Arroyo Grande Water Quality
Latest water quality information for Arroyo Grande, California
Last update on March 2025
Acceptable water with improvement potential.
Exceeds 0 EPA limits and 10 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.
Good news! No contaminants were found to exceed EPA limits.
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.
Arsenic
1.80 ppbPotential Health Effects
Cancer
Boron
62.30 ppmPotential Health Effects
Reproductive issues
Bromodichloromethane
10.70 ppbPotential Health Effects
Cancer
Bromoform
2.20 ppbPotential Health Effects
Cancer
Chloroform
13.40 ppbPotential Health Effects
Cancer
Dibromochloromethane
7.70 ppbPotential Health Effects
Cancer
Magnesium
32.30 ppmPotential Health Effects
Diarrhea
Sodium
40.20 ppmPotential Health Effects
Hypertension
Total Thms
33.20 ppbPotential Health Effects
Cancer
Uranium
1.70 ppbPotential Health Effects
Cancer, kidney damage
Other Detected Contaminants
| Contaminant | Detected Level | EPA Limit | Recommended | Status |
|---|---|---|---|---|
| Calcium | 71.10 ppm | Not established | 80 ppm | Within limits |
| Chloride | 48.90 ppm | 250 ppm | 250 ppm | Within limits |
| Cobalt | 0.7000 ppb | Not established | 70 ppb | Within limits |
| Color | 2.10 CU | 15 CU | 15 CU | Within limits |
| Conductivity | 663.30 µS/cm | Not established | 800 µS/cm | Within limits |
| Fluoride | 312.50 ppb | 4000 ppb | 2000 ppb | Within limits |
| Manganese | 3.90 ppb | 50 ppb | 50 ppb | Within limits |
| Molybdenum | 12.70 ppb | Not established | 40 ppb | Within limits |
| Odor | 1.70 TON | 3 TON | 3 TON | Within limits |
| Ph Level | 8 pH units | 8.50 pH units | 8.50 pH units | Within limits |
| Potassium | 3.50 ppb | Not established | 5000 ppb | Within limits |
| Strontium | 319.20 ppb | Not established | 1500 ppb | Within limits |
| Sulfate | 111.20 ppm | 250 ppm | 250 ppm | Within limits |
| Total Dissolved Solids | 432.90 ppm | 500 ppm | 500 ppm | Within limits |
| Turbidity | 0.2000 NTU | 1 NTU | 0.3000 NTU | Within limits |
| Zinc | 190.60 ppb | 5000 ppb | 5000 ppb | Within limits |
| No additional contaminants detected. | ||||
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