PlainEnviro

Cheyenne Water Quality

Wyoming

Health Violations

The tap water in Cheyenne, Wyoming is served by 14 EPA-regulated water systems covering approximately 77,707 people. 11 health-based violations are on record, most recently for 8000 in 2025. Data source: EPA Safe Drinking Water Information System.

14
Water Systems
77,707
Population Served
11
Total Violations
11
Health-Based Violations

Drinking water in Cheyenne, Wyoming is delivered through 14 EPA-regulated community water systems serving an estimated 77,707 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.

The SDWIS record for Cheyenne shows 11 total violations across all 14 systems, of which 11 are health-based, meaning either a Maximum Contaminant Level (MCL) was exceeded or a required treatment technique was not followed. Contaminants cited in health-based violations include 8000, 0700, 1038. 8 TRI-reporting industrial facilities are also located within the city limits.

A past EPA violation does not mean the water is currently unsafe, utilities are required to notify customers and remediate under state primacy oversight. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the Wyoming drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.

Community Water Systems

System Name Pop. Served Violations Status
CHEYENNE BOARD OF PUBLIC UTILITIES 64,165 0 Clean
SOUTH CHEYENNE WATER & SEWER DISTRICT 10,000 0 Clean
WINCHESTER HILLS 1,078 0 Clean
WEST WINDS 663 0 Clean
BIG COUNTRY ESTATES 615 0 Clean
CIMMARON VILLAGE 327 0 Clean
ORCHARD VALLEY WATER COMPANY 260 2 Health
ENGLEWOOD VILLAGE MHP 152 0 Clean
HIGHLAND RANCH ESTATES 128 0 Clean
HIDE-A-WAY MOBILE VILLAGE 107 3 Health
CARPENTER W&S DISTRICT 94 1 Health
RESTWAY TRAVEL PARK 62 2 Health
MILLER LOWER MOBILE HOME PARK 30 1 Health
EVERGREEN MOBILE HOME PARK 26 2 Health

Does this city have health-based water violations?

Health-based violations indicate contaminant levels that exceeded EPA maximum contaminant levels (MCLs). This does not necessarily mean water is currently unsafe.

Contaminant Begin Date
8000 2025-08-01
0700 2023-07-23
0700 2021-07-31
0700 2021-07-31
0700 2019-08-10
0700 2019-08-10
1038 2018-10-01
8000 2017-06-01
8000 2017-02-25
8000 2016-11-26
0700 2014-08-01

TRI Facilities in Cheyenne

Facility Total Releases
Dyno Nobel Inc-Cheyenne Plant 27.1M lbs
Cheyenne Renewable Diesel Co LLC 241.6K lbs
Brenntag Pacific Inc. 5.4K lbs
Knife River Cheyenne 1.2K lbs
U.S. Dod Usaf Wyoming Ang 334 lbs
Voestalpine Railway Systems Nortrak Inc. 78 lbs
Ergon Asphalt & Emulsions Inc. - Cheyenne 14 lbs
Crafco Inc. - Cheyenne 0 lbs

Frequently Asked Questions

Is Cheyenne, Wyoming water safe to drink? ▼
Cheyenne is served by 14 EPA-regulated water systems covering approximately 77,707 people. 11 health-based violations have been recorded. A past violation does not necessarily mean water is currently unsafe, systems are required to notify customers and resolve issues. Contact your local water utility for current status.
How many water violations does Cheyenne have? ▼
Cheyenne water systems have a total of 11 violations on record in the EPA Safe Drinking Water Information System, of which 11 are health-based (MCL exceedances). The remaining violations are monitoring or reporting violations.
What contaminants were found in Cheyenne water? ▼
Health-based violations for Cheyenne water systems include the following contaminants: 8000, 0700, 1038. Source: EPA Safe Drinking Water Information System (SDWIS).
How many water systems serve Cheyenne? ▼
14 EPA-regulated community water systems serve Cheyenne, Wyoming, collectively covering approximately 77,707 people. Data is from the EPA Safe Drinking Water Information System (SDWIS).
Where does Cheyenne get its drinking water? ▼
Cheyenne's water supply comes from 14 EPA-regulated community water systems. Source type data is not available for all systems. For detailed supply information, contact your local water utility. Source: EPA SDWIS.
Are there pollution sources near Cheyenne? ▼
Yes, 8 EPA Toxic Release Inventory (TRI) facilities are registered in Cheyenne, Wyoming, reporting a combined 27.4M lbs of toxic chemical releases. TRI data reflects self-reported emissions; it does not measure exposure or health effects. Source: EPA TRI.

Related Guides

Understanding Water Quality Violations
What MCL violations mean and how to read EPA data
How to Check Environmental Quality
Step-by-step guide to checking your local environment
Understanding EPA Data
How EPA collects and publishes environmental data

About This Data

Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). Violations are reported by state agencies to EPA and include both health-based (MCL exceedances) and monitoring/reporting violations.

A reported violation does not necessarily mean water is currently unsafe to drink. Many violations are resolved quickly, and public water systems are required to notify customers of significant issues. For current water quality, contact your local water utility.

TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.

Read our methodology - how this data is sourced, computed, and verified.

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Data sourced from U.S. EPA environmental datasets. See our methodology for details. Retrieved and formatted by PlainEnviro Editorial