Community Water System · PWS PA7360045
Ephrata Area Joint Authority
Operator location Ephrata, Pennsylvania - UCMR5 detected 6 PFAS compounds (upper-third PFAS panel (> 4 compounds)) on this PWS; SDWIS lists 182 violations and 24,500 people served.
- 24,500
- People served (this PWS)
- 182
- EPA violations (this PWS)
- 9
- Health-based (this PWS)
- 6 PFAS
- UCMR5 (this PWS)
Ephrata Area Joint Authority standing, high SDWIS violation third
UCMR5 detected 6 PFAS compounds - upper-third PFAS panel (> 4 compounds). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 5% is middle-third health share (≤ 23%). UCMR5: upper-third PFAS panel (> 4 compounds). Population rank #2,279 of 29,740 among systems serving 500+.
The verdict
Ephrata Area Joint Authority sits in the upper third of the sitemap cohort by violation count (182), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is large (24,500; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 5% (middle-third health share (≤ 23%)). UCMR5 detected 6 PFAS compounds (upper-third PFAS panel (> 4 compounds)).
- #2,279 of 29,740
- Population · /systems
- #82 of 1,340
- Population · PA
- 182
- Total EPA violations on record
- 5%
- 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
- Local
- Connections
- 8,607
- County
- Lancaster
- School/Daycare
- No
- MCL Violations
- 2
- Monitoring Violations
- 161
- Treatment Tech Violations
- 7
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| CARBON, TOTAL | MR | 11 | 2025 |
| Surface Water Treatment Rule | MR | 9 | 1992 |
| Nitrate | MR | 9 | 2011 |
| Nitrite | MR | 7 | 2011 |
| Coliform (TCR) | MR | 6 | 2009 |
| Total Polychlorinated Biphenyls (PCB) | MR | 6 | 2011 |
| Benzene | MR | 6 | 2012 |
| 1,2,4-Trichlorobenzene | MR | 5 | 2012 |
| cis-1,2-Dichloroethylene | MR | 5 | 2012 |
| DICHLOROMETHANE | MR | 5 | 2012 |
| o-Dichlorobenzene | MR | 5 | 2012 |
| p-Dichlorobenzene | MR | 5 | 2012 |
| 1,2-Dichloroethane | MR | 5 | 2012 |
| Trichloroethylene | MR | 5 | 2012 |
| Tetrachloroethylene | MR | 5 | 2012 |
| Ethylbenzene | MR | 5 | 2012 |
| Xylenes, Total | MR | 5 | 2012 |
| 1,1-Dichloroethylene | MR | 5 | 2012 |
| trans-1,2-Dichloroethylene | MR | 5 | 2012 |
| 1,1,2-Trichloroethane | MR | 5 | 2012 |
| CHLOROBENZENE | MR | 5 | 2012 |
| Toluene | MR | 5 | 2012 |
| Styrene | MR | 5 | 2012 |
| Surface Water Treatment Rule | TT | 4 | 1994 |
| 1,1,1-Trichloroethane | MR | 3 | 2010 |
| Carbon tetrachloride | MR | 3 | 2012 |
| 1,2-Dichloropropane | MR | 3 | 2012 |
| CARBON, TOTAL | TT | 3 | 2013 |
| Chlorine | MR | 3 | 2009 |
| Di(2-ethylhexyl) adipate | MR | 2 | 2011 |
Violation Count vs. the National Corpus
Ephrata Area Joint Authority has 182 recorded EPA violations, 84% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 16% carry more. 5% of this system's own violations are health-based (9 of 182), and it ranks #2,279 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)
182 Higher than most more violations than 84% 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. 24 of 232 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFHpS | 9/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 4:2 FTS | 9/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 8:2 FTS | 9/17/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMPA | 9/17/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFPeA | 9/17/2024 | 6.90 ppt | 3.00 ppt | Detected |
| PFMBA | 9/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 9/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 6:2 FTS | 9/17/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFPeS | 9/17/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFTA | 9/17/2024 | <8.00 ppt | 8.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 9/17/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHpA | 9/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTrDA | 9/17/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFBS | 9/17/2024 | 5.20 ppt | 3.00 ppt | Detected |
| NMeFOSAA | 9/17/2024 | <6.00 ppt | 6.00 ppt | Not Detected |
| NFDHA | 9/17/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFUnA | 9/17/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFBA | 9/17/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHxS | 9/17/2024 | 3.60 ppt | 3.00 ppt | Detected |
| PFNA | 9/17/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 9/17/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| NEtFOSAA | 9/17/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 9Cl-PF3ONS | 9/17/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFHxA | 9/17/2024 | 5.90 ppt | 3.00 ppt | Detected |
| PFDoA | 9/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 9/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| ADONA | 9/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 9/17/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFOA | 9/17/2024 | 5.80 ppt | 4.00 ppt | Detected |
| NFDHA | 6/18/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFUnA | 6/18/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFHxS | 6/18/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpS | 6/18/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeS | 6/18/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFEESA | 6/18/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 6/18/2024 | 5.80 ppt | 3.00 ppt | Detected |
| PFMPA | 6/18/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| 8:2 FTS | 6/18/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 6/18/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 6:2 FTS | 6/18/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 6/18/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| HFPO-DA | 6/18/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| ADONA | 6/18/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 6/18/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 6/18/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHxA | 6/18/2024 | 4.80 ppt | 3.00 ppt | Detected |
| PFDoA | 6/18/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 6/18/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 6/18/2024 | 5.20 ppt | 4.00 ppt | Detected |
| PFOS | 6/18/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
UCMR5 PFAS record for Ephrata Area Joint Authority
Open EPA SDWIS federal reports for PWS PA7360045 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
182 violations · 24,500 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 Ephrata Area Joint Authority
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.