Water Quality in Mount Vernon, WA (98273)

EPA violation data for public water systems serving ZIP code 98273.

131

Total Violations

58

Health-Based

73

Monitoring / Reporting

126

Resolved

What does this mean?

126 of 131 violations have been resolved. 58 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 73 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: 100 Population served: 155,542

Violations Detail (131 total)

ContaminantCategoryMCL LimitMeasuredDateStatusHealth Effects
Lead and Copper RuleMonitoringN/AN/ASep 28, 2025ActiveN/A
Surface Water Treatment RuleMonitoringN/AN/AJul 31, 2025ResolvedN/A
Lead and Copper RuleMonitoringN/AN/AJul 30, 2025ActiveN/A
Consumer Confidence RuleMonitoringN/AN/AJun 30, 2025ResolvedN/A
Consumer Confidence RuleMonitoringN/AN/AJun 30, 2025ResolvedN/A
Lead and Copper RuleMonitoringN/AN/AJun 30, 2025ActiveN/A
TTHMHealth-BasedN/A80.95Jun 30, 2025ResolvedN/A
NitrateMonitoringN/AN/AJun 30, 2025ResolvedInfants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Surface Water Treatment RuleMonitoringN/AN/AJun 30, 2025ResolvedN/A
TTHMHealth-BasedN/A120.85Jun 30, 2025ResolvedN/A

Lead & Copper Levels

Violation Timeline

2025(24)

Lead and Copper Rule

66

Sep 28Active

Surface Water Treatment Rule

36

Jul 31Resolved

Lead and Copper Rule

66

Jul 30Active

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Lead and Copper Rule

52

Jun 30Active

TTHM

02

Jun 30Resolved

Nitrate

03

Jun 30Resolved

Surface Water Treatment Rule

36

Jun 30Resolved

TTHM

02

Jun 30Resolved

Total Haloacetic Acids (HAA5)

02

Jun 30Resolved

TTHM

02

Jun 30Resolved

TTHM

02

Jun 30Resolved

TTHM

02

Jun 30Resolved

Lead and Copper Rule

66

Mar 31Resolved

TTHM

02

Mar 31Resolved

TTHM

02

Mar 31Resolved

Total Haloacetic Acids (HAA5)

02

Mar 31Resolved

TTHM

02

Mar 31Resolved

TTHM

02

Mar 31Resolved

TTHM

02

Mar 31Resolved

Revised Total Coliform Rule

4B

Feb 28Resolved

Chlorine

27

Feb 28Resolved

Lead and Copper Rule

66

Jan 30Resolved

2024(44)

Lead and Copper Rule

52

Dec 31Active

Chlorine

27

Dec 31Resolved

Revised Total Coliform Rule

4B

Dec 31Resolved

TTHM

02

Dec 31Resolved

TTHM

02

Dec 31Resolved

Total Haloacetic Acids (HAA5)

27

Dec 31Resolved

TTHM

02

Dec 31Resolved

Total Haloacetic Acids (HAA5)

02

Dec 31Resolved

TTHM

27

Dec 31Resolved

TTHM

02

Dec 31Resolved

TTHM

27

Dec 31Resolved

Total Haloacetic Acids (HAA5)

27

Dec 31Resolved

TTHM

02

Sep 30Resolved

TTHM

02

Sep 30Resolved

TTHM

02

Sep 30Resolved

Total Haloacetic Acids (HAA5)

02

Sep 30Resolved

TTHM

02

Sep 30Resolved

TTHM

27

Sep 30Resolved

Total Haloacetic Acids (HAA5)

27

Sep 30Resolved

Public Notice

75

Jul 25Resolved

Public Notice

75

Jul 25Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Lead and Copper Rule

52

Jun 30Active

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Revised Total Coliform Rule

1A

Jun 30Resolved

TTHM

02

Jun 30Resolved

TTHM

02

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

TTHM

02

Jun 30Resolved

Total Haloacetic Acids (HAA5)

02

Jun 30Resolved

Revised Total Coliform Rule

1A

Jun 30Resolved

TTHM

02

Jun 30Resolved

TTHM

02

Mar 31Resolved

TTHM

02

Mar 31Resolved

TTHM

02

Mar 31Resolved

Total Haloacetic Acids (HAA5)

02

Mar 31Resolved

TTHM

02

Mar 31Resolved

Lead and Copper Rule

57

Mar 1Resolved

Lead and Copper Rule

57

Mar 1Resolved

Revised Total Coliform Rule

3A

Feb 29Resolved

How Does This Compare?

Mount Vernon (98273) has 131 recorded violations, including 58 health-based. 5 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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