Water Utility

Golden State Water Company (GSWC) - Southwest

Location Southwest, California,
CA
Serves 275,369
Source Purchased surface water
PWS ID CA1910155

Overview

Contaminants Detected

Arsenic

Potential Effect: Over Legal Limit
This Utility: 0.446 ppb Legal Limit: 10 ppb
112x
EWG's Health Guideline:
0.004 ppb

Bromodichloromethane

Potential Effect: cancer
This Utility: 7.33 ppb No Legal Limit
122x
EWG's Health Guideline:
0.06 ppb
This Utility: 4.69 ppb No Legal Limit
9.4x
EWG's Health Guideline:
0.5 ppb

Chloroform

Potential Effect: cancer
This Utility: 6.94 ppb No Legal Limit
17x
EWG's Health Guideline:
0.4 ppb
This Utility: 1.76 ppb No Legal Limit
59x
EWG's Health Guideline:
0.03 ppb

Dibromochloromethane

Potential Effect: cancer
This Utility: 8.98 ppb No Legal Limit
90x
EWG's Health Guideline:
0.1 ppb
This Utility: 3.06 ppb No Legal Limit
15x
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: 15.1 ppb No Legal Limit
252x
EWG's Health Guideline:
0.06 ppb

Nitrate

Potential Effect: cancer
This Utility: 0.281 ppm Legal Limit: 10 ppb
2x
EWG's Health Guideline:
0.14 ppb
This Utility: 0.287 ppm Legal Limit: 10 ppb
2x
EWG's Health Guideline:
0.14 ppb

Total trihalomethanes (TTHMs)

Potential Effect: cancer
This Utility: 28 ppb Legal Limit: 80 ppb
186x
EWG's Health Guideline:
0.15 ppb

Trichloroacetic acid

Potential Effect: cancer
This Utility: 1.6 ppb No Legal Limit
16x
EWG's Health Guideline:
0.1 ppb
This Utility: 77.5 ppb No Legal Limit
EWG's Health Guideline:
600 ppb
This Utility: 18.5 ppb Legal Limit: 2000 ppb
EWG's Health Guideline:
700 ppb
This Utility: 0.135 ppb No Legal Limit
This Utility: 148.4 ppb No Legal Limit
EWG's Health Guideline:
210 ppb
This Utility: 0.978 ppb No Legal Limit
EWG's Health Guideline:
2.69 ppb

Chromium (hexavalent)*

Potential Effect: cancer
This Utility: 0.0209 ppb No Legal Limit
EWG's Health Guideline:
0.02 ppb
This Utility: 0.477 ppm Legal Limit: 4 ppm
This Utility: 10.3 ppb No Legal Limit
This Utility: 2.9 ppb No Legal Limit
EWG's Health Guideline:
100 ppb
This Utility: 3.35 ppb No Legal Limit
EWG's Health Guideline:
40 ppb

Radium, combined (-226 and -228)

Potential Effect: cancer
This Utility: 0.07 ppb Legal Limit: 5 ppb
EWG's Health Guideline:
0.05 ppb
This Utility: 0.539 ppb No Legal Limit
EWG's Health Guideline:
1500 ppb
This Utility: 0.31 ppb Legal Limit: 20 ppb
EWG's Health Guideline:
0.43 ppb
This Utility: 0.767 ppb No Legal Limit
EWG's Health Guideline:
21 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 10 contaminants exceeding guidelines (+2 others)

Can reduce the levels of many common contaminants.

Pros
  • Lower upfront cost
  • Reduced maintenance
Cons
  • Does not remove all contaminants
Reverse Osmosis
Filters 13 contaminants exceeding guidelines (+10 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
Bromodichloromethane
Bromoform
Chloroform
Dibromoacetic acid
Dibromochloromethane
Dichloroacetic acid
Haloacetic acids (HAA5)
Haloacetic acids (HAA9)*
Nitrate
Nitrate and nitrite
Total trihalomethanes (TTHMs)
Trichloroacetic acid
Other Contaminants Detected
Aluminum
Barium
Bromomethane
Chlorate*
Chloromethane
Chromium (hexavalent)*
Fluoride
Lithium
Manganese
Molybdenum
Radium, combined (-226 and -228)
Strontium*
Vanadium*

Protect your family's health.

Don't wait for your utility to improve. Get a free water analysis from AquaPura and find the right filtration system for your home.