Water Quality in CROW AGENCY, MT (59022)

EPA violation data for public water systems serving ZIP code 59022.

174

Total Violations

0

Health-Based

174

Monitoring / Reporting

166

Resolved

What does this mean?

166 of 174 violations have been resolved. None of these are health-based violations — no contaminant levels exceeded federal safety limits. The remaining 174 are monitoring or reporting violations (missed testing deadlines or late paperwork — not necessarily a water quality issue). Not all violations mean your water is unsafe. The EPA requires reporting even for minor administrative issues.

Water systems: 7 Population served: 5,391

Violations Detail (174 total)

ContaminantCategoryMCL LimitMeasuredDateStatusHealth Effects
Lead and Copper RuleMonitoringN/AN/ASep 28, 2025ActiveN/A
Interim Enhanced Surface Water Treatment RuleMonitoringN/AN/AJun 30, 2025ResolvedN/A
Interim Enhanced Surface Water Treatment RuleMonitoringN/AN/AApr 30, 2025ResolvedN/A
Interim Enhanced Surface Water Treatment RuleMonitoringN/AN/AJan 31, 2025ResolvedN/A
Interim Enhanced Surface Water Treatment RuleMonitoringN/AN/ADec 31, 2024ResolvedN/A
Lead and Copper RuleMonitoringN/AN/ADec 31, 2024ActiveN/A
Lead and Copper RuleMonitoringN/AN/ADec 31, 2024ActiveN/A
Interim Enhanced Surface Water Treatment RuleMonitoringN/AN/ANov 30, 2024ResolvedN/A
Interim Enhanced Surface Water Treatment RuleMonitoringN/AN/AOct 31, 2024ResolvedN/A
Lead and Copper RuleMonitoringN/AN/ASep 30, 2024ActiveN/A

Lead & Copper Levels

Violation Timeline

2025(4)

Lead and Copper Rule

66

Sep 28Active

Interim Enhanced Surface Water Treatment Rule

38

Jun 30Resolved

Interim Enhanced Surface Water Treatment Rule

38

Apr 30Resolved

Interim Enhanced Surface Water Treatment Rule

38

Jan 31Resolved

2024(6)

Interim Enhanced Surface Water Treatment Rule

38

Dec 31Resolved

Lead and Copper Rule

52

Dec 31Active

Lead and Copper Rule

52

Dec 31Active

Interim Enhanced Surface Water Treatment Rule

38

Nov 30Resolved

Interim Enhanced Surface Water Treatment Rule

38

Oct 31Resolved

Lead and Copper Rule

52

Sep 30Active

How Does This Compare?

CROW AGENCY (59022) has 174 recorded violations, none of which are health-based. 8 remain unresolved. Consider testing your tap water independently for added peace of mind.

Recommended Water Filters

Based on the contaminants detected in your area, these filter types may help improve your water quality.

Reverse Osmosis System

Highly effective at removing heavy metals, dissolved solids, and a wide range of contaminants. Recommended for homes with lead or arsenic concerns.

Targets:Lead, Copper, Arsenic, Mercury, Cadmium

Look for:NSF/ANSI 58 certified

NSF Certified Products → EPA Safe Drinking Water Guide →

Activated Carbon Filter

Excellent for removing chlorine, chloramine, and disinfection byproducts like THMs and HAAs. Available as pitcher filters, countertop, or under-sink units.

Targets:THMs, HAAs, Chlorine, Chloramine, Taste & Odor

Look for:NSF/ANSI 42 & 53 certified

NSF Certified Products → EPA Safe Drinking Water Guide →

UV Water Purifier

Uses ultraviolet light to neutralize bacteria, viruses, and parasites without chemicals. Ideal for homes with microbial contamination concerns.

Targets:E. coli, Coliform, Giardia, Cryptosporidium

Look for:NSF/ANSI 55 (Class A) certified

NSF Certified Products → EPA Safe Drinking Water Guide →

Always look for filters certified by NSF International for the specific contaminants you want to remove.

Nearby ZIP Codes

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