Public water system · IL0490150
ActiveDieterich
At a glance
Dieterich (PWSID IL0490150) is an active community water system in Effingham County, Illinois. It reports serving 900 people through 432 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. EPA's records list 10 violations for this system; 1 is health-based, and the most recent began in August 2015.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
900
Service connections
432
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does Dieterich compare with other water systems in Effingham County?
By EPA's size categories, Dieterich is a small system (501 to 3,300 people). Effingham County has 14 active public water systems, and Dieterich is the 6th-largest of them by population served. Its population served is about half of the county average of 1,721 people per system, and accounts for 3.7% of the 24,087 people reported by systems filed under the county. Across Illinois, the 3,872 active systems average 3,204 people each. Nationally, the average active community water system reports serving 6,703 people, so Dieterich 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. Illinois has 1,773 active community water systems, 46% of the state's 3,872 active systems. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own. 348 Illinois systems (9%) list purchased groundwater as their primary source.
Who owns and regulates Dieterich?
EPA lists Dieterich as owned by a local government. The IL state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 9 of the 14 active systems in Effingham County (64%) are also owned by a local government.
Does Dieterich have drinking water violations?
EPA's records list 10 violations for this system; 1 is health-based, and the most recent began in August 2015. The violations listed here began between June 1977 and August 2015. By type: 9 monitoring and reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Chlorine (2 of them). EPA lists 8 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 |
|---|---|---|---|---|
| 2015-08-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2015-08-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2011-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2008-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 1996-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Nitritecode 1041 | Yes | Resolved |
| 1996-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Ethylbenzenecode 2992 | No | Resolved |
| 1996-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1996-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Xylenes, Totalcode 2955 | No | Resolved |
| 1993-11-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1977-06-30 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
All 10 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.
Dieterich: frequently asked questions
Who runs Dieterich?
Dieterich (PWSID IL0490150) is a community water system owned by a local government. It is regulated by the IL state drinking water program.
How many people does Dieterich serve?
Dieterich reports serving 900 people through 432 service connections in Effingham County, Illinois.
Where does Dieterich 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 Dieterich have any drinking water violations?
EPA's records list 10 violations for this system; 1 is health-based, and the most recent began in August 2015. 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 Dieterich'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. EPA's records list 10 violations for this system; 1 is health-based, and the most recent began in August 2015. For current results, consult the system's annual water quality report, EPA ECHO, or the IL state drinking water program.
Where can I find Dieterich's water quality report?
As a community water system, Dieterich 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 Effingham County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Effingham | Effingham | 12,252 | Community | Surface water |
| Lake Sara Area Water Co-Op, Inc.. | Effingham | 3,352 | Community | Purchased surface water |
| Altamont | Effingham | 2,300 | Community | Surface water |
| Teutopolis | Effingham | 2,018 | Community | Groundwater |
| Heartville PWD | Effingham | 1,092 | Community | Purchased surface water |
| Ej Water-Watson | Effingham | 754 | Community | Purchased surface water |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Dieterich, PWSID IL0490150, Illinois”, https://aquacensus.com/water-systems/illinois/dieterich-il0490150 (data as of October 1, 2026).