| Arsenic | 0.09 ppb. average of all samples highest sample 0.4 ppb detected in 2 of 8 samples | 0.004 ppb (California OEHHA 2004) | 10 ppb | 22× the health guideline |
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| Fluoride | 646 ppb. average of all samples highest sample 796 ppb detected in 35 of 35 samples | None published | 4,000 ppb | Not above its guideline, or no guideline |
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| Total trihalomethanes (TTHMs) | 12.1 ppb. average of all samples highest sample 139 ppb detected in 125 of 190 samples | None published | 80 ppb | Not above its guideline, or no guideline |
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| Radium-226 + Radium-228 | 0.61 pCi/L. sum of the radium-226 and radium-228 averages | None published | 5 pCi/L | Not above its guideline, or no guideline |
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| Haloacetic acids (HAA5) | 6.85 ppb. average of all samples highest sample 48 ppb detected in 144 of 185 samples | None published | 60 ppb | Not above its guideline, or no guideline |
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| Gross alpha | 0.35 pCi/L. average of all samples highest sample 1.5 pCi/L detected in 2 of 8 samples | None published | 15 pCi/L | Not above its guideline, or no guideline |
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| Nitrate | 192 ppb. average of all samples highest sample 760 ppb detected in 16 of 20 samples | None published | 10,000 ppb | Not above its guideline, or no guideline |
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| Barium | 0.93 ppb. average of all samples highest sample 4.4 ppb detected in 2 of 8 samples | None published | 2,000 ppb | Not above its guideline, or no guideline |
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| Nitrite | 0.3 ppb. average of all samples highest sample 3 ppb detected in 2 of 20 samples | None published | 1,000 ppb | Not above its guideline, or no guideline |
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| Aluminum | 15.5 ppb. average of all samples highest sample 90 ppb detected in 7 of 8 samples | None published | No federal limit | Not above its guideline, or no guideline |
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| Copper | 0.54 ppb. average of all samples highest sample 3 ppb detected in 2 of 8 samples Measured where water enters the distribution system, not at the tap. EPA's action level applies to tap samples. |
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