Community Water System · PWS PA7220034
Millersburg Water Auth
Operator location Millersburg, Pennsylvania - larger served population (> 3,309) at 4,600 people served; 221 SDWIS violations on record from surface water sources.
- 4,600
- People served (this PWS)
- 221
- EPA violations (this PWS)
- 2
- Health-based (this PWS)
- 4 PFAS
- UCMR5 (this PWS)
Millersburg Water Auth standing, high SDWIS violation third
4,600 people served (SDWIS) - larger served population (> 3,309). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 1% is middle-third health share (≤ 23%). UCMR5: middle-third PFAS panel (≤ 4 compounds). Population rank #8,120 of 29,740 among systems serving 500+.
The verdict
Millersburg Water Auth sits in the upper third of the sitemap cohort by violation count (221), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is large (4,600; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 1% (middle-third health share (≤ 23%)). UCMR5 detected 4 PFAS compounds (middle-third PFAS panel (≤ 4 compounds)).
- #8,120 of 29,740
- Population · /systems
- #290 of 1,340
- Population · PA
- 221
- Total EPA violations on record
- 1%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
4 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 1,978
- County
- Dauphin
- School/Daycare
- No
- MCL Violations
- 1
- Monitoring Violations
- 210
- Treatment Tech Violations
- 1
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 8 | 2010 |
| Surface Water Treatment Rule | MR | 7 | 2011 |
| BHC-GAMMA | MR | 7 | 2023 |
| Endrin | MR | 7 | 2023 |
| Methoxychlor | MR | 7 | 2023 |
| Hexachlorocyclopentadiene | MR | 6 | 2023 |
| LASSO | MR | 6 | 2023 |
| HEXACHLOROBENZENE | MR | 6 | 2023 |
| Heptachlor epoxide | MR | 6 | 2023 |
| Heptachlor | MR | 6 | 2023 |
| 1,2,4-Trichlorobenzene | MR | 5 | 1995 |
| DICHLOROMETHANE | MR | 5 | 1995 |
| p-Dichlorobenzene | MR | 5 | 1995 |
| 1,2-Dichloropropane | MR | 5 | 1995 |
| Trichloroethylene | MR | 5 | 1995 |
| 1,1,2-Trichloroethane | MR | 5 | 1995 |
| Tetrachloroethylene | MR | 5 | 1995 |
| CHLOROBENZENE | MR | 5 | 1995 |
| Benzene | MR | 5 | 1995 |
| Ethylbenzene | MR | 5 | 1995 |
| 1,1,1-Trichloroethane | MR | 5 | 1995 |
| Toluene | MR | 5 | 1995 |
| 1,1-Dichloroethylene | MR | 5 | 1995 |
| 1,2-Dichloroethane | MR | 5 | 1995 |
| cis-1,2-Dichloroethylene | MR | 5 | 1995 |
| Carbon tetrachloride | MR | 5 | 1995 |
| Xylenes, Total | MR | 5 | 1995 |
| trans-1,2-Dichloroethylene | MR | 5 | 1995 |
| Styrene | MR | 5 | 1995 |
| o-Dichlorobenzene | MR | 5 | 1995 |
Violation Count vs. the National Corpus
Millersburg Water Auth has 221 recorded EPA violations, 87% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 13% carry more. 1% of this system's own violations are health-based (2 of 221), and it ranks #8,120 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)
221 Higher than most more violations than 87% 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. 8 of 174 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFHxS | 8/22/2023 | 3.50 ppt | 3.00 ppt | Detected |
| 6:2 FTS | 8/22/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 8/22/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 8:2 FTS | 8/22/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 8/22/2023 | <6.00 ppt | 6.00 ppt | Not Detected |
| NEtFOSAA | 8/22/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 8/22/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFTA | 8/22/2023 | <8.00 ppt | 8.00 ppt | Not Detected |
| NFDHA | 8/22/2023 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFPeS | 8/22/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpS | 8/22/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTrDA | 8/22/2023 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFOA | 8/22/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFDA | 8/22/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 8/22/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMPA | 8/22/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFDoA | 8/22/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 8/22/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFUnA | 8/22/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFMBA | 8/22/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOS | 8/22/2023 | 5.60 ppt | 4.00 ppt | Detected |
| PFNA | 8/22/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 8/22/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| 9Cl-PF3ONS | 8/22/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFBS | 8/22/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| ADONA | 8/22/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 8/22/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHpA | 8/22/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 8/22/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 8/22/2023 | 3.20 ppt | 3.00 ppt | Detected |
| PFTrDA | 8/22/2023 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFHxA | 8/22/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| NMeFOSAA | 8/22/2023 | <6.00 ppt | 6.00 ppt | Not Detected |
| NEtFOSAA | 8/22/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHxS | 8/22/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 8/22/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTA | 8/22/2023 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFBA | 8/22/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHpS | 8/22/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeS | 8/22/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| NFDHA | 8/22/2023 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFEESA | 8/22/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 8/22/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 8/22/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMPA | 8/22/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| 8:2 FTS | 8/22/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFDA | 8/22/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 6:2 FTS | 8/22/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFNA | 8/22/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| HFPO-DA | 8/22/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
Population served record for Millersburg Water Auth
EPA SDWIS lists 4,600 people served and 1,978 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS · Pennsylvania DEP, Bureau of Safe Drinking Water
Nationwide peers
221 violations · 4,600 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 Millersburg Water Auth
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.