Water Quality in NONDALTON, AK (99640)

EPA violation data for public water systems serving ZIP code 99640.

359

Total Violations

10

Health-Based

349

Monitoring / Reporting

358

Resolved

What does this mean?

358 of 359 violations have been resolved. 10 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 349 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: 1 Population served: 205

Violations Detail (359 total)

ContaminantCategoryMCL LimitMeasuredDateStatusHealth Effects
Revised Total Coliform RuleMonitoringN/AN/AAug 31, 2025ResolvedN/A
ChlorineMonitoringN/AN/AAug 31, 2025ResolvedEye and nose irritation; stomach discomfort
Lead and Copper RuleMonitoringN/AN/AJun 30, 2025ActiveN/A
ChlorineMonitoringN/AN/AJun 30, 2025ResolvedEye and nose irritation; stomach discomfort
Surface Water Treatment RuleMonitoringN/AN/AJun 30, 2025ResolvedN/A
Revised Total Coliform RuleMonitoringN/AN/AJun 30, 2025ResolvedN/A
ChlorineMonitoringN/AN/AMay 31, 2025ResolvedEye and nose irritation; stomach discomfort
Surface Water Treatment RuleHealth-BasedN/AN/AMay 31, 2025ResolvedN/A
Surface Water Treatment RuleHealth-BasedN/AN/AMay 31, 2025ResolvedN/A
Surface Water Treatment RuleMonitoringN/AN/AMay 31, 2025ResolvedN/A

Lead & Copper Levels

Violation Timeline

2025(19)

Revised Total Coliform Rule

3A

Aug 31Resolved

Chlorine

27

Aug 31Resolved

Lead and Copper Rule

52

Jun 30Active

Chlorine

27

Jun 30Resolved

Surface Water Treatment Rule

36

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Chlorine

27

May 31Resolved

Surface Water Treatment Rule

41

May 31Resolved

Surface Water Treatment Rule

41

May 31Resolved

Surface Water Treatment Rule

36

May 31Resolved

Chlorine

27

Apr 30Resolved

Revised Total Coliform Rule

3A

Apr 30Resolved

Interim Enhanced Surface Water Treatment Rule

38

Apr 30Resolved

Surface Water Treatment Rule

36

Apr 30Resolved

Surface Water Treatment Rule

41

Mar 31Resolved

Surface Water Treatment Rule

41

Mar 31Resolved

Surface Water Treatment Rule

41

Mar 31Resolved

Surface Water Treatment Rule

36

Feb 28Resolved

Interim Enhanced Surface Water Treatment Rule

38

Feb 28Resolved

2024(23)

Chlorine

27

Dec 31Resolved

Surface Water Treatment Rule

36

Dec 31Resolved

Chlorine

27

Nov 30Resolved

Interim Enhanced Surface Water Treatment Rule

44

Nov 30Resolved

Surface Water Treatment Rule

41

Nov 30Resolved

Surface Water Treatment Rule

36

Nov 30Resolved

Revised Total Coliform Rule

3A

Nov 30Resolved

Chlorine

27

Aug 31Resolved

Revised Total Coliform Rule

3A

Aug 31Resolved

Surface Water Treatment Rule

41

Aug 31Resolved

Surface Water Treatment Rule

36

Jul 31Resolved

Lead and Copper Rule

52

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Interim Enhanced Surface Water Treatment Rule

43

Jun 30Resolved

Surface Water Treatment Rule

36

Jun 30Resolved

Chlorine

27

Jun 30Resolved

Interim Enhanced Surface Water Treatment Rule

44

Jun 30Resolved

Surface Water Treatment Rule

36

May 31Resolved

Interim Enhanced Surface Water Treatment Rule

38

May 31Resolved

Surface Water Treatment Rule

36

Apr 30Resolved

Interim Enhanced Surface Water Treatment Rule

38

Apr 30Resolved

Surface Water Treatment Rule

36

Mar 31Resolved

Interim Enhanced Surface Water Treatment Rule

38

Mar 31Resolved

How Does This Compare?

NONDALTON (99640) has 359 recorded violations, including 10 health-based. 1 remains 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

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

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

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

Nearby ZIP Codes

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