Tap Water Quality Report
Tap water quality in NORRISTOWN, Pennsylvania
Tap water in NORRISTOWN, Pennsylvania receives a grade of D (64/100) from TapWaterSafety.org. It's served by PA AMERICAN NORRISTOWN. The most significant water quality concerns are: PFAS contamination; Haloacetic acids (HAA9) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline; Bromodichloromethane significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in NORRISTOWN's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving NORRISTOWN.
PFAS contamination
Severe concernPerfluorooctanoic acid (PFOA) detected. PFAS are persistent chemicals linked to cancer and immune effects with no known safe exposure threshold.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 20.2 ppb, 336x above the EWG health guideline of 0.06 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 41.4 ppb, 276x above the EWG health guideline of 0.15 ppb.
Bromodichloromethane significantly above health guideline
Moderate concernBromodichloromethane detected at 12.0 ppb, 200x above the EWG health guideline of 0.06 ppb.
EPA compliance record
Official U.S. EPA records for PA AMERICAN NORRISTOWN (system ID PA1460046) for the last 3 years. Checked 2026-10-07.
| Rule | Type | Since | Status |
|---|---|---|---|
| Interim and Long Term 1 Enhanced Surface Water Treatment Rule | Missed testing or reporting | 10/01/2024 | Resolved |
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Recommended filters for NORRISTOWN
Filters matched to the specific contaminants in NORRISTOWN's water supply.
Filter certified for PFOA/PFOS (NSF/ANSI 53 or 58)
$180-$750Reverse osmosis and some carbon block filters reduce PFAS. Look for certification to NSF/ANSI 53 or 58 for PFOA/PFOS.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
All contaminants detected in NORRISTOWN's tap water
Every contaminant identified, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal. Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Haloacetic acids (HAA9) Disinfection byproduct |
20.2 ppb | 0.06 | — | — | — | — | — | 336× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
41.4 ppb | 0.15 | 80.0 | 100 | — | — | — | 276× over |
| Bromodichloromethane Disinfection byproduct |
12.0 ppb | 0.06 | — | — | — | — | — | 200× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
18.6 ppb | 0.1 | 60.0 | 60 | — | — | — | 186× over |
| Trichloroacetic acid Disinfection byproduct |
9.96 ppb | 0.1 | — | — | — | — | — | 100× over |
| Chloroform Disinfection byproduct |
23.4 ppb | 0.4 | — | — | — | — | — | 59× over |
| Dibromochloromethane Disinfection byproduct |
5.28 ppb | 0.1 | — | — | — | — | — | 53× over |
| Chromium (hexavalent) Heavy metal |
0.929 ppb | 0.02 | — | — | — | — | — | 46× over |
| Dichloroacetic acid Disinfection byproduct |
7.7 ppb | 0.2 | — | — | — | — | — | 39× over |
| Dibromoacetic acid Disinfection byproduct |
0.942 ppb | 0.03 | — | — | — | — | — | 31× over |
| Nitrate Inorganic |
2.73 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 19× over |
| Perfluorooctanoic acid (PFOA) PFAS |
1.35 ppt | 0.09 | 4.0 | 100 | 100 | 0.007 | — | 15× over |
| Bromoform Disinfection byproduct |
0.646 ppb | 0.5 | — | — | — | — | — | 1.3× over |
| Bromochloromethane Other |
0.065 ppb | 0.06 | — | — | — | — | — | 1.1× over |
| Chlorate Disinfection byproduct |
119.8 ppb | 210.0 | — | — | — | — | — | Below guideline |
| 1,4-Dioxane Semi-volatile organic compound |
0.163 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| Antimony Heavy metal |
0.3 ppb | 1.0 | 6.0 | 10 | 20 | 1 | — | Below guideline |
| Molybdenum Other |
1.68 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
1.43 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Perfluorobutanoic Acid (PFBA) PFAS |
2.33 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
2.3 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
2.25 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
1.2 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.196 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Lithium Other |
3.8 ppb | — | — | — | — | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines, California OEHHA PHGs, EWG Tap Water Database.
Treatment plant contact info
For service issues, water quality concerns, or to request a Consumer Confidence Report from PA AMERICAN NORRISTOWN.