Community Water System · PWS PA7210029
PA American Water Co West
Mechanicsburg, Pennsylvania 17055 - drinking water served from surface water sources to 105,127 people, tracked in EPA SDWIS and UCMR5.
- 105,127
- People served
- 24
- EPA violations
- 3
- Health-based
- 4 PFAS
- UCMR5 result
The verdict
EPA records 24 drinking-water violations at PA American Water Co West, 13% of them health-based - below the Pennsylvania per-system average, and UCMR5 testing detected 4 PFAS compounds.
- 24
- Total EPA violations on record
- 13%
- Health-based (MCL / treatment failure)
- 105,127
- People served by this system
- 4
- PFAS compounds detected (UCMR5)
Water Quality Snapshot: PA American Water Co West
PA American Water Co West is a public/private-owned community water system that delivers drinking water to 105,127 residents in Mechanicsburg, Pennsylvania (Cumberland County) through 41,820 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 24 total violations for this system , of which 3 (13%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 17 monitoring and reporting violations are on file. The most recent violation on record dates to 2022.
The most frequently cited contaminant at this system is Interim Enhanced Surface Water Treatment Rule, recorded in 4 violations (MR). Under EPA's UCMR5 PFAS monitoring program, 4 PFAS compounds were detected in samples collected from this system, with a maximum reported concentration of 10.4 ppt (parts per trillion). PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.
Across Pennsylvania, EPA tracks 7,701 public water systems serving 12,630,061 people, with 1,159,868 cumulative violations and 68,517 health-based violations on record. About 97% of systems in the state carry at least one violation, and state-wide the average per system is 150.6 violations. Statewide, 224 of 389 UCMR5-tested systems have reported PFAS detections (57.6%).
PA American Water Co West's 24 violations sit below the Pennsylvania average.
All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.
4 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
System Details
- System Type
- Community
- Owner Type
- Public/Private
- Connections
- 41,820
- County
- Cumberland
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 17
- Treatment Tech Violations
- 3
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Interim Enhanced Surface Water Treatment Rule | MR | 4 | 2019 |
| Total Haloacetic Acids (HAA5) | MR | 4 | 2022 |
| TTHM | MR | 4 | 2022 |
| Surface Water Treatment Rule | TT | 3 | 1993 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule | MR | 2 | 2009 |
| CARBON, TOTAL | MR | 2 | 2016 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1976 |
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 6 of 232 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| 4:2 FTS | 7/1/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NEtFOSAA | 7/1/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFTrDA | 7/1/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFTA | 7/1/2024 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFHpS | 7/1/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeS | 7/1/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| NFDHA | 7/1/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFEESA | 7/1/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 7/1/2024 | 3.40 ppt | 3.00 ppt | Detected |
| PFMPA | 7/1/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| 6:2 FTS | 7/1/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 7/1/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 7/1/2024 | <6.00 ppt | 6.00 ppt | Not Detected |
| ADONA | 7/1/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 7/1/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFNA | 7/1/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxS | 7/1/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 7/1/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 7/1/2024 | 3.20 ppt | 3.00 ppt | Detected |
| 9Cl-PF3ONS | 7/1/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 7/1/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFUnA | 7/1/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFHxA | 7/1/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 7/1/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 7/1/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 7/1/2024 | 4.90 ppt | 4.00 ppt | Detected |
| PFOS | 7/1/2024 | 10.40 ppt | 4.00 ppt | Detected |
| HFPO-DA | 7/1/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 8:2 FTS | 7/1/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| NFDHA | 7/1/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFPeS | 7/1/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxS | 7/1/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTA | 7/1/2024 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFTrDA | 7/1/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| NEtFOSAA | 7/1/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 7/1/2024 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFDoA | 7/1/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 7/1/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 7/1/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFUnA | 7/1/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 7/1/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 9Cl-PF3ONS | 7/1/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| ADONA | 7/1/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 7/1/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHpS | 7/1/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 7/1/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 7/1/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBA | 7/1/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFOA | 7/1/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 7/1/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
Verify This Water System
The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for PA American Water Co West.
EPA SDWIS, Federal Reports
EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:
View PWS ID PA7210029 on SDWISSource: EPA SDWIS Federal Reports Search
Pennsylvania Drinking Water Authority
Pennsylvania DEP, Bureau of Safe Drinking Water is the primacy agency that licenses and inspects PA American Water Co West under EPA-delegated authority.
Open PA regulator portalViolation Timeline
Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.
| Year (latest) | Contaminant | Category | Count | EPA Record |
|---|---|---|---|---|
| 2022 | Total Haloacetic Acids (HAA5) | MR | 4 | SDWIS / PA7210029 / 2456 |
| 2022 | TTHM | MR | 4 | SDWIS / PA7210029 / 2950 |
| 2019 | Interim Enhanced Surface Water Treatment Rule | MR | 4 | SDWIS / PA7210029 / 0300 |
| 2016 | CARBON, TOTAL | MR | 2 | SDWIS / PA7210029 / 2920 |
| 2009 | Stage 2 Disinfectants and Disinfection Byproducts Rule | MR | 2 | SDWIS / PA7210029 / 0600 |
| 1993 | Surface Water Treatment Rule | TT | 3 | SDWIS / PA7210029 / 0200 |
| 1976 | Gross Alpha, Excl. Radon and U | MR | 1 | SDWIS / PA7210029 / 4000 |
How PA American Water Co West Compares
Cross-reference this system's record against state averages and the federal MCL framework for context.
| Metric | PA American Water Co West | Pennsylvania avg | Federal benchmark |
|---|---|---|---|
| Total violations | 24 | 150.6 | SDWA compliance, any non-zero count is a recorded breach |
| Health-based violations | 3 | 8.9 | Indicates a contaminant exceeded a federal MCL |
| PFAS detection | 4 compounds | 57.6% | EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt |
| Population served | 105,127 | 1,640 | Sizing context for compliance burden |
Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 7,701 regulated public water systems in Pennsylvania.
Federal MCL reference, Safe Drinking Water Act thresholds ▼
| Contaminant | Federal MCL / Action Level | Note |
|---|---|---|
| Lead | 0 mg/L (Action Level: 0.015 mg/L) | Lead and Copper Rule treatment technique |
| Arsenic | 0.010 mg/L (10 ppb) | Health-based MCL since 2006 |
| Total Coliform | Treatment technique (RTCR) | Indicator organism, monitoring trigger |
| PFOA / PFOS (PFAS) | 4.0 ppt each (final 2024 rule) | Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026) |
| Nitrate (as N) | 10 mg/L | Acute health risk for infants |
Frequently Asked Questions
Is PA American Water Co West water safe to drink? ▼
How many people does PA American Water Co West serve? ▼
What type of violations does PA American Water Co West have? ▼
Has PFAS been detected in PA American Water Co West water? ▼
What water source does PA American Water Co West use? ▼
Where does this data come from? ▼
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.