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CITY OF LOCK HAVEN WATER DEPT

PWS ID: PA4180048 · LOCK HAVEN, Pennsylvania 17745

CITY OF LOCK HAVEN WATER DEPT serves 10,000 people in LOCK HAVEN, Pennsylvania using Surface Water water sources. It has 121 recorded EPA violations, including 12 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: CITY OF LOCK HAVEN WATER DEPT

CITY OF LOCK HAVEN WATER DEPT is a local-owned community water system that delivers drinking water to 10,000 residents in LOCK HAVEN, Pennsylvania (Clinton County) through 3,200 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 121 total violations for this system , of which 12 (10%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 83 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 Total Haloacetic Acids (HAA5), recorded in 19 violations (MR). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

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. CITY OF LOCK HAVEN WATER DEPT's 121 violations sit below 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.

Population Served
10,000
Total Violations
121
Health-Based Violations
12
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
3,200
County
Clinton
School/Daycare
No
MCL Violations
1
Monitoring Violations
83
Treatment Tech Violations
11

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Total Haloacetic Acids (HAA5) MR 19 2025
TTHM MR 18 2025
Public Notice Other 10 2024
Chlorine MR 10 2024
Surface Water Treatment Rule MR 8 2024
Lead and Copper Rule MR 8 2025
Surface Water Treatment Rule TT 7 2007
Consumer Confidence Rule Other 6 2005
Nitrate MR 5 1993
Revised Total Coliform Rule TT 4 2016
Asbestos MR 4 2022
Revised Total Coliform Rule RPT 2 2024
Stage 2 Disinfectants and Disinfection Byproducts Rule MR 2 2007
Coliform (TCR) MR 1 2011
Arsenic MR 1 1984
Chromium MR 1 1984
Endrin MR 1 1982
Selenium MR 1 1984
Barium MR 1 1984
Mercury MR 1 1984
Coliform (TCR) MCL 1 2014
Fluoride MR 1 1984
Cadmium MR 1 1984

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 120 samples detected PFAS.

Contaminant Date Result MRL Status
PFHpS 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 7/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 7/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 7/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 7/9/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
lithium 7/9/2024 <9 µg/L 9 µg/L Not Detected
PFPeS 7/9/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFEESA 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
ADONA 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 7/9/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFTrDA 7/9/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFBA 7/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
NEtFOSAA 7/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 7/9/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFTA 7/9/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFBS 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOS 7/9/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 7/9/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 7/9/2024 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 7/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFNA 7/9/2024 <0.004 µg/L 0.004 µg/L Not Detected
NMeFOSAA 7/9/2024 <0.006 µg/L 0.006 µg/L Not Detected
PFHpS 4/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 4/16/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 4/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 4/16/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 4/16/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 4/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 4/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 4/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 4/16/2024 <0.004 µg/L 0.004 µg/L Not Detected
lithium 4/16/2024 <9 µg/L 9 µg/L Not Detected
HFPO-DA 4/16/2024 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 4/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 4/16/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFTA 4/16/2024 <0.008 µg/L 0.008 µg/L Not Detected
6:2 FTS 4/16/2024 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 4/16/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFBS 4/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFTrDA 4/16/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFHpA 4/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 4/16/2024 <0.003 µg/L 0.003 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 CITY OF LOCK HAVEN WATER DEPT.

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 PA4180048 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 CITY OF LOCK HAVEN WATER DEPT 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 Total Haloacetic Acids (HAA5) MR 19 SDWIS / PA4180048 / 2456
2025 TTHM MR 18 SDWIS / PA4180048 / 2950
2025 Lead and Copper Rule MR 8 SDWIS / PA4180048 / 5000
2024 Public Notice Other 10 SDWIS / PA4180048 / 7500
2024 Chlorine MR 10 SDWIS / PA4180048 / 0999
2024 Surface Water Treatment Rule MR 8 SDWIS / PA4180048 / 0200
2024 Revised Total Coliform Rule RPT 2 SDWIS / PA4180048 / 8000
2022 Asbestos MR 4 SDWIS / PA4180048 / 1094
2016 Revised Total Coliform Rule TT 4 SDWIS / PA4180048 / 8000
2014 Coliform (TCR) MCL 1 SDWIS / PA4180048 / 3100
2011 Coliform (TCR) MR 1 SDWIS / PA4180048 / 3100
2007 Surface Water Treatment Rule TT 7 SDWIS / PA4180048 / 0200
2007 Stage 2 Disinfectants and Disinfection Byproducts Rule MR 2 SDWIS / PA4180048 / 0600
2005 Consumer Confidence Rule Other 6 SDWIS / PA4180048 / 7000
1993 Nitrate MR 5 SDWIS / PA4180048 / 1040

How CITY OF LOCK HAVEN WATER DEPT Compares

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

Metric CITY OF LOCK HAVEN WATER DEPT Pennsylvania avg Federal benchmark
Total violations 121 150.6 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 12 8.9 Indicates a contaminant exceeded a federal MCL
PFAS detection None 57.6% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 10,000 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 CITY OF LOCK HAVEN WATER DEPT water safe to drink? ▼
CITY OF LOCK HAVEN WATER DEPT (PWS ID: PA4180048) has 121 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 10,000 people using Surface Water sources.
How many people does CITY OF LOCK HAVEN WATER DEPT serve? ▼
CITY OF LOCK HAVEN WATER DEPT serves 10,000 people in LOCK HAVEN, Pennsylvania. It is a Local-owned system using Surface Water water sources with 3,200 service connections.
What type of violations does CITY OF LOCK HAVEN WATER DEPT have? ▼
CITY OF LOCK HAVEN WATER DEPT has 121 total violations: 12 health-based violations (MCL exceedances or treatment failures), 83 monitoring/reporting violations, and 11 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in CITY OF LOCK HAVEN WATER DEPT water? ▼
No. CITY OF LOCK HAVEN WATER DEPT was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does CITY OF LOCK HAVEN WATER DEPT use? ▼
CITY OF LOCK HAVEN WATER DEPT 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.

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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.

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