States › Pennsylvania › Montgomery County

Montgomery County, PA Water Quality

Water quality data for 20 public water systems serving Montgomery County, Pennsylvania — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 20 water systems · 71 cities
⚠️
Caution Advised — Some Systems Need Attention

Some systems have elevated lead levels or active violations. Check your specific city below.

C

Montgomery County Earns a C

Montgomery County: 71 communities across 20 water systems. 100.0% have no open violations.

  • Median lead where detected: 1.60 ppb
  • 38 communities with a lead detection, 32 reporting none detected
  • 54 communities with PFAS above the federal limit
  • 17 with significant inspection deficiencies
  • 100.0% of communities have no open violations
1.6 ppb
Median Lead Level
County-wide, 90th percentile
20
Water Systems
Active CWS & NTNCWS
100%
Violation-Free
No active violations on record
How we grade counties: MyWaterIQ uses EPA SDWIS enforcement data — actual MCL violations and lead test results — not the aspirational MCLG targets used by some sites. A grade reflects real compliance history, not theoretical risk. Learn more →

Cities by Water Quality

⭐ Best Performing
  • Norristown
    2.00 ppb
    No federal limits exceeded on record
    A
  • West Norriton
    2.00 ppb
    No federal limits exceeded on record
    A
  • Lower Providence
    2.00 ppb
    No federal limits exceeded on record
    A
  • East Norriton
    2.00 ppb
    No federal limits exceeded on record
    A
  • Whitpain
    2.00 ppb
    No federal limits exceeded on record
    A
⚠ Needs Attention
  • Ambler
    2.30 ppb
    PFAS above the limit at 8 of 9 sampling points
    D
  • Hatboro
    Not detected
    PFAS above the limit at 2 of 3 sampling points
    D
  • Lower Merion
    Not detected
    PFAS above the limit at 13 of 19 sampling points
    C
  • Abington
    Not detected
    PFAS above the limit at 13 of 19 sampling points
    C
  • Cheltenham
    Not detected
    PFAS above the limit at 13 of 19 sampling points
    C
County Lead Level — Median 1.6 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 1.6 ppb — 10.7% of the federal action level
Systems by Lead Level
Under 5 ppb
36
5 – 10 ppb
1
10 – 15 ppb
1
No Data
33

All Cities in Montgomery County

Lower Merion Not detected C
Abington Not detected C
Cheltenham Not detected C
Norristown 2.00 ppb A
Upper Merion Not detected C
Horsham Not detected C
Montgomery 1.60 ppb C
Pottstown 0.90 ppb A
Upper Providence 2.00 ppb C
Springfield Not detected C
Limerick 2.00 ppb C
Whitemarsh Not detected C
Lansdale 0.50 ppb C
Hatfield 0.50 ppb C
Towamencin 0.50 ppb C
Upper Moreland Not detected C
Plymouth Not detected C
West Norriton 2.00 ppb A
Lower Salford 0.50 ppb C
Upper Gwynedd 1.60 ppb C
Skippack 0.50 ppb C
Lower Providence 2.00 ppb A
Lower Moreland Not detected C
East Norriton 2.00 ppb A
Willow Grove Not detected C
Ardmore Not detected C
Whitpain 2.00 ppb A
Franconia 0.50 ppb C
Upper Dublin Not detected C
Lower Gwynedd 1.60 ppb C
New Hanover Not detected C
Conshohocken Not detected C
Lower Pottsgrove 0.90 ppb A
Hatboro Not detected D
Glenside Not detected C
Plymouth Meeting Not detected C
Souderton 0.50 ppb C
Ambler 2.30 ppb D
Perkiomen Not detected B
Worcester 0.50 ppb C
Oreland Not detected C
Bryn Mawr Not detected C
Douglass Not detected C
Upper Hanover 1.00 ppb B
Bridgeport 2.00 ppb A
Collegeville 3.00 ppb C
Telford 3.00 ppb C
Flourtown Not detected C
Jenkintown Not detected C
Narberth Not detected C
Royersford 2.00 ppb C
Trappe 3.00 ppb C
Pennsburg 1.00 ppb B
West Pottsgrove 0.90 ppb A
Lower Frederick Not detected C
Maple Glen Not detected C
Hatfield 0.50 ppb C
North Wales 1.60 ppb C
Upper Pottsgrove Not detected C
East Greenville 4.00 ppb B
Rockledge Not detected C
Red Hill 25.30 ppb C
Evansburg 2.00 ppb A
West Conshohocken Not detected C
Schwenksville Not detected C
Bryn Athyn Not detected C
Upper Frederick 1.00 ppb B
Green Lane Not reported B
Marlborough 9.50 ppb B
Upper Salford 0.50 ppb C
Salford 0.50 ppb C
Showing 71 cities
No active violations Active violations

About Montgomery County Drinking Water

Montgomery County is served by 20 water systems covering 71 communities. No community here has an open violation on record.

Of the communities reporting lead results, 38 recorded a detection, with a median of 1.60 ppb — 11% of the federal action level. 32 reported none detected, which means below the laboratory limit rather than an absence of lead.

54 of 71 communities have PFAS above the limits EPA set in 2024, measured as a running annual average at each sampling point. State inspectors recorded significant deficiencies at 17 of them.

Frequently Asked Questions

Is Montgomery County tap water safe to drink?▼
No community in Montgomery County has an open violation on record. 54 of 71 have PFAS above the federal limit, which is the main open concern.
What is the lead level in Montgomery County?▼
Among communities with a detection the median is 1.60 ppb, 11% of the 15 ppb action level. 32 reported none detected and 1 reported no result.
How many water systems serve Montgomery County?▼
20 community water systems serve 71 communities here.
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