Community Water System · PWS PA1460073
Aqua PA Main System
Operator location Bryn Mawr, Pennsylvania - UCMR5 detected 9 PFAS compounds (upper-third PFAS panel (> 4 compounds)) on this PWS; SDWIS lists 453 violations and 822,600 people served.
- 822,600
- People served (this PWS)
- 453
- EPA violations (this PWS)
- 19
- Health-based (this PWS)
- 9 PFAS
- UCMR5 (this PWS)
Aqua PA Main System standing, high SDWIS violation third
UCMR5 detected 9 PFAS compounds - upper-third PFAS panel (> 4 compounds). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 4% is middle-third health share (≤ 23%). UCMR5: upper-third PFAS panel (> 4 compounds). Population rank #33 of 29,740 among systems serving 500+.
The verdict
Aqua PA Main System sits in the upper third of the sitemap cohort by violation count (453), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is large (822,600; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 4% (middle-third health share (≤ 23%)). UCMR5 detected 9 PFAS compounds (upper-third PFAS panel (> 4 compounds)).
- #33 of 29,740
- Population · /systems
- #2 of 1,340
- Population · PA
- 453
- Total EPA violations on record
- 4%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
9 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 304,127
- County
- Montgomery
- School/Daycare
- No
- MCL Violations
- 10
- Monitoring Violations
- 428
- Treatment Tech Violations
- 9
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| 2,3,7,8-TCDD | MR | 30 | 2020 |
| Total Polychlorinated Biphenyls (PCB) | MR | 30 | 2020 |
| Chromium | MR | 12 | 2024 |
| CYANIDE | MR | 12 | 2024 |
| Fluoride | MR | 12 | 2024 |
| Nickel | MR | 12 | 2024 |
| Selenium | MR | 12 | 2024 |
| Antimony, Total | MR | 12 | 2024 |
| Thallium, Total | MR | 12 | 2024 |
| Di(2-ethylhexyl) phthalate | MR | 12 | 2014 |
| Barium | MR | 12 | 2024 |
| Mercury | MR | 12 | 2024 |
| Cadmium | MR | 12 | 2024 |
| Beryllium, Total | MR | 11 | 2024 |
| Chlorite | MR | 9 | 2025 |
| Gross Alpha, Excl. Radon and U | MR | 8 | 2023 |
| Arsenic | MR | 8 | 2024 |
| Coliform (TCR) | MCL | 6 | 2013 |
| Public Notice | Other | 6 | 2024 |
| Dinoseb | MR | 6 | 2014 |
| 2,4,5-TP | MR | 6 | 2014 |
| Interim Enhanced Surface Water Treatment Rule | MR | 6 | 2010 |
| Dalapon | MR | 6 | 2014 |
| Total Haloacetic Acids (HAA5) | MR | 5 | 2015 |
| Surface Water Treatment Rule | TT | 5 | 1992 |
| TTHM | MR | 5 | 2015 |
| BHC-GAMMA | MR | 4 | 2014 |
| OXAMYL | MR | 4 | 2014 |
| Simazine | MR | 4 | 2014 |
| Picloram | MR | 4 | 2014 |
Violation Count vs. the National Corpus
Aqua PA Main System has 453 recorded EPA violations, 95% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 5% carry more. 4% of this system's own violations are health-based (19 of 453), and it ranks #33 of 29,740 by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
453 Higher than most more violations than 95% of 29,740 water systems
the national water-system corpus, bucketed by value
Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS · 2026-05-15
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 225 of 1450 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFHpA | 9/25/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxS | 9/25/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFNA | 9/25/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 9/25/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOA | 9/25/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFDA | 9/25/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 9/25/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 9/25/2024 | 5.20 ppt | 3.00 ppt | Detected |
| PFUnA | 9/25/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 9/25/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBS | 9/25/2024 | 4.20 ppt | 3.00 ppt | Detected |
| HFPO-DA | 9/25/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| ADONA | 9/25/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 6:2 FTS | 9/25/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 9/25/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 8:2 FTS | 9/25/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMPA | 9/25/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFPeA | 9/25/2024 | 6.80 ppt | 3.00 ppt | Detected |
| PFMBA | 9/25/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 9/25/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 9/25/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFPeS | 9/25/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpS | 9/25/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 9Cl-PF3ONS | 9/25/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFBA | 9/25/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFEESA | 9/10/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBA | 9/10/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 6:2 FTS | 9/10/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 9/10/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 8:2 FTS | 9/10/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMPA | 9/10/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| HFPO-DA | 9/10/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMBA | 9/10/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 9/10/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFPeS | 9/10/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpS | 9/10/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 9/10/2024 | 4.40 ppt | 3.00 ppt | Detected |
| PFHxS | 9/10/2024 | 7.70 ppt | 3.00 ppt | Detected |
| ADONA | 9/10/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 9/10/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFNA | 9/10/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 9/10/2024 | 5.00 ppt | 4.00 ppt | Detected |
| PFOA | 9/10/2024 | 4.90 ppt | 4.00 ppt | Detected |
| PFDA | 9/10/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 9/10/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 9/10/2024 | 4.40 ppt | 3.00 ppt | Detected |
| PFUnA | 9/10/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 9/10/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 9Cl-PF3ONS | 9/10/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFBS | 9/10/2024 | 4.20 ppt | 3.00 ppt | Detected |
UCMR5 PFAS record for Aqua PA Main System
Open EPA SDWIS federal reports for PWS PA1460073 to cross-check UCMR5 detections and violation codes; state primacy agencies enforce the Safe Drinking Water Act locally.
Sources: EPA SDWIS · Pennsylvania DEP, Bureau of Safe Drinking Water
Nationwide peers
453 violations · 822,600 served: nearest cross-state SDWIS matches.
Cross-state systems with comparable violation load
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
Cross-state systems with similar served population
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Aqua PA Main System
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Pennsylvania compares on the same EPA violation measures. Pennsylvania systems
- Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
- Find and compare another public water system by name or PWSID. Search systems
EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.