PlainWater
States → Pennsylvania

MOUNTAIN WATER ASSN

PWS ID: PA5260032 · FAIRCHANCE, Pennsylvania 15436

MOUNTAIN WATER ASSN serves 3,856 people in FAIRCHANCE, Pennsylvania using Surface Water water sources. It has 275 recorded EPA violations, including 8 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (1 compound found).

Water Quality Snapshot: MOUNTAIN WATER ASSN

MOUNTAIN WATER ASSN is a private-owned community water system that delivers drinking water to 3,856 residents in FAIRCHANCE, Pennsylvania (Fayette County) through 1,600 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 275 total violations for this system , of which 8 (3%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 242 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Surface Water Treatment Rule, recorded in 18 violations (MR). Under EPA's UCMR5 PFAS monitoring program, 1 PFAS compound was detected in samples collected from this system, with a maximum reported concentration of 10.5 ppt. 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. MOUNTAIN WATER ASSN's 275 violations sit above the Pennsylvania average. Statewide, 224 of 389 UCMR5-tested systems have reported PFAS detections (57.6%). All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

PFAS Detected

1 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
3,856
Total Violations
275
Health-Based Violations
8
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Private
Connections
1,600
County
Fayette
School/Daycare
No
MCL Violations
6
Monitoring Violations
242
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Surface Water Treatment Rule MR 18 2019
Groundwater Rule MR 12 2025
Consumer Confidence Rule Other 11 2024
Total Haloacetic Acids (HAA5) MR 11 2024
TTHM MR 9 2024
1,2,4-Trichlorobenzene MR 8 2019
Xylenes, Total MR 8 2019
DICHLOROMETHANE MR 8 2019
o-Dichlorobenzene MR 8 2019
p-Dichlorobenzene MR 8 2019
1,1-Dichloroethylene MR 8 2019
1,2-Dichloroethane MR 8 2019
Carbon tetrachloride MR 8 2019
Tetrachloroethylene MR 8 2019
CHLOROBENZENE MR 8 2019
Benzene MR 8 2019
Toluene MR 8 2019
Styrene MR 8 2019
cis-1,2-Dichloroethylene MR 8 2019
1,2-Dichloropropane MR 8 2019
Trichloroethylene MR 8 2019
1,1,2-Trichloroethane MR 8 2019
Revised Total Coliform Rule RPT 8 2021
1,1,1-Trichloroethane MR 8 2019
Ethylbenzene MR 8 2019
trans-1,2-Dichloroethylene MR 8 2019
Chlorine MR 7 2019
Public Notice Other 5 2021
Revised Total Coliform Rule MCL 4 2021
Coliform (TCR) MR 4 1995

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 2 of 240 samples detected PFAS.

Contaminant Date Result MRL Status
9Cl-PF3ONS 9/25/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFOS 9/25/2023 <0.004 µg/L 0.004 µg/L Not Detected
11Cl-PF3OUdS 9/25/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 9/25/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFHxA 9/25/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 9/25/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 9/25/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 9/25/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 9/25/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 9/25/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 9/25/2023 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 9/25/2023 <0.007 µg/L 0.007 µg/L Not Detected
NMeFOSAA 9/25/2023 <0.006 µg/L 0.006 µg/L Not Detected
PFHpA 9/25/2023 <0.003 µg/L 0.003 µg/L Not Detected
lithium 9/25/2023 <9 µg/L 9 µg/L Not Detected
ADONA 9/25/2023 <0.003 µg/L 0.003 µg/L Not Detected
NEtFOSAA 9/25/2023 <0.005 µg/L 0.005 µg/L Not Detected
NFDHA 9/25/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFBS 9/25/2023 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 9/25/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFPeS 9/25/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFEESA 9/25/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 9/25/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 9/25/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 9/25/2023 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 9/25/2023 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 9/25/2023 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 9/25/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 9/25/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFHpS 9/25/2023 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 9/25/2023 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 9/25/2023 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 9/25/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFHpS 9/25/2023 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 9/25/2023 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 9/25/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 9/25/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 9/25/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 9/25/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 9/25/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 9/25/2023 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 9/25/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFPeS 9/25/2023 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 9/25/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFNA 9/25/2023 <0.004 µg/L 0.004 µg/L Not Detected
NMeFOSAA 9/25/2023 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 9/25/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 9/25/2023 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 9/25/2023 <0.008 µg/L 0.008 µg/L Not Detected
lithium 9/25/2023 <9 µg/L 9 µg/L 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 MOUNTAIN WATER ASSN.

