National City Water Quality
Latest water quality information for National City, California
Last update on March 2025
Unsafe water with serious health risks.
Exceeds 1 EPA limits and 16 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.
Ethylene Dibromide
0.1000 ppbPotential Health Effects
Cancer
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.
Boron
59.20 ppmPotential Health Effects
Reproductive issues
Bromochloromethane
0.8000 ppbPotential Health Effects
Possible organ damage
Bromodichloromethane
7.60 ppbPotential Health Effects
Cancer
Bromoform
4.10 ppbPotential Health Effects
Cancer
Chloroform
4.90 ppbPotential Health Effects
Cancer
Cobalt
415 ppbPotential Health Effects
Cardiovascular effects
Conductivity
1092.90 µS/cmPotential Health Effects
None
Dibromochloromethane
9.10 ppbPotential Health Effects
Cancer
Dibromochloropropane
0.1000 ppbPotential Health Effects
Cancer
Dibromomethane
0.8000 ppbPotential Health Effects
Organ damage
Lead
1.10 ppbPotential Health Effects
Neurotoxicity
Lead Level
1.10 ppbPotential Health Effects
Neurotoxicity
Sodium
72.50 ppmPotential Health Effects
Hypertension
Total Thms
24.50 ppbPotential Health Effects
Cancer
Uranium
1.60 ppbPotential Health Effects
Cancer, kidney damage
Other Detected Contaminants
| Contaminant | Detected Level | EPA Limit | Recommended | Status |
|---|---|---|---|---|
| Calcium | 27.80 ppm | Not established | 80 ppm | Within limits |
| Chloride | 103.90 ppm | 250 ppm | 250 ppm | Within limits |
| Color | 1.10 CU | 15 CU | 15 CU | Within limits |
| Fluoride | 308.40 ppb | 4000 ppb | 2000 ppb | Within limits |
| Magnesium | 13.30 ppm | Not established | 30 ppm | Within limits |
| Molybdenum | 4.10 ppb | Not established | 40 ppb | Within limits |
| Ph Level | 5.90 pH units | 8.50 pH units | 8.50 pH units | Within limits |
| Potassium | 2.40 ppb | Not established | 5000 ppb | Within limits |
| Specific Conductivity | 559.60 µmhos/cm | Not established | 800 µmhos/cm | Within limits |
| Strontium | 433.60 ppb | Not established | 1500 ppb | Within limits |
| Sulfate | 70.90 ppm | 250 ppm | 250 ppm | Within limits |
| Total Dissolved Solids | 335.80 ppm | 500 ppm | 500 ppm | Within limits |
| Zinc | 19.80 ppb | 5000 ppb | 5000 ppb | Within limits |
| No additional contaminants detected. | ||||
How to best protect from water pollution?
Reduce your water pollution exposure in California
Carbon Filter
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