| Fluoride | 434 ppbaverage of all sampleshighest sample 630 ppbdetected in 12 of 14 samples | 4,000 ppb | None published | 2018-2021 |
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| Nitrate | 50.3 ppbaverage of all sampleshighest sample 140 ppbdetected in 3 of 7 samples | 10,000 ppb | None published | 2018-2021 |
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| Haloacetic acids (HAA9) | 37.4 ppbaverage of all sampleshighest sample 61.4 ppbdetected in 17 of 18 samples | No federal limit | None published | 2018-2019 |
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| Nitrite | 33.3 ppbaverage of all sampleshighest sample 180 ppbdetected in 2 of 7 samples | 1,000 ppb | None published | 2018-2021 |
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| Haloacetic acids (HAA5) | 30.3 ppbaverage of all sampleshighest sample 120 ppbdetected in 121 of 136 samples | 60 ppb | None published | 2018-2022 |
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| 6:2 FTSA | 25.6 pptaverage of all sampleshighest sample 91.1 pptdetected in 2 of 6 samples | No federal limit | None published | 2023-2024 |
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| Dichloroacetic acid | 19.2 ppbaverage of all sampleshighest sample 50.1 ppbdetected in 68 of 74 samples | Counts toward the 60 ppb limit for haloacetic acids (HAA5) | None published | 2020-2022 |
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| Total trihalomethanes (TTHMs) | 17.6 ppbaverage of all sampleshighest sample 197 ppbdetected in 107 of 135 samples | 80 ppb | None published | 2018-2022 |
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| PFPeA | 13.5 pptaverage of all sampleshighest sample 36.9 pptdetected in 4 of 6 samples | No federal limit | None published | 2023-2024 |
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| PFHxA | 12.8 pptaverage of all sampleshighest sample 35.2 pptdetected in 4 of 6 samples | No federal limit | None published | 2023-2024 |
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| PFBA | 9.42 pptaverage of all sampleshighest sample 19.1 pptdetected in 4 of 6 samples | No federal limit | None published | 2023-2024 |
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| Trichloroacetic acid | 7.46 ppbaverage of all sampleshighest sample 25.8 ppbdetected in 63 of 73 samples | Counts toward the 60 ppb limit for haloacetic acids (HAA5) | None published | 2020-2022 |
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| PFHpA | 4.78 pptaverage of all sampleshighest sample 14.7 pptdetected in 2 of 6 samples | No federal limit | None published | 2023-2024 |
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| PFOAEPA's 2024 rule sets a limit of 4.0 ppt; water systems must meet it by April 2029. In May 2026 EPA proposed allowing extensions to April 2031. EPA's goal (MCLG) is zero. | 3 pptaverage of all sampleshighest sample 10.2 pptdetected in 2 of 6 samples | 4 ppt | None published | 2023-2024 |
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| PFBS | 2.72 pptaverage of all sampleshighest sample 5.1 pptdetected in 4 of 6 samples | No federal limit | 2,000 ppt | 2023-2024 |
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| Monochloroacetic acid | 2.16 ppbaverage of all sampleshighest sample 11.3 ppbdetected in 42 of 74 samples | Counts toward the 60 ppb limit for haloacetic acids (HAA5) | None published | 2020-2022 |
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| PFHxSEPA set a limit in 2024 and proposed withdrawing it in May 2026. | 2.02 pptaverage of all sampleshighest sample 6.5 pptdetected in 2 of 6 samples | 10 ppt | None published | 2023-2024 |
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| Dibromoacetic acid | 1.85 ppbaverage of all sampleshighest sample 5.52 ppbdetected in 58 of 74 samples | Counts toward the 60 ppb limit for haloacetic acids (HAA5) | None published | 2020-2022 |
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| Monobromoacetic acid | 0.92 ppbaverage of all sampleshighest sample 5.03 ppbdetected in 45 of 74 samples | Counts toward the 60 ppb limit for haloacetic acids (HAA5) | None published | 2020-2022 |
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| 8:2 FTSA | 0.92 pptaverage of all sampleshighest sample 5.5 pptdetected in 1 of 6 samples | No federal limit | None published | 2023-2024 |
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| Manganese | 0.75 ppbaverage of all sampleshighest sample 3 ppbdetected in 1 of 4 samples | No federal limit | None published | 2019-2021 |
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| PFNAEPA set a limit in 2024 and proposed withdrawing it in May 2026. | 0.72 pptaverage of all sampleshighest sample 4.3 pptdetected in 1 of 6 samples | 10 ppt | None published | 2023-2024 |
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| Barium | 0.23 ppbaverage of all sampleshighest sample 1.4 ppbdetected in 1 of 6 samples | 2,000 ppb | None published | 2019-2021 |
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| Copper | 0.18 ppbaverage of all sampleshighest sample 1.1 ppbdetected in 1 of 6 samplesMeasured where water enters the distribution system, not at the tap. EPA's action level applies to tap samples. | 1,300 ppb (EPA action level, 90th percentile) | None published | 2019-2021 |
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| Aluminum* | 3.93 ppbaverage of all sampleshighest sample 5 ppbdetected in 3 of 3 samples | No federal limit | None published | 2020 |
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| Selenium* | 0.6 ppbaverage of all sampleshighest sample 1 ppbdetected in 2 of 3 samples | 50 ppb | None published | 2020 |
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| Uranium* | 0.49 ppbaverage of all sampleshighest sample 1.47 ppbdetected in 1 of 3 samples | 30 ppb | None published | 2020 |
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| Radium-226* | 0.13 pCi/Laverage of all sampleshighest sample 0.4 pCi/Ldetected in 1 of 3 samples | Counts toward the combined 5 pCi/L limit for radium-226 and radium-228 | None published | 2020 |
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