Tap Water Quality Report
Tap water quality in CHEYENNE, Wyoming
Tap water in CHEYENNE, Wyoming receives a grade of C (71/100) from TapWaterSafety.org. It's served by CHEYENNE BOARD OF PUBLIC UTILITIES. The most significant water quality concerns are: Haloacetic acids (HAA9) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in CHEYENNE's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving CHEYENNE.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 27.5 ppb, 459x above the EWG health guideline of 0.06 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 34.5 ppb, 230x above the EWG health guideline of 0.15 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 21.4 ppb, 214x above the EWG health guideline of 0.1 ppb.
EPA compliance record
Official U.S. EPA records for CHEYENNE BOARD OF PUBLIC UTILITIES (system ID WY5600011) for the last 3 years. Checked 2026-10-07.
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Recommended filters for CHEYENNE
Filters matched to the specific contaminants in CHEYENNE's water supply.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
All contaminants detected in CHEYENNE's tap water
Every contaminant identified, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal. Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Haloacetic acids (HAA9) Disinfection byproduct |
27.5 ppb | 0.06 | — | — | — | — | — | 459× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
34.5 ppb | 0.15 | 80.0 | 100 | — | — | — | 230× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
21.4 ppb | 0.1 | 60.0 | 60 | — | — | — | 214× over |
| Trichloroacetic acid Disinfection byproduct |
11.1 ppb | 0.1 | — | — | — | — | — | 111× over |
| Bromodichloromethane Disinfection byproduct |
6.55 ppb | 0.06 | — | — | — | — | — | 109× over |
| Bromochloroacetic acid Disinfection byproduct |
2.09 ppb | 0.02 | — | — | — | — | — | 104× over |
| Chloroform Disinfection byproduct |
26.4 ppb | 0.4 | — | — | — | — | — | 66× over |
| Dichloroacetic acid Disinfection byproduct |
10.2 ppb | 0.2 | — | — | — | — | — | 51× over |
| Dibromochloromethane Disinfection byproduct |
1.4 ppb | 0.1 | — | — | — | — | — | 14× over |
| Dibromoacetic acid Disinfection byproduct |
0.23 ppb | 0.03 | — | — | — | — | — | 7.7× over |
| Nitrate Inorganic |
0.6 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 4.3× over |
| Uranium Radiological |
1.42 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | 3.3× over |
| Nitrate and nitrite Inorganic |
0.447 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 3.2× over |
| Radium, combined (-226 and -228) Radiological |
0.13 pCi/L | 0.05 | 5.0 | — | — | — | — | 2.6× over |
| Chromium (hexavalent) Heavy metal |
0.0442 ppb | 0.02 | — | — | — | — | — | 2.2× over |
| Manganese Heavy metal |
8.21 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Vanadium Other |
1.49 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Bromoform Disinfection byproduct |
0.0347 ppb | 0.5 | — | — | — | — | — | Below guideline |
| Chlorate Disinfection byproduct |
4.92 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
0.541 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.144 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.517 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Lithium Other |
1.2 ppb | — | — | — | — | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines, California OEHHA PHGs, EWG Tap Water Database.
Treatment plant contact info
For service issues, water quality concerns, or to request a Consumer Confidence Report from CHEYENNE BOARD OF PUBLIC UTILITIES.