Federal Source of Truth

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 PA5260032 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Pennsylvania Drinking Water Authority

Pennsylvania DEP — Bureau of Safe Drinking Water is the primacy agency that licenses and inspects MOUNTAIN WATER ASSN under EPA-delegated authority.

Open PA regulator portal

Source: Pennsylvania DEP — Bureau of Safe Drinking Water

Violation 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
2025 Groundwater Rule MR 12 SDWIS / PA5260032 / 0700
2024 Consumer Confidence Rule Other 11 SDWIS / PA5260032 / 7000
2024 Total Haloacetic Acids (HAA5) MR 11 SDWIS / PA5260032 / 2456
2024 TTHM MR 9 SDWIS / PA5260032 / 2950
2023 Dinoseb MR 3 SDWIS / PA5260032 / 2041
2023 2,4-D MR 3 SDWIS / PA5260032 / 2105
2023 2,4,5-TP MR 3 SDWIS / PA5260032 / 2110
2023 Pentachlorophenol MR 3 SDWIS / PA5260032 / 2326
2022 Asbestos MR 3 SDWIS / PA5260032 / 1094
2021 Revised Total Coliform Rule RPT 8 SDWIS / PA5260032 / 8000
2021 Public Notice Other 5 SDWIS / PA5260032 / 7500
2021 Revised Total Coliform Rule MCL 4 SDWIS / PA5260032 / 8000
2021 Revised Total Coliform Rule TT 2 SDWIS / PA5260032 / 8000
2019 Surface Water Treatment Rule MR 18 SDWIS / PA5260032 / 0200
2019 1,2,4-Trichlorobenzene MR 8 SDWIS / PA5260032 / 2378

How MOUNTAIN WATER ASSN Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric MOUNTAIN WATER ASSN Pennsylvania avg Federal benchmark
Total violations 275 150.6 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 8 8.9 Indicates a contaminant exceeded a federal MCL
PFAS detection 1 compound 57.6% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 3,856 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
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is MOUNTAIN WATER ASSN water safe to drink? ▼
MOUNTAIN WATER ASSN (PWS ID: PA5260032) has 275 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 1 PFAS compound found. This system serves 3,856 people using Surface Water sources.
How many people does MOUNTAIN WATER ASSN serve? ▼
MOUNTAIN WATER ASSN serves 3,856 people in FAIRCHANCE, Pennsylvania. It is a Private-owned system using Surface Water water sources with 1,600 service connections.
What type of violations does MOUNTAIN WATER ASSN have? ▼
MOUNTAIN WATER ASSN has 275 total violations: 8 health-based violations (MCL exceedances or treatment failures), 242 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in MOUNTAIN WATER ASSN water? ▼
Yes. UCMR5 testing detected 1 PFAS compound in MOUNTAIN WATER ASSN's water supply: lithium. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does MOUNTAIN WATER ASSN use? ▼
MOUNTAIN WATER ASSN uses Surface Water as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

Explore PlainWater

Water in Pennsylvania

All systems in state
All States

Water quality by state
Contaminants

PFAS & other pollutants
Guides

Understanding water quality

Related Data for Pennsylvania

Environmental Data → Natural Hazards → Air Quality → Healthcare Access → Climate Data →
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.

Read our methodology — how this data is sourced, computed, and verified.

Related

Browse all → | Rankings →
Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by Kiznis Studio Editorial