Modesto Water Quality
Latest water quality information for Modesto, California
Last update on March 2025
Unsafe water with serious health risks.
Exceeds 2 EPA limits and 11 recommended standards.
Contaminants exceeding EPA limits
What it means: This refers to substances in the water that are found at levels higher than what the EPA allows. The EPA (Environmental Protection Agency) is a U.S. government agency that sets legal limits for harmful contaminants to protect public health. Exceeding these limits means the water may pose health risks based on federal safety standards.
Pentachlorophenol
1.10 ppbPotential Health Effects
Cancer
Turbidity
1.10 NTUPotential Health Effects
Infection risk
Contaminants exceeding recommended standards
What it means: This refers to substances in the water that are above health-based guidelines set by organizations such as the World Health Organization (WHO) and the U.S. Environmental Protection Agency (EPA). These standards, while not always legally enforceable, are based on scientific research to protect health. Exceeding them may indicate potential health concerns.
Atrazine
0.4000 ppbPotential Health Effects
Endocrine disruption
Bromodichloromethane
1.20 ppbPotential Health Effects
Cancer
Bromoform
0.7000 ppbPotential Health Effects
Cancer
Chloroform
12.30 ppbPotential Health Effects
Cancer
Dibromochloromethane
0.8000 ppbPotential Health Effects
Cancer
Lead
1.50 ppbPotential Health Effects
Neurotoxicity
Lead Level
1.50 ppbPotential Health Effects
Neurotoxicity
Total Thms
14.90 ppbPotential Health Effects
Cancer
Trichloroethylene
0.6000 ppbPotential Health Effects
Cancer, neurotoxicity
Other Detected Contaminants
| Contaminant | Detected Level | EPA Limit | Recommended | Status |
|---|---|---|---|---|
| Aluminum | 10.30 ppb | 200 ppb | 600 ppb | Within limits |
| Calcium | 12.80 ppm | Not established | 80 ppm | Within limits |
| Chlorate | 170 ppb | Not established | 210 ppb | Within limits |
| Chloride | 245.40 ppm | 250 ppm | 250 ppm | Within limits |
| Conductivity | 145.60 µS/cm | Not established | 800 µS/cm | Within limits |
| Gross Alpha Activity | 8.40 pCi/L | 15 pCi/L | 15 pCi/L | Within limits |
| Hexachlorocyclopentadiene | 1 ppb | 50 ppb | 2 ppb | Within limits |
| Magnesium | 3 ppm | Not established | 30 ppm | Within limits |
| Molybdenum | 0.1000 ppb | Not established | 40 ppb | Within limits |
| Ph Level | 7.50 pH units | 8.50 pH units | 8.50 pH units | Within limits |
| Potassium | 2.40 ppb | Not established | 5000 ppb | Within limits |
| Sodium | 16.30 ppm | Not established | 20 ppm | Within limits |
| Strontium | 146.10 ppb | Not established | 1500 ppb | Within limits |
| Sulfate | 12.60 ppm | 250 ppm | 250 ppm | Within limits |
| Total Dissolved Solids | 216.70 ppm | 500 ppm | 500 ppm | Within limits |
| Trichlorofluoromethane | 2.20 ppb | Not established | 1300 ppb | Within limits |
| Zinc | 35.10 ppb | 5000 ppb | 5000 ppb | Within limits |
| No additional contaminants detected. | ||||
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