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Home/Utilities/California/THREE VALLEYS MWD

THREE VALLEYS MWD

Serving 15 cities in CA

Monitor
3 above health guidelines
0K
People Served
15
Cities
1
Water Sources
0
MCL Violations

Official THREE VALLEYS MWD Resources

THREE VALLEYS MWD Service Area

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Service Area

This map shows the approximate service area for THREE VALLEYS MWD. Actual coverage may vary. Contact the utility directly to confirm service availability at your address.

THREE VALLEYS MWD Water Quality Grade

C
Fair

Some contaminants exceed health guidelines.

Quality Score70/100
3
Above Health Guidelines
0
EPA Violations

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 THREE VALLEYS MWD Water Safe to Drink?

THREE VALLEYS MWD has reported 3 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 0 people across 15 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 β†’

THREE VALLEYS MWD Service Area

THREE VALLEYS MWD Contact & Information

Emergency Line

909) 399-5411

24/7 After-Hours

Mailing Address

1021 E. MIRAMAR AVENUE Claremont, CA 91711

B2B Contact Data

B2B Contact Data Available

Contacts for THREE VALLEYS MWD

Updated Jan 2026
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NameTitlePhoneEmail
Jβ–ˆβ–ˆβ–ˆβ–ˆ Sβ–ˆβ–ˆβ–ˆβ–ˆWater Treatment Supervisor(555) β–ˆβ–ˆβ–ˆ-β–ˆβ–ˆβ–ˆβ–ˆjβ–ˆβ–ˆβ–ˆβ–ˆ@cityβ–ˆβ–ˆβ–ˆβ–ˆ.gov
Mβ–ˆβ–ˆβ–ˆβ–ˆ Jβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆUtility Director(555) β–ˆβ–ˆβ–ˆ-β–ˆβ–ˆβ–ˆβ–ˆmβ–ˆβ–ˆβ–ˆβ–ˆ@waterβ–ˆβ–ˆβ–ˆβ–ˆ.org
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Water Sources & Treatment

Water Sources

Surface water

Treatment Methods

Not specified

THREE VALLEYS MWD Annual Water Quality Reports

2026 Water Quality Report
Latest Consumer Confidence Report (CCR)
View Report

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 THREE VALLEYS MWD

Based on water quality data from cities served by THREE VALLEYS MWD, we recommend NSF-certified filters that can remove contaminants above health guidelines.

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