Public water system · IA5417026
ActiveDelta Water Supply
At a glance
Delta Water Supply (PWSID IA5417026) is an active community water system in Keokuk County, Iowa. It reports serving 264 people through 125 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
264
Service connections
125
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does Delta Water Supply compare with other water systems in Keokuk County?
By EPA's size categories, Delta Water Supply is a very small system (500 people or fewer). Keokuk County has 12 active public water systems. Its population served is well below the county average of 1,926 people per system, and accounts for 1.1% of the 23,108 people reported by systems filed under the county. Across Iowa, the 1,828 active systems average 1,718 people each. Nationally, the average active community water system reports serving 6,703 people, so Delta Water Supply is well below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Iowa has 1,084 active community water systems, 59% of the state's 1,828 active systems. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own. 156 Iowa systems (8.5%) list purchased groundwater as their primary source.
Who owns and regulates Delta Water Supply?
EPA lists Delta Water Supply as owned by a local government. The IA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 10 of the 12 active systems in Keokuk County (83%) are also owned by a local government.
Does Delta Water Supply have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 2025. The violations listed here began between July 1985 and July 2025. By type: 11 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminants or rules involved are Total trihalomethanes (TTHM), Haloacetic acids (HAA5), Consumer Confidence Rule and Lead and Copper Rule. EPA lists 10 as resolved and 2 as archived. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Archived |
| 2025-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Archived |
| 2005-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 1988-04-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1985-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | No | Resolved |
| 1985-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Cadmiumcode 1015 | No | Resolved |
| 1985-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Mercurycode 1035 | No | Resolved |
| 1985-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Fluoridecode 1025 | No | Resolved |
| 1985-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Seleniumcode 1045 | No | Resolved |
| 1985-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1985-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Bariumcode 1010 | No | Resolved |
| 1985-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chromiumcode 1020 | No | Resolved |
The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Delta Water Supply: frequently asked questions
Who runs Delta Water Supply?
Delta Water Supply (PWSID IA5417026) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Delta Water Supply serve?
Delta Water Supply reports serving 264 people through 125 service connections in Keokuk County, Iowa.
Where does Delta Water Supply get its water?
EPA SDWIS lists this system's primary water source as purchased groundwater. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own.
Does Delta Water Supply have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 2025. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Delta Water Supply's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Delta Water Supply's water quality report?
As a community water system, Delta Water Supply must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Keokuk County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Wapello Rural Water Assoc. | Keokuk + 3 more | 17,263 | Community | Purchased surface water |
| Sigourney Muni Water Works | Keokuk | 2,004 | Community | Groundwater |
| Keota Water Dept | Keokuk | 897 | Community | Groundwater |
| Hedrick Water Supply | Keokuk | 728 | Community | Purchased groundwater |
| What Cheer Water Supply | Keokuk | 646 | Community | Purchased groundwater |
| Richland Water Supply | Keokuk | 542 | Community | Groundwater |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Delta Water Supply, PWSID IA5417026, Iowa”, https://aquacensus.com/water-systems/iowa/delta-water-supply-ia5417026 (data as of October 1, 2026).