Non-Transient Non-Community Water System · PWS PA1461065
Merck and Co Inc
Operator location West Point, Pennsylvania - 0% of 70 violations are health-based (lower-third health share (≤ 1%)); surface water source; 8,550 served per SDWIS.
- 8,550
- People served (this PWS)
- 70
- EPA violations (this PWS)
- 0
- Health-based (this PWS)
- 1 PFAS
- UCMR5 (this PWS)
Merck and Co Inc standing, mid SDWIS violation third
0% of 70 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: lower-third PFAS panel (≤ 2 compounds). Population rank #5,329 of 29,740 among systems serving 500+.
The verdict
Merck and Co Inc lands in the middle third by violation volume (70), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is large (8,550; 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 1 PFAS compound (lower-third PFAS panel (≤ 2 compounds)).
- #5,329 of 29,740
- Population · /systems
- #173 of 1,340
- Population · PA
- 70
- 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.
1 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Private
- Connections
- 1
- County
- Montgomery
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 69
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Surface Water Treatment Rule | MR | 4 | 2025 |
| Dalapon | MR | 4 | 2022 |
| Chlorine | MR | 4 | 2025 |
| Coliform (TCR) | MR | 3 | 1995 |
| Endrin | MR | 2 | 2020 |
| BHC-GAMMA | MR | 2 | 2020 |
| Methoxychlor | MR | 2 | 2020 |
| Diquat | MR | 2 | 2020 |
| LASSO | MR | 2 | 2020 |
| 2,3,7,8-TCDD | MR | 2 | 2020 |
| Heptachlor | MR | 2 | 2020 |
| 2,4-D | MR | 2 | 2020 |
| Benzo(a)pyrene | MR | 2 | 2020 |
| Pentachlorophenol | MR | 2 | 2020 |
| Total Polychlorinated Biphenyls (PCB) | MR | 2 | 2020 |
| Chlordane | MR | 2 | 2020 |
| Dinoseb | MR | 2 | 2020 |
| Atrazine | MR | 2 | 2020 |
| Toxaphene | MR | 2 | 2020 |
| HEXACHLOROBENZENE | MR | 2 | 2020 |
| Carbofuran | MR | 2 | 2020 |
| ETHYLENE DIBROMIDE | MR | 2 | 2020 |
| Di(2-ethylhexyl) phthalate | MR | 2 | 2020 |
| 2,4,5-TP | MR | 2 | 2020 |
| Hexachlorocyclopentadiene | MR | 2 | 2020 |
| Heptachlor epoxide | MR | 2 | 2020 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 2 | 2020 |
| Di(2-ethylhexyl) adipate | MR | 2 | 2020 |
| OXAMYL | MR | 2 | 2020 |
| Simazine | MR | 2 | 2020 |
Violation Count vs. the National Corpus
Merck and Co Inc has 70 recorded EPA violations, 65% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 35% carry more. 0% of this system's own violations are health-based (0 of 70), and it ranks #5,329 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)
70 Around the middle fewer violations than 35% 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. 3 of 116 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFHpS | 9/16/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 6:2 FTS | 9/16/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 9/16/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 8:2 FTS | 9/16/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMPA | 9/16/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFPeA | 9/16/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 9/16/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 9/16/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 9/16/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFTA | 9/16/2024 | <8.00 ppt | 8.00 ppt | Not Detected |
| NMeFOSAA | 9/16/2024 | <6.00 ppt | 6.00 ppt | Not Detected |
| 9Cl-PF3ONS | 9/16/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFBA | 9/16/2024 | 5.30 ppt | 5.00 ppt | Detected |
| PFTrDA | 9/16/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| NEtFOSAA | 9/16/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFPeS | 9/16/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpA | 9/16/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 9/16/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| HFPO-DA | 9/16/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBS | 9/16/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxS | 9/16/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFNA | 9/16/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 9/16/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOA | 9/16/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFDA | 9/16/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 9/16/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 9/16/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFUnA | 9/16/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| ADONA | 9/16/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 6/17/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFBA | 6/17/2024 | 5.20 ppt | 5.00 ppt | Detected |
| HFPO-DA | 6/17/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| ADONA | 6/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 6/17/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHxA | 6/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 6:2 FTS | 6/17/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFDA | 6/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 9Cl-PF3ONS | 6/17/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFOS | 6/17/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFNA | 6/17/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxS | 6/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 6/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 6/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 6/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NEtFOSAA | 6/17/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFUnA | 6/17/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| NMeFOSAA | 6/17/2024 | <6.00 ppt | 6.00 ppt | Not Detected |
| 4:2 FTS | 6/17/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTrDA | 6/17/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFTA | 6/17/2024 | <8.00 ppt | 8.00 ppt | Not Detected |
Health-based violations on Merck and Co Inc
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 PA1461065.
Sources: EPA SDWIS · Pennsylvania DEP, Bureau of Safe Drinking Water
Nationwide peers
70 violations · 8,550 served: nearest cross-state SDWIS matches.
Cross-state systems near this violation count
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 Merck and Co Inc
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.