County · Pennsylvania
Montgomery County, Pennsylvania: drinking water records
This overview covers 58 ZIP codes and 38 community water systems in Montgomery County. It also stands in for 2 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Aqua Pa Main System PA1460073 | 822,600 | 1,500 | 9 | 2 | 0 ppb |
| Pottstown Borough Water Auth PA1460037 | 36,000 | 120 | 4 | 2 | 0.9 ppb |
| Horsham Water&sewer Authority PA1460033 | 26,000 | 780 | 8 | 1 | 0 ppb |
| Collegeville Trappe Joint Pwd PA1460022 | 8,470 | 390 | 8 | 1 | 3 ppb |
| Schwenksville Borough Auth PA1460042 | 5,200 | 240 | 3 | 1 | 0 ppb |
| North Penn Water Authority PA1460034 | 91,941 | 360 | 3 | 0 | 0.5 ppb |
| Pa American Norristown PA1460046 | 88,885 | 120 | 4 | 0 | 2 ppb |
| North Wales Water Authority PA1460048 | 72,496 | 480 | 9 | 0 | 1.6 ppb |
| Ambler Boro Water Dept PA1460020 | 20,000 | 600 | 10 | 0 | 2.3 ppb |
| Aqua Pa Hatboro PA1460028 | 12,901 | 240 | 8 | 0 | 0 ppb |
| Aqua Pa Superior Main System PA1460085 | 11,400 | 540 | 6 | 0 | 0 ppb |
| Pa American Audubon PA1460055 | 8,200 | 480 | 9 | 0 | 4 ppb |
| Telford Borough Authority PA1460050 | 7,700 | 540 | 9 | 0 | 3 ppb |
| Upper Hanover Water Authority PA1460036 | 4,600 | 240 | 4 | 0 | 1 ppb |
| Aqua Pa Perkiomen Township PA1460069 | 3,600 | 300 | 7 | 0 | 0 ppb |
| Parkhouse Nursing & Rehab Ctr PA1460008 | 1,200 | 0 | 0 | 2 | 0.9 ppb |
| Yerkes Water Association PA1460064 | 165 | 0 | 0 | 8 | 160 ppb |
| E Greenville Boro Water Dept PA1460023 | 3,100 | 0 | 0 | 0 | 4 ppb |
| Red Hill Water Authority PA1460039 | 2,500 | 0 | 0 | 0 | 25.3 ppb |
| Village of Neshaminy Falls PA1460077 | 1,300 | 0 | 0 | 0 | 2 ppb |
| Aqua Pa Perkiomen Woods PA1460068 | 1,100 | 0 | 0 | 0 | 2 ppb |
| Frederick Living PA1460075 | 640 | 0 | 0 | 0 | 5 ppb |
| Perkiomen Crossing PA1460087 | 508 | 0 | 0 | 0 | 1 ppb |
| Aqua Pa Superior Center Point PA1460092 | 500 | 0 | 0 | 1 | not reported |
| Green Hill MHP PA1460027 | 323 | 0 | 0 | 0 | 9.5 ppb |
ZIP reports in Montgomery County
No ZIP report in this county is published yet.
These ZIP codes are covered by this overview because their utility has too little EPA data for a separate page: 19453, 19492.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.