Chloramine in drinking water
118 active public water systems in 8 states had a Chloramine violation in the past three years, and 15 have one that is still unresolved.
You are on Tapcensus, an independent guide to the EPA compliance records of every public water system in the United States. This page explains Chloramine and lists the water systems whose records include a related violation. It does not show measured levels.
Is Chloramine in the records for your water system?
Enter a ZIP code, town, or street address to see the water systems that serve your area, their status, and which rules and contaminants appear in their violations.
Enter a ZIP code, town, or street address.
The standard and what a violation means
Water systems with a Chloramine violation, by state
Active public water systems that reported at least one related violation to EPA in the past three years. Each state links to the list of its affected systems.
| State | Systems with violations, 3 yr | Share of active systems | Unresolved |
|---|---|---|---|
| Illinois | 47 | 1% | 4 |
| North Dakota | 26 | 7% | 2 |
| Oklahoma | 25 | 2% | 6 |
| Colorado | 11 | 0% | 2 |
| Kansas | 3 | 0% | 0 |
| Louisiana | 2 | 0% | 1 |
| North Carolina | 2 | 0% | 0 |
| Texas | 2 | 0% | 0 |
Largest water systems with a Chloramine violation
The ten biggest systems, by people served, whose records include a related violation in the past three years.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Aqua Illinois-Kankakee Kankakee · Kankakee County |
80,000 | 5 | 0 | |
|
Currituck County Water System Maple · Currituck County |
24,130 | 2 | 0 | |
|
Meridian MD Douglas County |
23,415 | 3 | 0 | |
|
Duncan Public Utilities Authority Stephens County |
23,000 | 2 | 0 | |
|
Bethany Oklahoma County |
20,307 | 4 | 0 | |
|
Anson County Water System Lilesville · Anson County |
13,880 | 3 | 0 | |
|
Herrin Herrin · Williamson County |
12,747 | 6 | 0 | |
|
Rogers CO Rwd # 3 Cot Sta Rogers County |
10,750 | 5 | 0 | |
|
Fosterburg Pwd Madison County |
7,940 | 2 | 0 | |
|
Duquoin Du Quoin · Perry County |
7,169 | 6 | 2 |
About this data
A system is counted once if any of its violations in the past three years involved Chloramine, including monitoring and reporting lapses. Rules violated and status in the systems table are for the whole system, not Chloramine alone. Counts cover active systems in all 50 states and the District of Columbia.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet.