GSWC - SOUTHWEST
Drinking water quality, contact, and Consumer Confidence Report
Serving 12 cities in CA · PWSID CA1910155
GSWC - SOUTHWEST serves 275,369 people. See EPA records and contact info below.
- People served
- 275,369
Data sources: EPA SDWIS, GSWC - SOUTHWEST's published Consumer Confidence Report, California Department of Environmental Protection.
This page summarizes publicly available EPA and CCR records. For health decisions about your water, consult your utility or a licensed professional.
Official GSWC - SOUTHWEST Resources
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Emergency Contact
Available 24/7 for emergencies
GSWC - SOUTHWEST Service Area
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This map shows the approximate service area for GSWC - SOUTHWEST. Actual coverage may vary. Contact the utility directly to confirm service availability at your address.
GSWC - SOUTHWEST Water Quality Grade
Water quality is good with minor concerns.
Grade is calculated based on contaminants exceeding health guidelines (MCLG) and EPA Maximum Contaminant Level violations. A = Excellent (90-100), B = Good (80-89), C = Fair (70-79), D = Poor (60-69), F = Failing (<60).
Is GSWC - SOUTHWEST Water Safe to Drink?
GSWC - SOUTHWEST has reported 2 contaminants above EPA health-based guidelines (MCLGs) in at least one city served. We recommend reviewing individual city reports below for specific water quality details.
This utility serves 275,369 people across 12 cities in CA. Water quality can vary by location within the service area. Check individual city pages below for detailed contaminant data specific to your area.
Get your water independently tested in California →How does California water quality rank nationally? →
GSWC - SOUTHWEST Service Area
Alondra Park, CA
Carson, CA
Compton, CA
Del Aire, CA
Gardena, CA
Hawthorne, CA
Inglewood, CA
Lawndale, CA
Lennox, CA
West Athens, CA
West Rancho Dominguez, CA
Westmont, CA
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GSWC - SOUTHWEST Contact & Information
Emergency Line
24/7 After-Hours
Mailing Address
B2B Contact Data
B2B Contact Data Available
Contacts for GSWC - SOUTHWEST
| Name | Title | Phone | |
|---|---|---|---|
| J████ S████ | Water Treatment Supervisor | (555) ███-████ | j████@city████.gov |
| M████ J██████ | Utility Director | (555) ███-████ | m████@water████.org |
Water Sources & Treatment
Water Sources
Treatment Methods
Disinfectant Used
chloramines, chlorine, hydrogen peroxide, hypochlorite, ozone
GSWC - SOUTHWEST Consumer Confidence Report
A Consumer Confidence Report (CCR) is the EPA-mandated annual water-quality report every community water system must publish by July 1 each year (Safe Drinking Water Act §1414(c)(4)). It summarizes contaminants tested, MCL and MCLG comparisons, and any system violations from the prior calendar year.
A current CCR for GSWC - SOUTHWEST has not been published or validated on TapWaterData yet.
Residents: contact the utility directly using the phone number above, or check the EPA’s national CCR portal. Reports are typically distributed by mail or posted on the utility’s official website.
GSWC - SOUTHWEST Annual Water Quality Reports
Historical reports are being compiled. Check back soon for archived water quality data.
What is a CCR? The Consumer Confidence Report (CCR) is an annual water quality report that water utilities are required by the EPA to provide to customers. It contains information about your water source, detected contaminants, and compliance status.
Recommended Water Filters for GSWC - SOUTHWEST
Based on water quality data from cities served by GSWC - SOUTHWEST, we recommend NSF-certified filters that can remove contaminants above health guidelines.
Frequently Asked Questions about GSWC - SOUTHWEST
Is GSWC - SOUTHWEST water safe to drink?
Does GSWC - SOUTHWEST have PFAS in its water?
How do I pay my GSWC - SOUTHWEST water bill?
How many people does GSWC - SOUTHWEST serve?
What cities does GSWC - SOUTHWEST serve?
Does GSWC - SOUTHWEST have any EPA violations?
What is GSWC - SOUTHWEST's phone number?
Where can I find GSWC - SOUTHWEST's Consumer Confidence Report?
Similar water utilities in California
How we built this page
Water-quality and contact data on this page comes from public federal and state records. We update each utility's record whenever its underlying source publishes new data — typically within days of an EPA SDWIS refresh.
- Contaminants & violations: EPA Safe Drinking Water Information System (SDWIS) plus the Unregulated Contaminant Monitoring Rule (UCMR-5) for PFAS and emerging contaminants.
- Annual reports: GSWC - SOUTHWEST's most recent published Consumer Confidence Report (CCR), where available.
- Service area & contact: EPA SDWIS plus the California Department of Environmental Protection / Drinking Water program.
Spotted a data issue? Use the Spotted something off? link at the bottom of the page — corrections feed back into the next data refresh. Learn more about TapWaterData.
Are you GSWC - SOUTHWEST? Publish your 2027 CCR
TapWaterData runs a free CCR publishing service for community water systems. Claim this listing to publish your Consumer Confidence Report here — it inherits this page's search authority and reaches every customer who Googles GSWC - SOUTHWEST.
- EPA-compliant distribution. Satisfies the 2027 Revised CCR Rule direct-URL requirement with an auditable archive.
- Publish once a year. Agent-assisted workflow; no login setup for small systems.
- Inherits this page's reach. Your published CCR appears directly on the page customers already find on Google.
Free for operators. No card required. Typical setup: 5 minutes.
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