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Community Water System · PWS PA4410179

Collomsville Mutual Waterworks

Williamsport, Pennsylvania 17702 - drinking water served from groundwater sources to 250 people, tracked in EPA SDWIS and UCMR5.

250
People served
917
EPA violations
7
Health-based
Untested
UCMR5 result

The verdict

EPA records 917 drinking-water violations at Collomsville Mutual Waterworks, 1% of them health-based - above the Pennsylvania per-system average.

917
Total EPA violations on record
1%
Health-based (MCL / treatment failure)
250
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Collomsville Mutual Waterworks

Collomsville Mutual Waterworks is a private-owned community water system that delivers drinking water to 250 residents in Williamsport, Pennsylvania (Lycoming County) through 87 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 917 total violations for this system , of which 7 (1%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 710 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Public Notice, recorded in 132 violations (Other). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

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%).

Collomsville Mutual Waterworks's 917 violations sit above 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.

Population Served
250
Total Violations
917
Health-Based Violations
7
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
87
County
Lycoming
School/Daycare
No
MCL Violations
4
Monitoring Violations
710
Treatment Tech Violations
3

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Public Notice Other 132 2024
Consumer Confidence Rule Other 35 2024
Chlorine MR 33 2018
Nitrate MR 27 2024
Nitrite MR 17 2024
Heptachlor epoxide MR 17 2021
2,3,7,8-TCDD MR 15 2021
Endrin MR 14 2021
BHC-GAMMA MR 14 2021
Hexachlorocyclopentadiene MR 14 2021
2,4-D MR 14 2021
HEXACHLOROBENZENE MR 14 2021
Chlordane MR 14 2021
Toxaphene MR 14 2021
Methoxychlor MR 14 2021
Heptachlor MR 14 2021
Carbofuran MR 13 2021
Total Polychlorinated Biphenyls (PCB) MR 13 2021
Dalapon MR 11 2021
Glyphosate MR 11 2021
OXAMYL MR 11 2021
Simazine MR 11 2021
Dinoseb MR 11 2021
Atrazine MR 11 2021
Benzo(a)pyrene MR 11 2021
Pentachlorophenol MR 11 2021
1,2-DIBROMO-3-CHLOROPROPANE MR 11 2021
Endothall MR 11 2021
ETHYLENE DIBROMIDE MR 11 2021
Arsenic MR 11 2021

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 Collomsville Mutual Waterworks.

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 PA4410179 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 Collomsville Mutual Waterworks 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
2024 Public Notice Other 132 SDWIS / PA4410179 / 7500
2024 Consumer Confidence Rule Other 35 SDWIS / PA4410179 / 7000
2024 Nitrate MR 27 SDWIS / PA4410179 / 1040
2024 Nitrite MR 17 SDWIS / PA4410179 / 1041
2023 Revised Total Coliform Rule MON 3 SDWIS / PA4410179 / 8000
2022 Lead and Copper Rule MR 8 SDWIS / PA4410179 / 5000
2022 Groundwater Rule MR 8 SDWIS / PA4410179 / 0700
2021 Heptachlor epoxide MR 17 SDWIS / PA4410179 / 2067
2021 2,3,7,8-TCDD MR 15 SDWIS / PA4410179 / 2063
2021 Endrin MR 14 SDWIS / PA4410179 / 2005
2021 BHC-GAMMA MR 14 SDWIS / PA4410179 / 2010
2021 Hexachlorocyclopentadiene MR 14 SDWIS / PA4410179 / 2042
2021 2,4-D MR 14 SDWIS / PA4410179 / 2105
2021 HEXACHLOROBENZENE MR 14 SDWIS / PA4410179 / 2274
2021 Chlordane MR 14 SDWIS / PA4410179 / 2959

How Collomsville Mutual Waterworks Compares

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

Metric Collomsville Mutual Waterworks Pennsylvania avg Federal benchmark
Total violations 917 150.6 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 7 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 250 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 Collomsville Mutual Waterworks water safe to drink? ▼
Collomsville Mutual Waterworks (PWS ID: PA4410179) has 917 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 250 people using Groundwater sources.
How many people does Collomsville Mutual Waterworks serve? ▼
Collomsville Mutual Waterworks serves 250 people in Williamsport, Pennsylvania. It is a Private-owned system using Groundwater water sources with 87 service connections.
What type of violations does Collomsville Mutual Waterworks have? ▼
Collomsville Mutual Waterworks has 917 total violations: 7 health-based violations (MCL exceedances or treatment failures), 710 monitoring/reporting violations, and 3 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Collomsville Mutual Waterworks water? ▼
No PFAS testing data is available for Collomsville Mutual Waterworks under the EPA's UCMR5 monitoring program.
What water source does Collomsville Mutual Waterworks use? ▼
Collomsville Mutual Waterworks uses Groundwater 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.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

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

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

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.