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Community Water System · PWS IA8531083

Gilbert Water Supply

Gilbert, Iowa 50105 - drinking water served from groundwater sources to 1,211 people, tracked in EPA SDWIS and UCMR5.

1,211
People served
164
EPA violations
5
Health-based
Untested
UCMR5 result

The verdict

EPA records 164 drinking-water violations at Gilbert Water Supply, 3% of them health-based - above the Iowa per-system average.

164
Total EPA violations on record
3%
Health-based (MCL / treatment failure)
1,211
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Gilbert Water Supply

Gilbert Water Supply is a local-owned community water system that delivers drinking water to 1,211 residents in Gilbert, Iowa (Story County) through 483 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 164 total violations for this system , of which 5 (3%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 155 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 Nitrite, recorded in 7 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. Statewide, 127 of 152 UCMR5-tested systems have reported PFAS detections (83.6%).

Gilbert Water Supply's 164 violations sit above the Iowa 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
1,211
Total Violations
164
Health-Based Violations
5
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
483
County
Story
School/Daycare
No
MCL Violations
5
Monitoring Violations
155
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Nitrite MR 7 2005
TTHM MR 6 2021
Total Haloacetic Acids (HAA5) MR 6 2021
Lead and Copper Rule MR 5 2008
Coliform (TCR) MCL 5 2015
Arsenic MR 5 2008
Carbon tetrachloride MR 4 2018
o-Dichlorobenzene MR 4 2018
p-Dichlorobenzene MR 4 2018
cis-1,2-Dichloroethylene MR 4 2018
trans-1,2-Dichloroethylene MR 4 2018
DICHLOROMETHANE MR 4 2018
Ethylbenzene MR 4 2018
CHLOROBENZENE MR 4 2018
Styrene MR 4 2018
Tetrachloroethylene MR 4 2018
Toluene MR 4 2018
1,1,2-Trichloroethane MR 4 2018
Trichloroethylene MR 4 2018
Xylenes, Total MR 4 2018
LASSO MR 4 2018
Atrazine MR 4 2018
Di(2-ethylhexyl) adipate MR 4 2018
Di(2-ethylhexyl) phthalate MR 4 2018
Picloram MR 4 2018
Simazine MR 4 2018
Glyphosate MR 4 2018
1,2,4-Trichlorobenzene MR 4 2018
2,4-D MR 4 2018
1,2-Dichloropropane MR 4 2018

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 Gilbert 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 IA8531083 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
2021 TTHM MR 6 SDWIS / IA8531083 / 2950
2021 Total Haloacetic Acids (HAA5) MR 6 SDWIS / IA8531083 / 2456
2018 Carbon tetrachloride MR 4 SDWIS / IA8531083 / 2982
2018 o-Dichlorobenzene MR 4 SDWIS / IA8531083 / 2968
2018 p-Dichlorobenzene MR 4 SDWIS / IA8531083 / 2969
2018 cis-1,2-Dichloroethylene MR 4 SDWIS / IA8531083 / 2380
2018 trans-1,2-Dichloroethylene MR 4 SDWIS / IA8531083 / 2979
2018 DICHLOROMETHANE MR 4 SDWIS / IA8531083 / 2964
2018 Ethylbenzene MR 4 SDWIS / IA8531083 / 2992
2018 CHLOROBENZENE MR 4 SDWIS / IA8531083 / 2989
2018 Styrene MR 4 SDWIS / IA8531083 / 2996
2018 Tetrachloroethylene MR 4 SDWIS / IA8531083 / 2987
2018 Toluene MR 4 SDWIS / IA8531083 / 2991
2018 1,1,2-Trichloroethane MR 4 SDWIS / IA8531083 / 2985
2018 Trichloroethylene MR 4 SDWIS / IA8531083 / 2984

How Gilbert Water Supply Compares

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

Metric Gilbert Water Supply Iowa avg Federal benchmark
Total violations 164 77 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 5 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 1,211 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 (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 Gilbert Water Supply water safe to drink? ▼
Gilbert Water Supply (PWS ID: IA8531083) has 164 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,211 people using Groundwater sources.
How many people does Gilbert Water Supply serve? ▼
Gilbert Water Supply serves 1,211 people in Gilbert, Iowa. It is a Local-owned system using Groundwater water sources with 483 service connections.
What type of violations does Gilbert Water Supply have? ▼
Gilbert Water Supply has 164 total violations: 5 health-based violations (MCL exceedances or treatment failures), 155 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Gilbert Water Supply water? ▼
No PFAS testing data is available for Gilbert Water Supply under the EPA's UCMR5 monitoring program.
What water source does Gilbert Water Supply use? ▼
Gilbert 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.
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.