Casper, WY 82604

10 water systems • 65,842 residents

Excellent water quality with minimal contaminants

A

Score: 86/100

Graded on EPA violations, contaminants, severity, compliance, and enforcement history. See methodology.

Data updated June 2026 • Sources: EPA ECHO and EPA Envirofacts

24

Contaminants Detected

175

Violations on Record

16

Health-Based Violations

0

Recent Violations

Grade Breakdown

Contaminant Count1 / 25
Violation History23 / 25
Contaminant Severity23 / 25
System Compliance0 / 15
Enforcement History0 / 10
Total Score86%

86 / 100 points

Recommended Water Filters

  • ✓Point-of-Use Carbon Filter (NSF-certified for lead)
  • ✓Reverse Osmosis or Ion Exchange Filter
  • ✓Ultraviolet (UV) Purification
  • ✓Activated Carbon Filter (disinfection byproducts)
Compare filter types in our Filter Guide →

Consult a water quality specialist for personalized recommendations.

Casper vs WY & National Average

Detected Contaminants

24 contaminants detected across water systems serving this ZIP code

ContaminantCategory
NitrateAgricultural
BromateDisinfection Byproduct
TTHMDisinfection Byproduct
ArsenicHeavy Metal
BariumHeavy Metal
CadmiumHeavy Metal
ChromiumHeavy Metal
Lead and Copper RuleHeavy Metal
MercuryHeavy Metal
SeleniumHeavy Metal
FluorideInorganic
Coliform (TCR)Microorganism
Revised Total Coliform RuleMicroorganism
2,4-DOther
2,4,5-TPOther
BHC-GAMMAOther
ChlorineOther
Consumer Confidence RuleOther
EndrinOther
MethoxychlorOther
Surface Water Treatment RuleOther
ToxapheneOther
Combined Radium (-226 and -228)Radiological
Gross Alpha, Excl. Radon and URadiological

Water System Information

Systems Serving This ZIP:
AIR BASE ACRES I&S DISTRICT, PIONEER WATER & SEWER DISTRICT, POISON SPIDER I&S DISTRICT, MILE-HI I&S DISTRICT, NATRONA COUNTY INT'L AIRPORT +5 more
Population Served:
65,842
Systems With Violations:
10 of 10
Major Violations:
45
Enforcement Actions:
116

Nearby Areas

82644

Mills • 22.8 mi away

D

82601

Casper • 30.4 mi away

D

82609

Casper • 33.6 mi away

A

82636

Evansville • 36.7 mi away

B

82643

Midwest • 43 mi away

B

82635

Edgerton • 43.6 mi away

B

Frequently Asked Questions

What does the grade mean?

Our A–F grade ranks this ZIP code's water quality against every other analyzed ZIP in the country, based on EPA data. A = among the best, F = among the most troubled.

Is my tap water safe to drink?

Water systems regulated by the EPA must comply with Safe Drinking Water Act standards. However, if you're concerned about water quality, consider a water filter appropriate for your contaminants.

How often is the data updated?

We update our data quarterly with the latest EPA ECHO and Envirofacts data. Historical violations are tracked to identify patterns.

What filters do you recommend?

Filter recommendations are based on detected contaminants in your area. See our Filter Guide for detailed information about different filter types.