Water Quality Report · Updated May 12, 2026
NORTH WALES WATER AUTHORITY
NORTH WALES WATER AUTHORITY delivers tap water graded D (64/100) by TapWaterSafety.org. The utility serves approximately 72,496 residents in NORTH WALES, Pennsylvania using surface water. 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. For questions, the utility can be reached at 215-699-4836.
Is NORTH WALES tap water safe to drink?
NORTH WALES WATER AUTHORITY delivers tap water that earns a grade of D (64/100) from TapWaterSafety.org — a below-average rating, with multiple concerns including haloacetic acids (haa9) significantly above health guideline.
The utility serves 72,496 residents in NORTH WALES, drawing from surface water.
Public testing data identifies 14 contaminants in this water above EWG's health-based guidelines, including: Haloacetic acids (HAA9), Total trihalomethanes (TTHMs), Haloacetic acids (HAA5), Bromodichloromethane, Trichloroacetic acid, Arsenic, Chloroform, Dichloroacetic acid, Dibromochloromethane, Bromate, Nitrate, Dibromoacetic acid, Chromium (hexavalent), Uranium. For most residents, a properly certified home filter at the kitchen tap is the most cost-effective way to reduce exposure to whatever's in your water. See our filter recommendations below, matched specifically to this utility's contaminant profile.
Quick actions for NORTH WALES residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for NORTH WALES WATER AUTHORITY.
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.
Contact NORTH WALES WATER AUTHORITY
Reach the utility directly for service issues, water quality concerns, or to request your Consumer Confidence Report.
General Contact
Treatment Plant
Recommended water filters for NORTH WALES
Filters matched to the specific contaminants in this water supply.
Carbon block (NSF/ANSI 42 + 53)
$40-$750Activated carbon is highly effective for disinfection byproducts like TTHM and HAA5.
Reverse Osmosis
$249-$750Arsenic is most effectively removed by reverse osmosis. Some specialized adsorptive filters also work.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
Score breakdown
This utility's overall score of 64/100 breaks down across five weighted components. Read the full methodology →
Contaminants detected — international standards comparison
Every contaminant detected, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal (the strictest US benchmark). 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 (4th ed.), California OEHHA PHGs, EWG Tap Water Database.
NORTH WALES WATER AUTHORITY service area
This water system serves 1 community in Montgomery County, Pennsylvania. Click any city for its dedicated tap water quality page.
Find the right filter for NORTH WALES water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.