Public water system · IN5245011
ActiveDyer Water Department
At a glance
Dyer Water Department (PWSID IN5245011) is an active community water system in Lake County, Indiana. It reports serving 16,800 people through 6,374 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 5 violations for this system; none is health-based, and the most recent began in October 2018.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
16,800
Service connections
6,374
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Dyer Water Department compare with other water systems in Lake County?
By EPA's size categories, Dyer Water Department is a large system (10,001 to 100,000 people). Lake County has 110 active public water systems. Its population served is about 3.5 times the county average of 4,845 people per system, and accounts for 3.2% of the 532,973 people reported by systems filed under the county. Across Indiana, the 3,969 active systems average 1,456 people each. Nationally, the average active community water system reports serving 6,703 people, so Dyer Water Department is about 151% above 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. Indiana has 770 active community water systems, 19% of the state's 3,969 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 82 Indiana systems (2.1%) list purchased surface water as their primary source.
Who owns and regulates Dyer Water Department?
EPA lists Dyer Water Department as owned by a local government. The IN state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 24 of the 110 active systems in Lake County (22%) are also owned by a local government.
Does Dyer Water Department have drinking water violations?
EPA's records list 5 violations for this system; none is health-based, and the most recent began in October 2018. The violations listed here began between June 1980 and October 2018. By type: 3 monitoring and reporting, 1 monitoring and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 3 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 |
|---|---|---|---|---|
| 2018-10-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2001-12-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2000-10-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 1992-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1980-06-30 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
All 5 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.
Dyer Water Department: frequently asked questions
Who runs Dyer Water Department?
Dyer Water Department (PWSID IN5245011) is a community water system owned by a local government. It is regulated by the IN state drinking water program.
How many people does Dyer Water Department serve?
Dyer Water Department reports serving 16,800 people through 6,374 service connections in Lake County, Indiana.
Where does Dyer Water Department get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Dyer Water Department have any drinking water violations?
EPA's records list 5 violations for this system; none is health-based, and the most recent began in October 2018. 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 Dyer Water Department'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 5 violations for this system; none is health-based, and the most recent began in October 2018. For current results, consult the system's annual water quality report, EPA ECHO, or the IN state drinking water program.
Where can I find Dyer Water Department's water quality report?
As a community water system, Dyer Water Department 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 Lake County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Indiana American Water - Northwest | Lake | 210,510 | Community | Surface water |
| Hammond Water Works Department | Lake | 78,384 | Community | Surface water |
| Schererville Water Department | Lake | 30,000 | Community | Purchased surface water |
| Crown Point Water Works | Lake | 30,000 | Community | Purchased surface water |
| East Chicago Water Works | Lake | 26,370 | Community | Surface water |
| St. John Municipal Water Utility | Lake | 25,700 | Community | Groundwater |
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, “Dyer Water Department, PWSID IN5245011, Indiana”, https://aquacensus.com/water-systems/indiana/dyer-water-department-in5245011 (data as of October 1, 2026).