data | – No data |
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| Glenview, IL | 25.5%±1.7 points | 47,752 | | ○ NoPFOA and PFOS not detected4 samples, 2024 to 2025 | ○ No10 ppbmonitoring period 2026 | ○ No | ○ No |
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| Bethel Park, PA | 25.5%±2.1 points | 32,881 | Not matchedWe don't have a confident main utility for this place yet. | – No data | – No data | – No data | – No data |
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| Beverly Hills, CA | 25.4%±2.3 points | 31,624 | | ○ NoPFOA and PFOS not detected6 samples, 2023 to 2024 | ○ No0 ppbmonitoring period 2024 | ○ No | ○ No |
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