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DECKER WATER WORKS

PWS ID: IN5242004 · DECKER, Indiana 47524

DECKER WATER WORKS serves 273 people in DECKER, Indiana using Groundwater water sources. It has 183 recorded EPA violations, including 7 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: DECKER WATER WORKS

DECKER WATER WORKS is a local-owned community water system that delivers drinking water to 273 residents in DECKER, Indiana (Knox County) through 109 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 183 total violations for this system , of which 7 (4%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 147 monitoring and reporting violations are on file. The most recent violation on record dates to 2023.

The most frequently cited contaminant at this system is Consumer Confidence Rule, recorded in 17 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 Indiana, EPA tracks 3,967 public water systems serving 5,774,616 people, with 352,710 cumulative violations and 35,932 health-based violations on record. About 96% of systems in the state carry at least one violation, and state-wide the average per system is 88.9 violations. DECKER WATER WORKS's 183 violations sit above the Indiana average. Statewide, 93 of 229 UCMR5-tested systems have reported PFAS detections (40.6%). 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
273
Total Violations
183
Health-Based Violations
7
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
109
County
Knox
School/Daycare
No
MCL Violations
7
Monitoring Violations
147
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Consumer Confidence Rule Other 17 2020
Coliform (TCR) MR 11 2006
Coliform (TCR) MCL 7 2006
TTHM MR 6 2023
Total Haloacetic Acids (HAA5) MR 6 2023
Endrin MR 4 2009
Methoxychlor MR 4 2009
Toxaphene MR 4 2009
Dalapon MR 4 2009
Endothall MR 4 2009
Glyphosate MR 4 2009
Di(2-ethylhexyl) adipate MR 4 2009
OXAMYL MR 4 2009
Di(2-ethylhexyl) phthalate MR 4 2009
Picloram MR 4 2009
Dinoseb MR 4 2009
Hexachlorocyclopentadiene MR 4 2009
Carbofuran MR 4 2009
Atrazine MR 4 2009
LASSO MR 4 2009
2,4-D MR 4 2009
2,4,5-TP MR 4 2009
HEXACHLOROBENZENE MR 4 2009
Benzo(a)pyrene MR 4 2009
1,2-DIBROMO-3-CHLOROPROPANE MR 4 2009
ETHYLENE DIBROMIDE MR 4 2009
Chlordane MR 4 2009
Nitrate MR 4 2010
Heptachlor MR 4 2009
Simazine MR 4 2009

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 DECKER WATER WORKS.

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 IN5242004 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Indiana Drinking Water Authority

Indiana Department of Environmental Management — Drinking Water Branch is the primacy agency that licenses and inspects DECKER WATER WORKS under EPA-delegated authority.

Open IN regulator portal

Source: Indiana Department of Environmental Management — Drinking Water Branch

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
2023 TTHM MR 6 SDWIS / IN5242004 / 2950
2023 Total Haloacetic Acids (HAA5) MR 6 SDWIS / IN5242004 / 2456
2021 Lead and Copper Rule MR 3 SDWIS / IN5242004 / 5000
2020 Consumer Confidence Rule Other 17 SDWIS / IN5242004 / 7000
2019 E. COLI MR 3 SDWIS / IN5242004 / 3014
2010 Nitrate MR 4 SDWIS / IN5242004 / 1040
2009 Endrin MR 4 SDWIS / IN5242004 / 2005
2009 Methoxychlor MR 4 SDWIS / IN5242004 / 2015
2009 Toxaphene MR 4 SDWIS / IN5242004 / 2020
2009 Dalapon MR 4 SDWIS / IN5242004 / 2031
2009 Endothall MR 4 SDWIS / IN5242004 / 2033
2009 Glyphosate MR 4 SDWIS / IN5242004 / 2034
2009 Di(2-ethylhexyl) adipate MR 4 SDWIS / IN5242004 / 2035
2009 OXAMYL MR 4 SDWIS / IN5242004 / 2036
2009 Di(2-ethylhexyl) phthalate MR 4 SDWIS / IN5242004 / 2039

How DECKER WATER WORKS Compares

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

Metric DECKER WATER WORKS Indiana avg Federal benchmark
Total violations 183 88.9 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 7 9.1 Indicates a contaminant exceeded a federal MCL
PFAS detection None 40.6% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 273 1,456 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 3,967 regulated public water systems in Indiana.

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 DECKER WATER WORKS water safe to drink? ▼
DECKER WATER WORKS (PWS ID: IN5242004) has 183 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 273 people using Groundwater sources.
How many people does DECKER WATER WORKS serve? ▼
DECKER WATER WORKS serves 273 people in DECKER, Indiana. It is a Local-owned system using Groundwater water sources with 109 service connections.
What type of violations does DECKER WATER WORKS have? ▼
DECKER WATER WORKS has 183 total violations: 7 health-based violations (MCL exceedances or treatment failures), 147 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in DECKER WATER WORKS water? ▼
No PFAS testing data is available for DECKER WATER WORKS under the EPA's UCMR5 monitoring program.
What water source does DECKER WATER WORKS use? ▼
DECKER WATER WORKS 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.

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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.

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