Free Water Analysis
Water Utility

California Water Service Company - Westlake

Location Ventura County, California,
CA
Serves 19,512
Source Purchased surface water
PWS ID CA5610016

Overview

Legal does not necessarily equal safe.

  • Getting a passing grade from the federal government does not mean the water meets the latest health guidelines.
  • Legal limits for contaminants in tap water have not been updated in almost 20 years.
  • The best way to ensure clean tap water is to keep pollution out of source water in the first place.

AquaPura's analysis shows 16 contaminant(s) detected in California Water Service Company - Westlake's water exceed recommended health guidelines, though they may be within legal limits set by the EPA.

Contaminants Detected

Arsenic

Potential Effect: Over Legal Limit
↗
This Utility: 1.1 ppb Legal Limit: 10 ppb
275x
EWG's Health Guideline:
0.004 ppb
↗
This Utility: 1.71 ppb No Legal Limit
86x
EWG's Health Guideline:
0.02 ppb
↗
This Utility: 0.698 ppb No Legal Limit
12x
EWG's Health Guideline:
0.06 ppb

Bromodichloromethane

Potential Effect: cancer
↗
This Utility: 5.14 ppb No Legal Limit
86x
EWG's Health Guideline:
0.06 ppb
↗
This Utility: 9.31 ppb No Legal Limit
19x
EWG's Health Guideline:
0.5 ppb

Chloroform

Potential Effect: cancer
↗
This Utility: 2.39 ppb No Legal Limit
6x
EWG's Health Guideline:
0.4 ppb

Chromium (hexavalent)*

Potential Effect: cancer
↗
This Utility: 0.301 ppb No Legal Limit
15x
EWG's Health Guideline:
0.02 ppb
↗
This Utility: 3.87 ppb No Legal Limit
129x
EWG's Health Guideline:
0.03 ppb

Dibromochloromethane

Potential Effect: cancer
↗
This Utility: 10.1 ppb No Legal Limit
101x
EWG's Health Guideline:
0.1 ppb
↗
This Utility: 2.08 ppb No Legal Limit
10x
EWG's Health Guideline:
0.2 ppb

Haloacetic acids (HAA5)

Potential Effect: cancer
↗
This Utility: 36.2 ppb Legal Limit: 60 ppb
362x
EWG's Health Guideline:
0.1 ppb

Haloacetic acids (HAA9)*

Potential Effect: cancer
↗
This Utility: 9.23 ppb No Legal Limit
154x
EWG's Health Guideline:
0.06 ppb

Radon

Potential Effect: cancer
↗
This Utility: 258.72 ppb No Legal Limit
172x
EWG's Health Guideline:
1.5 ppb

Total trihalomethanes (TTHMs)

Potential Effect: cancer
↗
This Utility: 27 ppb Legal Limit: 80 ppb
180x
EWG's Health Guideline:
0.15 ppb

Trichloroacetic acid

Potential Effect: cancer
↗
This Utility: 1.03 ppb No Legal Limit
10x
EWG's Health Guideline:
0.1 ppb
↗
This Utility: 1.09 ppb Legal Limit: 20 ppb
2.5x
EWG's Health Guideline:
0.43 ppb
↗
This Utility: 42.9 ppb No Legal Limit
EWG's Health Guideline:
210 ppb
↗
This Utility: 1.33 ppb No Legal Limit
↗
This Utility: 0.323 ppb Legal Limit: 5 ppb
EWG's Health Guideline:
4 ppb
↗
This Utility: 0.683 ppm Legal Limit: 4 ppm
↗
This Utility: 12.6 ppb No Legal Limit
↗
This Utility: 0.925 ppb No Legal Limit
EWG's Health Guideline:
100 ppb
↗
This Utility: 4.46 ppb No Legal Limit
EWG's Health Guideline:
40 ppb
↗
This Utility: 0.125 ppb No Legal Limit
EWG's Health Guideline:
25 ppb
↗
This Utility: 1.07 ppb No Legal Limit
EWG's Health Guideline:
53 ppb

Nitrate

Potential Effect: cancer
↗
This Utility: 0.173 ppm Legal Limit: 10 ppm
EWG's Health Guideline:
0.14 ppm
↗
This Utility: 0.16 ppm Legal Limit: 10 ppm
EWG's Health Guideline:
0.14 ppm
↗
This Utility: 0.0128 ppm Legal Limit: 1 ppm
↗
This Utility: 2.65 ppb Legal Limit: 50 ppb
EWG's Health Guideline:
30 ppb
↗
This Utility: 0.491 ppb No Legal Limit
EWG's Health Guideline:
1500 ppb
↗
This Utility: 3.88 ppb No Legal Limit
EWG's Health Guideline:
21 ppb
↗
This Utility: 0.0318 ppb Legal Limit: 10000 ppb
EWG's Health Guideline:
1800 ppb

Find a Filter

See which water filtration technologies are effective at reducing the contaminants detected in this utility's water supply.

Carbon Filters
Filters 13 contaminants exceeding guidelines (+5 others)

Can reduce the levels of many common contaminants.

Pros
  • Lower upfront cost
  • Reduced maintenance
Cons
  • Does not remove all contaminants
Reverse Osmosis
Filters 15 contaminants exceeding guidelines (+13 others)

Can reduce the levels of many common contaminants.

Pros
  • Most effective
Cons
  • Higher upfront cost
  • Requires more maintenance
  • Wastes water
Other Considerations
Ion Exchange
PROS: Softens hard water, Reduces some contaminants
CONS: Doesn't remove all contaminants
Whole-House Filters
PROS: Useful for reducing radiologicals and TCE
CONS: Expensive to install and maintain, Risk of bacterial contamination

Explore filter options for each contaminant. See which technologies are effective at reducing specific contaminants.

Contaminant Activated Carbon Reverse Osmosis Ion Exchange
Contaminants Above Health Guidelines
Arsenic ✕ ✓ ✓
Bromochloroacetic acid ✓ ✓ ✕
Bromochloromethane ✓ ✓ ✕
Bromodichloromethane ✓ ✓ ✕
Bromoform ✓ ✓ ✕
Chloroform ✓ ✓ ✕
Chromium (hexavalent)* ✕ ✓ ✓
Dibromoacetic acid ✓ ✓ ✕
Dibromochloromethane ✓ ✓ ✕
Dichloroacetic acid ✓ ✓ ✕
Haloacetic acids (HAA5) ✓ ✓ ✕
Haloacetic acids (HAA9)* ✓ ✓ ✕
Radon ✓ ✓ ✕
Total trihalomethanes (TTHMs) ✓ ✓ ✕
Trichloroacetic acid ✓ ✓ ✕
Other Contaminants Detected
Chlorate* ✕ ✕ ✕
Dibromomethane ✓ ✓ ✕
Dichloromethane (methylene chloride) ✓ ✓ ✕
Fluoride ✕ ✓ ✕
Lithium ✕ ✓ ✓
Manganese ✕ ✕ ✓
Molybdenum ✕ ✓ ✓
Monobromoacetic acid* ✓ ✓ ✕
Monochloroacetic acid ✓ ✓ ✕
Nitrate ✕ ✓ ✓
Nitrate and nitrite ✕ ✓ ✓
Nitrite ✕ ✓ ✓
Selenium ✕ ✓ ✕
Strontium* ✕ ✓ ✓
Vanadium* ✕ ✕ ✓
Xylenes (total) ✓ ✓ ✕

Protect your family's health.

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