Tap Water Quality Report
Tap water quality in NORTH WALES, Pennsylvania
Tap water in NORTH WALES, Pennsylvania receives a grade of D (67/100) from TapWaterSafety.org. It's served by NORTH WALES WATER AUTHORITY. The most significant water quality concerns are: Haloacetic acids (HAA9) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline; Arsenic detected. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in NORTH WALES's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving NORTH WALES.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 22.0 ppb, 367x above the EWG health guideline of 0.06 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 32.2 ppb, 214x above the EWG health guideline of 0.15 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 20.1 ppb, 201x above the EWG health guideline of 0.1 ppb.
Arsenic detected
Moderate concernArsenic detected at 0.3 ppb.
EPA compliance record
Official U.S. EPA records for NORTH WALES WATER AUTHORITY (system ID PA1460048) for the last 3 years. Checked 2026-10-07.
| Rule | Type | Since | Status |
|---|---|---|---|
| Ground Water Rule | Missed testing or reporting | 03/01/2025 | Resolved |
| Stage 2 Disinfectants and Disinfection Byproducts Rule | Missed testing or reporting | 04/01/2025 | 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 NORTH WALES
Filters matched to the specific contaminants in NORTH WALES's water supply.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
Reverse osmosis certified for arsenic (NSF/ANSI 58)
$429-$599Reverse osmosis certified under NSF/ANSI 58 for arsenic is the most reliable home option.
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 NORTH WALES'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 |
22.0 ppb | 0.06 | — | — | — | — | — | 367× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
32.2 ppb | 0.15 | 80.0 | 100 | — | — | — | 214× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
20.1 ppb | 0.1 | 60.0 | 60 | — | — | — | 201× over |
| Bromodichloromethane Disinfection byproduct |
6.17 ppb | 0.06 | — | — | — | — | — | 103× over |
| Trichloroacetic acid Disinfection byproduct |
8.08 ppb | 0.1 | — | — | — | — | — | 81× over |
| Arsenic Heavy metal |
0.3 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 75× over |
| Chloroform Disinfection byproduct |
23.7 ppb | 0.4 | — | — | — | — | — | 59× over |
| Dichloroacetic acid Disinfection byproduct |
11.8 ppb | 0.2 | — | — | — | — | — | 59× over |
| Dibromochloromethane Disinfection byproduct |
2.23 ppb | 0.1 | — | — | — | — | — | 22× over |
| Bromate Disinfection byproduct |
2.05 ppb | 0.1 | 10.0 | 10 | 10 | 0.1 | — | 20× over |
| Nitrate Inorganic |
1.3 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 9.3× over |
| Dibromoacetic acid Disinfection byproduct |
0.257 ppb | 0.03 | — | — | — | — | — | 8.6× over |
| Chromium (hexavalent) Heavy metal |
0.0873 ppb | 0.02 | — | — | — | — | — | 4.4× over |
| Uranium Radiological |
1.14 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | 2.7× over |
| Chlorate Disinfection byproduct |
151.9 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
36.3 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Barium Heavy metal |
222.9 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| 1,4-Dioxane Semi-volatile organic compound |
0.0395 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| Molybdenum Other |
3.9 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Bromoform Disinfection byproduct |
0.0457 ppb | 0.5 | — | — | — | — | — | Below guideline |
| Vanadium Other |
0.308 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Cyanide (free) Inorganic |
0.636 ppb | 150.0 | — | 50 | 70 | 150 | — | Below guideline |
| 1,1-Dichloroethane Volatile organic compound |
0.00864 ppb | 3.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.187 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Chromium (total) Heavy metal |
0.4 ppb | — | 100.0 | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.01 ppm | — | 4.0 | 1.5 | 1.5 | — | — | 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 NORTH WALES WATER AUTHORITY.