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Non-Transient Non-Community Water System · PWS ME0108180

Dayton School Department

Biddeford, Maine 04005 - drinking water served from groundwater sources to 142 people, tracked in EPA SDWIS and UCMR5.

142
People served
169
EPA violations
4
Health-based
Untested
UCMR5 result

The verdict

EPA records 169 drinking-water violations at Dayton School Department, 2% of them health-based - above the Maine per-system average.

169
Total EPA violations on record
2%
Health-based (MCL / treatment failure)
142
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Dayton School Department

Dayton School Department is a local-owned non-transient non-community water system that delivers drinking water to 142 residents in Biddeford, Maine (York County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 169 total violations for this system , of which 4 (2%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 162 monitoring and reporting violations are on file. The most recent violation on record dates to 2021.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 32 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Maine, EPA tracks 1,864 public water systems serving 936,624 people, with 148,796 cumulative violations and 23,741 health-based violations on record. About 94% of systems in the state carry at least one violation, and state-wide the average per system is 79.8 violations. Statewide, 14 of 41 UCMR5-tested systems have reported PFAS detections (34.1%).

Dayton School Department's 169 violations sit above the Maine 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
142
Total Violations
169
Health-Based Violations
4
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Local
Connections
1
County
York
School/Daycare
Yes
MCL Violations
4
Monitoring Violations
162
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 32 2013
Lead and Copper Rule MR 10 2021
Cadmium MR 4 2002
Chromium MR 4 2002
Mercury MR 4 2002
Selenium MR 4 2002
Xylenes, Total MR 4 2008
DICHLOROMETHANE MR 4 2008
o-Dichlorobenzene MR 4 2008
Vinyl chloride MR 4 2008
1,1-Dichloroethylene MR 4 2008
trans-1,2-Dichloroethylene MR 4 2008
1,2-Dichloroethane MR 4 2008
1,1,1-Trichloroethane MR 4 2008
1,1,2-Trichloroethane MR 4 2008
CHLOROBENZENE MR 4 2008
Benzene MR 4 2008
Ethylbenzene MR 4 2008
Styrene MR 4 2008
Nitrate MR 4 2003
cis-1,2-Dichloroethylene MR 4 2008
Nitrite MR 4 2003
Carbon tetrachloride MR 4 2008
Tetrachloroethylene MR 4 2008
Barium MR 4 2002
1,2-Dichloropropane MR 4 2008
Fluoride MR 4 2002
1,2,4-Trichlorobenzene MR 4 2008
Toluene MR 4 2008
Coliform (TCR) MCL 4 2001

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 Dayton School Department.

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 ME0108180 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Maine Drinking Water Authority

Maine's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find ME regulator via EPA SDWIS

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
2021 Lead and Copper Rule MR 10 SDWIS / ME0108180 / 5000
2013 Coliform (TCR) MR 32 SDWIS / ME0108180 / 3100
2012 Public Notice Other 3 SDWIS / ME0108180 / 7500
2008 Xylenes, Total MR 4 SDWIS / ME0108180 / 2955
2008 DICHLOROMETHANE MR 4 SDWIS / ME0108180 / 2964
2008 o-Dichlorobenzene MR 4 SDWIS / ME0108180 / 2968
2008 Vinyl chloride MR 4 SDWIS / ME0108180 / 2976
2008 1,1-Dichloroethylene MR 4 SDWIS / ME0108180 / 2977
2008 trans-1,2-Dichloroethylene MR 4 SDWIS / ME0108180 / 2979
2008 1,2-Dichloroethane MR 4 SDWIS / ME0108180 / 2980
2008 1,1,1-Trichloroethane MR 4 SDWIS / ME0108180 / 2981
2008 1,1,2-Trichloroethane MR 4 SDWIS / ME0108180 / 2985
2008 CHLOROBENZENE MR 4 SDWIS / ME0108180 / 2989
2008 Benzene MR 4 SDWIS / ME0108180 / 2990
2008 Ethylbenzene MR 4 SDWIS / ME0108180 / 2992

How Dayton School Department Compares

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

Metric Dayton School Department Maine avg Federal benchmark
Total violations 169 79.8 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 4 12.7 Indicates a contaminant exceeded a federal MCL
PFAS detection None 34.1% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 142 502 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,864 regulated public water systems in Maine.

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 Dayton School Department water safe to drink? ▼
Dayton School Department (PWS ID: ME0108180) has 169 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 142 people using Groundwater sources.
How many people does Dayton School Department serve? ▼
Dayton School Department serves 142 people in Biddeford, Maine. It is a Local-owned system using Groundwater water sources with 1 service connections.
What type of violations does Dayton School Department have? ▼
Dayton School Department has 169 total violations: 4 health-based violations (MCL exceedances or treatment failures), 162 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Dayton School Department water? ▼
No PFAS testing data is available for Dayton School Department under the EPA's UCMR5 monitoring program.
What water source does Dayton School Department use? ▼
Dayton School Department uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.
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.