PlainWater
Counties → Pennsylvania

Montgomery County, Pennsylvania

Water Systems
172
Population Served
1,274,688
Total Violations
36,032
1,106 health-based
PFAS Detected
17
of 17 tested

Violation Analysis

97.7%
Systems with Violations
209.5
Avg Violations per System
3.1%
Health-Based Violations

Water Source Types

GW
30 systems (17%)
SW
20 systems (12%)

PFAS Contamination

17
Systems Tested
17
PFAS Detected
100.0%
Detection Rate

PFAS (per- and polyfluoroalkyl substances) are persistent chemicals found in drinking water. The EPA has set enforceable limits for several PFAS compounds under UCMR5 monitoring.

Compliance Snapshot

Montgomery Pennsylvania water systems by violation status, EPA SDWIS records.

No violations on record (1) One or more violations (49)

Violation history is cumulative, many flagged systems have already returned to compliance. Detail pages show per-system context.

Water Systems

System Name Population Violations PFAS
Aqua PA Main System 822,600 453 Detected
North Penn Water Authority 91,941 209 Detected
PA American Norristown 88,885 92 Detected
North Wales Water Authority 72,496 422 Detected
Pottstown Borough Water Auth 36,000 172 Detected
Horsham Water&sewer Authority 26,000 572 Detected
Ambler Boro Water Dept 20,000 2,896 Detected
Aqua PA Hatboro 12,901 402 Detected
Aqua PA Superior Main System 11,400 1,406 Detected
Merck and Co Inc 8,550 70 Detected
Collegeville Trappe Joint Pwd 8,470 434 Detected
PA American Audubon 8,200 5,456 Detected
Telford Borough Authority 7,700 224 Detected
Schwenksville Borough Auth 5,200 158 Detected
Upper Hanover Water Authority 4,600 1,170 Detected
Aqua PA Perkiomen Township 3,600 136 Detected
Radisson Valley Forge Hotel 3,500 685 Detected
E Greenville Boro Water Dept 3,100 69 -
Red Hill Water Authority 2,500 761 -
Valley Forge Natl Park 2,300 101 -
Hatfield Quality Meats Inc 1,850 48 -
Constellation Nuclear Pwr Plnt 1,650 123 -
Upper Dublin High School 1,473 49 -
Pottstown Hosp Tower Health 1,425 10 -
Village of Neshaminy Falls 1,300 56 -
Parkhouse Nursing & Rehab Ctr 1,200 466 -
Aqua PA Perkiomen Woods 1,100 39 -
Spring Mountain Adventures 1,000 11 -
New Hanover Upper Fred E S 850 138 -
Aqua PA Upper Providence 810 0 -
Gilbertsville Elementary 800 134 -
Marlborough Elementary School 800 126 -
Jefferson Hospital Lansdale 700 25 -
Frederick Living 640 241 -
Camp Hart Musser Reservation 600 76 -
Fort Washington Elem School 532 20 -
Perkiomen Crossing 508 66 -
Aqua PA Superior Center Point 500 644 -
Salford Hills Elem School 500 486 -
Hickory Valley G C Snack Bar 500 7 -
Horsham Clinic 488 94 -
Biddle Air National Guard Base 440 178 -
Camp Hope for Kids 410 99 -
Limerick Diner 400 97 -
Indian Valley Country Club 400 45 -
Flourtown Swim Club 350 118 -
Camp Green Lane 350 104 -
Lehigh Valley Dairies Ntnc 328 67 -
Green Hill MHP 323 296 -
Avante Apartments 315 392 -

Other Counties in Pennsylvania

Allegheny County
69 systems · 2,014,752 served · 5,241 violations
Philadelphia County
6 systems · 1,601,175 served · 447 violations
Bucks County
299 systems · 599,107 served · 59,577 violations
Lancaster County
434 systems · 406,457 served · 39,193 violations
York County
208 systems · 389,602 served · 25,528 violations
Berks County
493 systems · 382,268 served · 54,767 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Montgomery County? ▼
Montgomery County has 36,032 total drinking water violations across 172 water systems, of which 1,106 are health-based violations. 97.7% of systems have at least one violation.
How many people get water from Montgomery County systems? ▼
Water systems in Montgomery County serve approximately 1,274,688 people through 172 public water systems.
Has PFAS been detected in Montgomery County water? ▼
Of 17 water systems tested for PFAS in Montgomery County, 17 had PFAS detected (100.0% detection rate).
What types of water sources supply Montgomery County? ▼
Water systems in Montgomery County use GW (30 systems), SW (20 systems) as their primary water sources.
Are health-based violations serious? ▼
Health-based violations indicate that drinking water exceeded Maximum Contaminant Levels (MCLs) set by the EPA or failed treatment technique requirements. 3.1% of Montgomery County's violations are health-based. Not all violations indicate immediate health risk, but they require corrective action.
Data Sources & Methodology

Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). PFAS testing data from the UCMR5 monitoring program. SDWIS tracks all public water systems regulated under the Safe Drinking Water Act.

Violations are categorized as health-based (Maximum Contaminant Level exceedances, treatment technique failures) or monitoring/reporting violations. Not all violations indicate an immediate health risk.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.