Menlo Park Water Quality

Latest water quality information for Menlo Park, California

Last update on March 2025

Very bad

Unsafe water with serious health risks.

Exceeds 1 EPA limits and 8 recommended standards.

Water Provider

city of east palo alto

Owner Type

L (Local Government)

Population Served

29,519

Data Sources

2012-2024

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 ppb

2.0x

EPA limits: 0.0500 ppb

Above EPA regulatory threshold

Potential 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

124.80 ppm

249.6x

Recommended: 0.5000 ppm

Above health-based recommendations

Potential Health Effects

Reproductive issues

Bromodichloromethane

1.30 ppb

21.7x

Recommended: 0.0600 ppb

Above health-based recommendations

Potential Health Effects

Cancer

Chloroform

25.10 ppb

62.8x

Recommended: 0.4000 ppb

Above health-based recommendations

Potential Health Effects

Cancer

Dibromochloropropane

0.1000 ppb

58.8x

Recommended: 0.001700 ppb

Above health-based recommendations

Potential Health Effects

Cancer

Sodium

45.80 ppm

2.3x

Recommended: 20 ppm

Above health-based recommendations

Potential Health Effects

Hypertension

Total Thms

27.70 ppb

184.7x

Recommended: 0.1500 ppb

Above health-based recommendations

Potential Health Effects

Cancer

Uranium

1 ppb

2.3x

Recommended: 0.4300 ppb

Above health-based recommendations

Potential Health Effects

Cancer, kidney damage

Other Detected Contaminants

Contaminant	Detected Level	EPA Limit	Recommended	Status
Aluminum	12.30 ppb	200 ppb	600 ppb	Within limits
Calcium	33.20 ppm	Not established	80 ppm	Within limits
Chloride	47.70 ppm	250 ppm	250 ppm	Within limits
Conductivity	156.50 µS/cm	Not established	800 µS/cm	Within limits
Copper	69.70 ppb	1300 ppb	300 ppb	Within limits
Fluoride	479.80 ppb	4000 ppb	2000 ppb	Within limits
Magnesium	10.80 ppm	Not established	30 ppm	Within limits
Manganese	3 ppb	50 ppb	50 ppb	Within limits
Molybdenum	6 ppb	Not established	40 ppb	Within limits
Nickel	6.90 ppb	Not established	70 ppb	Within limits
Ph Level	8.10 pH units	8.50 pH units	8.50 pH units	Within limits
Potassium	1.70 ppb	Not established	5000 ppb	Within limits
Specific Conductivity	70.50 µmhos/cm	Not established	800 µmhos/cm	Within limits
Strontium	304.50 ppb	Not established	1500 ppb	Within limits
Sulfate	33.70 ppm	250 ppm	250 ppm	Within limits
Total Dissolved Solids	274 ppm	500 ppm	500 ppm	Within limits
Trichlorofluoromethane	0.5000 ppb	Not established	1300 ppb	Within limits
Zinc	229.70 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.

Reverse Osmosis

Reverse osmosis systems can remove up to 99% of dissolved contaminants from water including heavy metals, fluoride, nitrates, and arsenic.