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DELHI WATER SUPPLY

PWS ID: IA2817020 · DELHI, Iowa 52223

DELHI WATER SUPPLY serves 420 people in DELHI, Iowa using Groundwater water sources. It has 328 recorded EPA violations, including 0 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: DELHI WATER SUPPLY

DELHI WATER SUPPLY is a local-owned community water system that delivers drinking water to 420 residents in DELHI, Iowa (Delaware County) through 270 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 328 total violations for this system , of which 0 (0%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 322 monitoring and reporting violations are on file. The most recent violation on record dates to 2022.

The most frequently cited contaminant at this system is Nitrate, recorded in 25 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 Iowa, EPA tracks 1,795 public water systems serving 3,114,444 people, with 138,271 cumulative violations and 27,946 health-based violations on record. About 95% of systems in the state carry at least one violation, and state-wide the average per system is 77 violations. DELHI WATER SUPPLY's 328 violations sit above the Iowa average. Statewide, 127 of 152 UCMR5-tested systems have reported PFAS detections (83.6%). 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
420
Total Violations
328
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
270
County
Delaware
School/Daycare
No
MCL Violations
0
Monitoring Violations
322
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Nitrate MR 25 2022
Xylenes, Total MR 20 2007
Ethylbenzene MR 17 2007
Benzene MR 8 2007
Carbon tetrachloride MR 8 2007
o-Dichlorobenzene MR 8 2007
p-Dichlorobenzene MR 8 2007
1,2-Dichloroethane MR 8 2007
DICHLOROMETHANE MR 8 2007
Styrene MR 8 2007
Tetrachloroethylene MR 8 2007
1,1,1-Trichloroethane MR 8 2007
Vinyl chloride MR 8 2007
Benzo(a)pyrene MR 8 2007
2,4-D MR 8 2007
Pentachlorophenol MR 8 2007
Simazine MR 8 2007
2,4,5-TP MR 8 2007
LASSO MR 8 2007
Di(2-ethylhexyl) adipate MR 8 2007
Dinoseb MR 8 2007
cis-1,2-Dichloroethylene MR 8 2007
CHLOROBENZENE MR 8 2007
Di(2-ethylhexyl) phthalate MR 8 2007
1,1-Dichloroethylene MR 8 2007
1,1,2-Trichloroethane MR 8 2007
Atrazine MR 8 2007
trans-1,2-Dichloroethylene MR 8 2007
Toluene MR 8 2007
1,2,4-Trichlorobenzene MR 8 2007

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 DELHI WATER SUPPLY.

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 IA2817020 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Iowa Drinking Water Authority

Iowa'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 IA 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
2022 Nitrate MR 25 SDWIS / IA2817020 / 1040
2021 Revised Total Coliform Rule MON 4 SDWIS / IA2817020 / 8000
2016 Coliform (TCR) MR 8 SDWIS / IA2817020 / 3100
2011 Consumer Confidence Rule Other 3 SDWIS / IA2817020 / 7000
2007 Xylenes, Total MR 20 SDWIS / IA2817020 / 2955
2007 Ethylbenzene MR 17 SDWIS / IA2817020 / 2992
2007 Benzene MR 8 SDWIS / IA2817020 / 2990
2007 Carbon tetrachloride MR 8 SDWIS / IA2817020 / 2982
2007 o-Dichlorobenzene MR 8 SDWIS / IA2817020 / 2968
2007 p-Dichlorobenzene MR 8 SDWIS / IA2817020 / 2969
2007 1,2-Dichloroethane MR 8 SDWIS / IA2817020 / 2980
2007 DICHLOROMETHANE MR 8 SDWIS / IA2817020 / 2964
2007 Styrene MR 8 SDWIS / IA2817020 / 2996
2007 Tetrachloroethylene MR 8 SDWIS / IA2817020 / 2987
2007 1,1,1-Trichloroethane MR 8 SDWIS / IA2817020 / 2981

How DELHI WATER SUPPLY Compares

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

Metric DELHI WATER SUPPLY Iowa avg Federal benchmark
Total violations 328 77 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 0 15.6 Indicates a contaminant exceeded a federal MCL
PFAS detection None 83.6% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 420 1,735 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,795 regulated public water systems in Iowa.

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 DELHI WATER SUPPLY water safe to drink? ▼
DELHI WATER SUPPLY (PWS ID: IA2817020) has 328 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 420 people using Groundwater sources.
How many people does DELHI WATER SUPPLY serve? ▼
DELHI WATER SUPPLY serves 420 people in DELHI, Iowa. It is a Local-owned system using Groundwater water sources with 270 service connections.
What type of violations does DELHI WATER SUPPLY have? ▼
DELHI WATER SUPPLY has 328 total violations: 0 health-based violations (MCL exceedances or treatment failures), 322 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in DELHI WATER SUPPLY water? ▼
No PFAS testing data is available for DELHI WATER SUPPLY under the EPA's UCMR5 monitoring program.
What water source does DELHI WATER SUPPLY use? ▼
DELHI WATER SUPPLY 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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