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Oakville Water Quality

Latest water quality information for Oakville, California

Last update on March 2025

Ok

Acceptable water with improvement potential.

Exceeds 0 EPA limits and 5 recommended standards.

Water Provider
napa, city of
Owner Type
L (Local Government)
Population Served
87,067
Data Sources
2008-2025

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.

Boron

81.20 ppm
162.4x
Recommended: 0.5000 ppm
Above health-based recommendations

Potential Health Effects

Reproductive issues

Bromodichloromethane

10.20 ppb
170.0x
Recommended: 0.0600 ppb
Above health-based recommendations

Potential Health Effects

Cancer

Chloroform

32.50 ppb
81.2x
Recommended: 0.4000 ppb
Above health-based recommendations

Potential Health Effects

Cancer

Dibromochloromethane

2.90 ppb
29.0x
Recommended: 0.1000 ppb
Above health-based recommendations

Potential Health Effects

Cancer

Total Thms

45.60 ppb
304.0x
Recommended: 0.1500 ppb
Above health-based recommendations

Potential Health Effects

Cancer

Other Detected Contaminants

Contaminant Detected Level EPA Limit Recommended Status
Calcium 11.60 ppm Not established 80 ppm Within limits
Chloride 13.70 ppm 250 ppm 250 ppm Within limits
Color 1.30 CU 15 CU 15 CU Within limits
Conductivity 383 µS/cm Not established 800 µS/cm Within limits
Copper 118 ppb 1300 ppb 300 ppb Within limits
Iron 156 ppb 300 ppb 300 ppb Within limits
Magnesium 12.20 ppm Not established 30 ppm Within limits
Manganese 5.60 ppb 50 ppb 50 ppb Within limits
Ph Level 5.90 pH units 8.50 pH units 8.50 pH units Within limits
Potassium 1.90 ppb Not established 5000 ppb Within limits
Silica 16.60 ppm Not established 25 ppm Within limits
Sodium 19.60 ppm Not established 20 ppm Within limits
Specific Conductivity 153 µmhos/cm Not established 800 µmhos/cm Within limits
Strontium 156 ppb Not established 1500 ppb Within limits
Sulfate 44.40 ppm 250 ppm 250 ppm Within limits
Total Dissolved Solids 149 ppm 500 ppm 500 ppm Within limits
Turbidity 0.3000 NTU 1 NTU 0.3000 NTU Within limits
Uranium 0.1000 ppb 30 ppb 0.4300 ppb Within limits
Zinc 211 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

Carbon filters are effective at removing many common contaminants including chlorine, sediment, volatile organic compounds (VOCs), and improves taste and odor.

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