Community Water System · PWS PA5100079
Slippery Rock Muni Auth
Operator location Slippery Rock, Pennsylvania - larger served population (> 3,309) at 15,778 people served; 173 SDWIS violations on record from groundwater sources.
- 15,778
- People served (this PWS)
- 173
- EPA violations (this PWS)
- 4
- Health-based (this PWS)
- No PFAS
- UCMR5 (this PWS)
Slippery Rock Muni Auth standing, high SDWIS violation third
15,778 people served (SDWIS) - larger served population (> 3,309). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 2% is middle-third health share (≤ 23%). UCMR5: UCMR5 tested, none detected. Population rank #3,322 of 29,740 among systems serving 500+.
The verdict
Slippery Rock Muni Auth sits in the upper third of the sitemap cohort by violation count (173), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is large (15,778; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 2% (middle-third health share (≤ 23%)). UCMR5 tested this system and reported no PFAS above the minimum reporting level.
- #3,322 of 29,740
- Population · /systems
- #111 of 1,340
- Population · PA
- 173
- Total EPA violations on record
- 2%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 1,978
- County
- Butler
- School/Daycare
- No
- MCL Violations
- 4
- Monitoring Violations
- 161
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Chlorine | MR | 22 | 2008 |
| Di(2-ethylhexyl) phthalate | MR | 12 | 2017 |
| 2,3,7,8-TCDD | MR | 10 | 2017 |
| Total Haloacetic Acids (HAA5) | MR | 9 | 2020 |
| TTHM | MR | 9 | 2020 |
| Dalapon | MR | 6 | 2023 |
| Endrin | MR | 5 | 2017 |
| BHC-GAMMA | MR | 5 | 2017 |
| Methoxychlor | MR | 5 | 2017 |
| Hexachlorocyclopentadiene | MR | 5 | 2017 |
| Atrazine | MR | 5 | 2017 |
| LASSO | MR | 5 | 2017 |
| Benzo(a)pyrene | MR | 5 | 2017 |
| HEXACHLOROBENZENE | MR | 5 | 2017 |
| Simazine | MR | 5 | 2017 |
| Heptachlor | MR | 5 | 2017 |
| Heptachlor epoxide | MR | 5 | 2017 |
| Di(2-ethylhexyl) adipate | MR | 5 | 2017 |
| Total Polychlorinated Biphenyls (PCB) | MR | 5 | 2017 |
| Gross Alpha, Excl. Radon and U | MR | 4 | 2017 |
| Combined Uranium | MR | 4 | 2017 |
| Radium-228 | MR | 4 | 2017 |
| Groundwater Rule | MR | 4 | 2023 |
| Radium-226 | MR | 4 | 2017 |
| Coliform (TCR) | MCL | 4 | 2007 |
| Consumer Confidence Rule | Other | 3 | 2003 |
| Asbestos | MR | 3 | 2018 |
| Revised Total Coliform Rule | RPT | 3 | 2024 |
| Nitrate | MR | 3 | 1995 |
| Coliform (TCR) | MR | 2 | 2005 |
Violation Count vs. the National Corpus
Slippery Rock Muni Auth has 173 recorded EPA violations, 83% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 17% carry more. 2% of this system's own violations are health-based (4 of 173), and it ranks #3,322 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)
173 Higher than most more violations than 83% 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. 0 of 116 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFTrDA | 9/21/2023 | <7.00 ppt | 7.00 ppt | Not Detected |
| NEtFOSAA | 9/21/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 9/21/2023 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFTA | 9/21/2023 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFTA | 9/21/2023 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFTrDA | 9/21/2023 | <7.00 ppt | 7.00 ppt | Not Detected |
| NMeFOSAA | 9/21/2023 | <6.00 ppt | 6.00 ppt | Not Detected |
| NEtFOSAA | 9/21/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFPeS | 3/27/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFTA | 3/27/2023 | <8.00 ppt | 8.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 3/27/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFUnA | 3/27/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFHxA | 3/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 3/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 3/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 3/27/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 3/27/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFNA | 3/27/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxS | 3/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 3/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpS | 3/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTrDA | 3/27/2023 | <7.00 ppt | 7.00 ppt | Not Detected |
| NFDHA | 3/27/2023 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFEESA | 3/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 3/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 3/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMPA | 3/27/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| 8:2 FTS | 3/27/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| ADONA | 3/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 4:2 FTS | 3/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 6:2 FTS | 3/27/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 3/27/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| HFPO-DA | 3/27/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBS | 3/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| NMeFOSAA | 3/27/2023 | <6.00 ppt | 6.00 ppt | Not Detected |
| NEtFOSAA | 3/27/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| 9Cl-PF3ONS | 3/27/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFBA | 3/27/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFTrDA | 3/27/2023 | <7.00 ppt | 7.00 ppt | Not Detected |
| NEtFOSAA | 3/27/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 3/27/2023 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFBS | 3/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 3/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxS | 3/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 3/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 3/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 3/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 3/27/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| 9Cl-PF3ONS | 3/27/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFPeS | 3/27/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
Population served record for Slippery Rock Muni Auth
EPA SDWIS lists 15,778 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
173 violations · 15,778 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 Slippery Rock Muni 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.