Community Water System · PWS PA1150035
Aqua PA Uwchlan
Operator location Bryn Mawr, Pennsylvania - 0% of 237 violations are health-based (lower-third health share (≤ 1%)); surface water source; 35,518 served per SDWIS.
- 35,518
- People served (this PWS)
- 237
- EPA violations (this PWS)
- 0
- Health-based (this PWS)
- 6 PFAS
- UCMR5 (this PWS)
Aqua PA Uwchlan standing, high SDWIS violation third
0% of 237 recorded violations are health-based - lower-third health share (≤ 1%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 0% is lower-third health share (≤ 1%). UCMR5: upper-third PFAS panel (> 4 compounds). Population rank #1,566 of 29,740 among systems serving 500+.
The verdict
Aqua PA Uwchlan sits in the upper third of the sitemap cohort by violation count (237), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is large (35,518; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is only 0% - almost all of this trail is monitoring or reporting. UCMR5 detected 6 PFAS compounds (upper-third PFAS panel (> 4 compounds)).
- #1,566 of 29,740
- Population · /systems
- #61 of 1,340
- Population · PA
- 237
- Total EPA violations on record
- 0%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
6 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 16,600
- County
- Chester
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 229
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Di(2-ethylhexyl) adipate | MR | 33 | 1996 |
| Benzo(a)pyrene | MR | 33 | 1996 |
| Di(2-ethylhexyl) phthalate | MR | 33 | 1996 |
| Pentachlorophenol | MR | 33 | 1996 |
| Hexachlorocyclopentadiene | MR | 33 | 1996 |
| CYANIDE | MR | 12 | 2000 |
| Nitrate | MR | 10 | 2001 |
| Fluoride | MR | 5 | 1996 |
| Chlorine | MR | 4 | 2017 |
| Revised Total Coliform Rule | MON | 4 | 2017 |
| Surface Water Treatment Rule | MR | 4 | 2017 |
| Arsenic | MR | 2 | 1985 |
| Chromium | MR | 2 | 1985 |
| Selenium | MR | 2 | 1985 |
| Endrin | MR | 2 | 1985 |
| Methoxychlor | MR | 2 | 1985 |
| 2,4-D | MR | 2 | 1985 |
| 2,4,5-TP | MR | 2 | 1985 |
| Cadmium | MR | 2 | 1985 |
| Mercury | MR | 2 | 1985 |
| Barium | MR | 2 | 1985 |
| Toxaphene | MR | 2 | 1985 |
| BHC-GAMMA | MR | 2 | 1985 |
| Consumer Confidence Rule | Other | 1 | 2001 |
| Groundwater Rule | MR | 1 | 2020 |
Violation Count vs. the National Corpus
Aqua PA Uwchlan has 237 recorded EPA violations, 88% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 12% carry more. 0% of this system's own violations are health-based (0 of 237), and it ranks #1,566 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)
237 Higher than most more violations than 88% 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. 45 of 464 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| 4:2 FTS | 8/13/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| ADONA | 8/13/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 8/13/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 8/13/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 6:2 FTS | 8/13/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 9Cl-PF3ONS | 8/13/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFMPA | 8/13/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFMBA | 8/13/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 8/13/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| NFDHA | 8/13/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| 8:2 FTS | 8/13/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFPeS | 8/13/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpS | 8/13/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 8/13/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 8/13/2024 | 5.10 ppt | 3.00 ppt | Detected |
| PFUnA | 8/13/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFBS | 8/13/2024 | 4.00 ppt | 3.00 ppt | Detected |
| PFHpA | 8/13/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxS | 8/13/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFNA | 8/13/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 8/13/2024 | 5.00 ppt | 4.00 ppt | Detected |
| PFOA | 8/13/2024 | 6.20 ppt | 4.00 ppt | Detected |
| PFDA | 8/13/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 8/13/2024 | 5.20 ppt | 3.00 ppt | Detected |
| PFDoA | 8/13/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| ADONA | 7/29/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 6:2 FTS | 7/29/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFOA | 7/29/2024 | 5.30 ppt | 4.00 ppt | Detected |
| 9Cl-PF3ONS | 7/29/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFBA | 7/29/2024 | 5.70 ppt | 5.00 ppt | Detected |
| PFUnA | 7/29/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFHxA | 7/29/2024 | 6.70 ppt | 3.00 ppt | Detected |
| PFDoA | 7/29/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 7/29/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 7/29/2024 | 5.10 ppt | 3.00 ppt | Detected |
| PFPeA | 7/29/2024 | 7.70 ppt | 3.00 ppt | Detected |
| 11Cl-PF3OUdS | 7/29/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| HFPO-DA | 7/29/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 8:2 FTS | 7/29/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 7/29/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 7/29/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 7/29/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 7/29/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFPeS | 7/29/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpS | 7/29/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMPA | 7/29/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFNA | 7/29/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpA | 7/29/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxS | 7/29/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NEtFOSAA | 7/29/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
Health-based violations on Aqua PA Uwchlan
0 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for PA1150035.
Sources: EPA SDWIS · Pennsylvania DEP, Bureau of Safe Drinking Water
Nationwide peers
237 violations · 35,518 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 Uwchlan
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.