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S & T Mutual Water Company

Drinking water quality, contact, and Consumer Confidence Report

Serving 1 city in CA ยท PWSID CA4000523

S & T Mutual Water Company serves 591 people. 1 contaminant currently exceed health-based guidelines โ€” full breakdown below.

Monitor
1 contaminant above EPA health-based guidelines (MCLGs)
People served
591
PFAS
No results on file
Health-based violations since 2020
0

Data sources: EPA SDWIS, S & T Mutual 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.

1K
People Served
1
City
1
Water Sources
0
Health-based violations since 2020

Official S & T Mutual Water Company Resources

Emergency Contact

805-316-0640

Available 24/7 for emergencies

Visit Official Website

S & T Mutual Water Company Service Area

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Service Area

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

S & T Mutual Water Company Water Quality Grade

Not graded: Monitor

S & T Mutual Water Company reads Monitor. A letter grade is given only beside a Safe verdict.

1
Above Health Guidelines
0
Health-based violations since 2020

Is S & T Mutual Water Company Water Safe to Drink?

S & T Mutual Water Company has reported 1 contaminant 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 591 people across 1 city 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 โ†’How does California water quality rank nationally? โ†’

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 S & T Mutual Water Company:

S & T Mutual Water Company Service Area

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S & T Mutual Water Company Contact & Information

Phone

Emergency Line

805-316-0640

24/7 After-Hours

Mailing Address

Pecho Valley Road Los Osos, CA 93402

B2B Contact Data

B2B Contact Data Available

Contacts for S & T Mutual Water Company

Updated Jan 2026
Sample Preview (masked)
NameTitlePhoneEmail
Jโ–ˆโ–ˆโ–ˆโ–ˆ Sโ–ˆโ–ˆโ–ˆโ–ˆWater Treatment Supervisor(555) โ–ˆโ–ˆโ–ˆ-โ–ˆโ–ˆโ–ˆโ–ˆjโ–ˆโ–ˆโ–ˆโ–ˆ@cityโ–ˆโ–ˆโ–ˆโ–ˆ.gov
Mโ–ˆโ–ˆโ–ˆโ–ˆ Jโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆUtility Director(555) โ–ˆโ–ˆโ–ˆ-โ–ˆโ–ˆโ–ˆโ–ˆmโ–ˆโ–ˆโ–ˆโ–ˆ@waterโ–ˆโ–ˆโ–ˆโ–ˆ.org
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Water Sources & Treatment

Water Sources

Groundwater

Treatment Methods

Not specified

S & T Mutual 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 ยง1414(c)(4)). It summarizes contaminants tested, MCL and MCLG comparisons, and any system violations from the prior calendar year.

A current CCR for S & T Mutual 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 โ€” residents already find it here.

Free through launch ยท no credit card ยท cancel anytime

Residents: contact the utility directly using the phone number above, or check the EPAโ€™s national CCR portal. Reports are typically distributed by mail or posted on the utilityโ€™s official website.

S & T Mutual Water Company Annual Water Quality Reports

Find S & T Mutual Water Companyโ€™s report

We donโ€™t have a link we can confirm belongs to this system, and weโ€™d rather show none than the wrong utilityโ€™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

S & T Mutual 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 1 contaminant above health-based guidelines here. Your own tap water can differ โ€” 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 โ€” we only ever share anonymized, area-level summaries.

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Recommended Water Filters for S & T Mutual Water Company

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

Frequently Asked Questions about S & T Mutual Water Company

Is S & T Mutual Water Company water safe to drink?

S & T Mutual Water Company has reported 1 contaminant above EPA health-based guidelines (MCLGs) in at least one city served. We recommend reviewing individual city reports for specific water quality details.

Does S & T Mutual Water Company have PFAS in its water?

We hold no PFAS ("forever chemicals") results for S & T Mutual Water Company. That is a gap in our data, not a clean result โ€” EPA may already have sampled this system under its fifth Unregulated Contaminant Monitoring Rule (UCMR5). Contact S & T Mutual Water Company at 805-234-6086 for its latest PFAS results.

How do I pay my S & T Mutual Water Company water bill?

Visit the S & T Mutual Water Company official website at https://www.st-water.com/ for bill payment options. For questions about your bill, call 805-234-6086.

How many people does S & T Mutual Water Company serve?

S & T Mutual Water Company serves 591 people across 1 city in CA.

What cities does S & T Mutual Water Company serve?

S & T Mutual Water Company provides water service to: Los Osos, CA.

Does S & T Mutual Water Company have any EPA violations?

No. S & T Mutual Water Company has no health-based EPA violation since 2020 (EPA data as of Q2 2026).

What is S & T Mutual Water Company's phone number?

You can contact S & T Mutual Water Company at 805-234-6086. Their mailing address is: Pecho Valley Road Los Osos, CA 93402.

Where can I find S & T Mutual Water Company's Consumer Confidence Report?

Community water systems must publish an annual CCR. If you're looking for S & T Mutual Water Company's CCR, contact them at 805-234-6086 or check back here โ€” 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 โ€” typically within days of an EPA SDWIS refresh.

Spotted a data issue? Use the Spotted something off? link at the bottom of the page โ€” corrections feed back into the next data refresh. Learn more about TapWaterData.

Are you S & T Mutual 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 โ€” it inherits this page's search authority and reaches every customer who Googles S & T Mutual Water Company.

  • 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.
Claim S & T Mutual Water Company

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Residents keep our data honest.

This form corrects our data; it does not reach S & T Mutual Water Company. For a problem with your water now (discolored water, no water, low pressure, a leak), contact S & T Mutual Water Company directly.

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