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Riverside Highland Water Company

Drinking water quality, contact, and Consumer Confidence Report

Serving 3 cities in CA · PWSID CA3610057

Riverside Highland Water Company serves 18,800 people. PFAS detected above health guidelines (Perfluorohexanesulfonic acid, Perfluorooctanesulfonic acid) — full contaminant breakdown below.

Monitor
3 contaminants above EPA's legal limit (MCL, enforceable from April 26, 2029)
People served
18,800
Last EPA sample
2025-01-09
PFAS
Detected (3 compounds)
Health-based violations since 2020
0

Data sources: EPA SDWIS, Riverside Highland Water Company's published Consumer Confidence Report, and compliance monitoring reported to EPA by CA State Water Resources Control Board, Div. of Drinking Water.

This page summarizes publicly available EPA and CCR records. For health decisions about your water, consult your utility or a licensed professional.

19K
People Served
3
Cities
1
Water Sources
0
Health-based violations since 2020

Official Riverside Highland Water Company Resources

Help Paying Your Riverside Highland Water Company Water Bill

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Boil water advisories are issued by water systems and state agencies, and they change from day to day. Boil water advisories in California

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Riverside Highland Water Company Service Area

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Service Area

This map shows the approximate service area for Riverside Highland Water Company. Actual coverage may vary. Contact the utility directly to confirm service availability at your address.

Riverside Highland Water Company Water Quality Grade

Not graded: Monitor

Riverside Highland Water Company reads Monitor. A letter grade is given only beside a Safe verdict.

3
Above Health Guidelines
0
Health-based violations since 2020

Is Riverside Highland Water Company Water Safe to Drink?

Riverside Highland Water Company has reported 3 contaminants above EPA's legal limit (MCL, enforceable from April 26, 2029) in at least one city served. We recommend reviewing individual city reports below for specific water quality details.

This utility serves 18,800 people across 3 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? →

Boil water advisories are issued by water systems and state agencies, and they change from day to day. Boil water advisories in California

Learn more about the contaminants detected in Riverside Highland Water Company:

Fluoride in Riverside Highland Water Company Water

  • Riverside Highland Water Company

    PWSID CA3610057

    No fluoride level in our data for Riverside Highland Water Company. Your utility's annual water quality report (CCR) lists it.

Check fluoride levels by ZIP code

Riverside Highland Water Company Service Area

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Riverside Highland Water Company Contact & Information

Phone

Emergency Line

(909) 387-3545

Mailing Address

12374 MICHIGAN STREET Grand Terrace, CA 92323

B2B Contact Data

B2B Contact Data Available

Contacts for Riverside Highland Water Company

Updated Jan 2026
Sample Preview (masked)
NameTitlePhoneEmail
J████ S████Water Treatment Supervisor(555) ███-████j████@city████.gov
M████ J██████Utility Director(555) ███-████m████@water████.org
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Water Sources & Treatment

Water Sources

Groundwater

Treatment Methods

disinfection

Disinfectant Used

hypochlorite

Riverside Highland Water Company 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 Riverside Highland Water Company has not been published or validated on TapWaterData yet.

Publish your 2027 CCR

Are you the water operator here? Publish your official 2027-compliant CCR on this page — residents already find it here.

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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.

Riverside Highland Water Company Annual Water Quality Reports

Find Riverside Highland Water Company’s report

We don’t have a link we can confirm belongs to this system, and we’d rather show none than the wrong utility’s. CA State Water Resources Control Board, Div. of Drinking Water publishes drinking-water reports for systems in this state.

Visit CA State Water Resources Control Board, Div. of Drinking Water

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.

EPA Health-Based Violations Since 2020

Riverside Highland Water Company has no health-based EPA violation since 2020 (EPA data as of Q2 2026).

EPA SDWA violation data as of Q2 2026 (downloaded 2026-07-09).

Concerned about what's in your water?

You're viewing 3 contaminants above health-based guidelines here. Your own tap water can differ — upload your test (PDF or a photo) and we'll email a full plain-English reading of every number, free.

Your upload also helps us keep local water data accurate — we only ever share anonymized, area-level summaries.

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Recommended Water Filters for Riverside Highland Water Company

Based on water quality data from cities served by Riverside Highland Water Company, we recommend NSF-certified filters that can remove contaminants above health guidelines.

Filter guides for the contaminants detected here:

Frequently Asked Questions about Riverside Highland Water Company

Is Riverside Highland Water Company water safe to drink?

Riverside Highland Water Company has reported 3 contaminants above EPA's legal limit (MCL, enforceable from April 26, 2029) in at least one city served. We recommend reviewing individual city reports for specific water quality details.

Does Riverside Highland Water Company have PFAS in its water?

Yes. Riverside Highland Water Company has reported Perfluorohexanesulfonic acid, Perfluorooctanesulfonic acid, Perfluorooctanoic acid above EPA's enforceable limit under the 2024 PFAS rule (4 ng/L for PFOA and PFOS, 10 ng/L for PFHxS and PFNA), and Perfluorohexanesulfonic acid, Perfluorooctanesulfonic acid, Perfluorooctanoic acid above the MCLG health goal. PFAS ("forever chemicals") are linked to cancer and developmental issues. A certified NSF/ANSI 53 or 58 filter is rated to reduce them. Compliance is judged on a running annual average, so check the utility's latest Consumer Confidence Report for its official status.

How do I pay my Riverside Highland Water Company water bill?

Visit the Riverside Highland Water Company official website at https://rhwco.com/ for bill payment options. For questions about your bill, call 909-825-4128.

How many people does Riverside Highland Water Company serve?

Riverside Highland Water Company serves 18,800 people across 3 cities in CA.

What cities does Riverside Highland Water Company serve?

Riverside Highland Water Company provides water service to: Colton, CA; Grand Terrace, CA; Highgrove, CA.

Does Riverside Highland Water Company have any EPA violations?

No. Riverside Highland Water Company has no health-based EPA violation since 2020 (EPA data as of Q2 2026).

What is Riverside Highland Water Company's phone number?

You can contact Riverside Highland Water Company at 909-825-4128. Their mailing address is: 12374 MICHIGAN STREET Grand Terrace, CA 92323.

Where can I find Riverside Highland Water Company's Consumer Confidence Report?

Community water systems must publish an annual CCR. If you're looking for Riverside Highland Water Company's CCR, contact them at 909-825-4128 or check back here — we update monthly. The 2027 revised CCR Rule introduces new direct-URL distribution requirements.

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.

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 Riverside Highland Water Company? 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 Riverside Highland Water Company.

  • EPA-compliant distribution. Satisfies the 2027 Revised CCR Rule direct-URL requirement with an auditable archive.
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  • Inherits this page's reach. Your published CCR appears directly on the page customers already find on Google.
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