Water Quality in NORRISTOWN, PA (19403)

EPA violation data for public water systems serving ZIP code 19403.

3,329

Total Violations

4

Health-Based

3,325

Monitoring / Reporting

3,323

Resolved

What does this mean?

3,323 of 3,329 violations have been resolved. 4 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 3,325 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: 27 Population served: 17,355

Violations Detail (3329 total)

ContaminantCategoryMCL LimitMeasuredDateStatusHealth Effects
Lead and Copper RuleMonitoringN/AN/ASep 30, 2025ActiveN/A
Lead and Copper RuleMonitoringN/AN/ASep 30, 2025ActiveN/A
Groundwater RuleMonitoringN/AN/AJul 31, 2025ResolvedN/A
Groundwater RuleMonitoringN/AN/AJul 31, 2025ResolvedN/A
ChlorineMonitoringN/AN/AJul 31, 2025ResolvedEye and nose irritation; stomach discomfort
ChlorineMonitoringN/AN/AJul 31, 2025ResolvedEye and nose irritation; stomach discomfort
Groundwater RuleMonitoringN/AN/AJun 30, 2025ResolvedN/A
Groundwater RuleMonitoringN/AN/AJun 30, 2025ResolvedN/A
Groundwater RuleMonitoringN/AN/AJun 30, 2025ResolvedN/A
Groundwater RuleMonitoringN/AN/AJun 30, 2025ResolvedN/A

Lead & Copper Levels

Violation Timeline

2025(14)

Lead and Copper Rule

52

Sep 30Active

Lead and Copper Rule

52

Sep 30Active

Groundwater Rule

31

Jul 31Resolved

Groundwater Rule

31

Jul 31Resolved

Chlorine

27

Jul 31Resolved

Chlorine

27

Jul 31Resolved

Groundwater Rule

31

Jun 30Resolved

Groundwater Rule

31

Jun 30Resolved

Groundwater Rule

31

Jun 30Resolved

Groundwater Rule

31

Jun 30Resolved

TTHM

27

Jun 30Resolved

Total Haloacetic Acids (HAA5)

27

Jun 30Resolved

Total Haloacetic Acids (HAA5)

27

Jun 30Resolved

TTHM

27

Jun 30Resolved

2024(153)

TTHM

27

Dec 31Resolved

TTHM

27

Dec 31Resolved

TTHM

27

Dec 31Resolved

TTHM

27

Dec 31Resolved

Total Haloacetic Acids (HAA5)

27

Dec 31Resolved

Total Haloacetic Acids (HAA5)

27

Dec 31Resolved

Total Haloacetic Acids (HAA5)

27

Dec 31Resolved

Total Haloacetic Acids (HAA5)

27

Dec 31Resolved

2,3,7,8-TCDD

03

Dec 31Resolved

2,3,7,8-TCDD

03

Dec 31Resolved

2,3,7,8-TCDD

03

Dec 31Resolved

2,3,7,8-TCDD

03

Dec 31Resolved

2,3,7,8-TCDD

03

Dec 31Resolved

Revised Total Coliform Rule

3A

Oct 31Resolved

Revised Total Coliform Rule

3A

Oct 31Resolved

Revised Total Coliform Rule

3A

Oct 31Resolved

Revised Total Coliform Rule

3A

Oct 31Resolved

E. COLI

34

Oct 18Active

E. COLI

34

Oct 18Active

Total Haloacetic Acids (HAA5)

27

Sep 30Resolved

Total Haloacetic Acids (HAA5)

27

Sep 30Resolved

Total Haloacetic Acids (HAA5)

27

Sep 30Resolved

Total Haloacetic Acids (HAA5)

27

Sep 30Resolved

TTHM

27

Sep 30Resolved

TTHM

27

Sep 30Resolved

TTHM

27

Sep 30Resolved

TTHM

27

Sep 30Resolved

Groundwater Rule

31

Sep 30Resolved

Groundwater Rule

31

Sep 30Resolved

Groundwater Rule

31

Sep 30Resolved

Groundwater Rule

31

Sep 30Resolved

Nitrate

03

Sep 30Resolved

2,3,7,8-TCDD

03

Sep 30Resolved

2,3,7,8-TCDD

03

Sep 30Resolved

2,3,7,8-TCDD

03

Sep 30Resolved

2,3,7,8-TCDD

03

Sep 30Resolved

2,3,7,8-TCDD

03

Sep 30Resolved

2,3,7,8-TCDD

03

Sep 30Resolved

Nitrate

03

Sep 30Resolved

Nitrite

03

Sep 30Resolved

Nitrite

03

Sep 30Resolved

Nitrite

03

Sep 30Resolved

Nitrite

03

Sep 30Resolved

Nitrate

03

Sep 30Resolved

Nitrate

03

Sep 30Resolved

Nitrite

03

Sep 30Resolved

Nitrate

03

Sep 30Resolved

Nitrate

03

Sep 30Resolved

Nitrite

03

Sep 30Resolved

Radium-226

03

Jun 30Resolved

Radium-228

03

Jun 30Resolved

Radium-228

03

Jun 30Resolved

Radium-226

03

Jun 30Resolved

Gross Alpha, Excl. Radon and U

03

Jun 30Resolved

Gross Alpha, Excl. Radon and U

03

Jun 30Resolved

2,3,7,8-TCDD

03

Jun 30Resolved

2,3,7,8-TCDD

03

Jun 30Resolved

2,3,7,8-TCDD

03

Jun 30Resolved

2,3,7,8-TCDD

03

Jun 30Resolved

2,3,7,8-TCDD

03

Jun 30Resolved

2,3,7,8-TCDD

03

Jun 30Resolved

TTHM

27

Jun 30Resolved

TTHM

27

Jun 30Resolved

TTHM

27

Jun 30Resolved

Total Haloacetic Acids (HAA5)

27

Jun 30Resolved

Total Haloacetic Acids (HAA5)

27

Jun 30Resolved

Total Haloacetic Acids (HAA5)

27

Jun 30Resolved

Total Haloacetic Acids (HAA5)

27

Jun 30Resolved

TTHM

27

Jun 30Resolved

Endothall

03

Mar 31Resolved

Endothall

03

Mar 31Resolved

Endothall

03

Mar 31Resolved

Endothall

03

Mar 31Resolved

Public Notice

75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

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75

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75

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75

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75

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75

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

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75

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75

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75

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75

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

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75

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75

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75

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75

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75

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75

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

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75

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75

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75

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75

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75

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75

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75

Jan 10Resolved

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75

Jan 10Resolved

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75

Jan 10Resolved

Public Notice

75

Jan 10Resolved

How Does This Compare?

NORRISTOWN (19403) has 3,329 recorded violations, including 4 health-based. 6 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

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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