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EPA drinking water rule · 140

Ground Water Rule

See how this rule appears in the reported histories and find systems with unresolved health-based records.

Violation records shown
17,898
Systems with a linked record
5,713
Unresolved health-based records
1,875

Rule records by EPA-listed state

Linked community water records
Listed stateSystemsViolation recordsUnresolved health-based records
Alabama10120
Alaska12446145
American Samoa7490
Arizona237593106
Arkansas21690
California9225257
Colorado8614238
Connecticut641434
Delaware110
District of Columbia51714
Florida6563,2540
Georgia1131370
Idaho20465593
Indiana10222341
Iowa30360
Kansas5915425
Kentucky5400
Louisiana3711,716727
Maine20280
Maryland6124
Massachusetts32501
Michigan991208
Minnesota9105
Mississippi6011125
Missouri24560417
Montana1022147
Nebraska4248
Nevada4217129
New Hampshire751025
New Jersey921951
New Mexico3201,583325
New York28410
North Carolina41470
North Dakota550
Northern Mariana Islands13430
Ohio395212
Oklahoma1392950
Oregon28286718
Pennsylvania1,0033,63656
Puerto Rico240
Rhode Island8121
South Carolina44600
South Dakota30362
Tennessee10330
Texas4225597
Utah6152
Vermont45620
Virginia46813
Washington3614825
West Virginia78509139
Wisconsin8513310
Wyoming588215

Systems with unresolved health-based records for this rule

EPA data and scope

How to read the records

The enforcement snapshot is federal fiscal 2026Q3. The EPA archive labels its violation file October 13, 2026. EPA says federal reporting can lag by several months. For current advisories, check your utility or local drinking-water authority.

EPA data dictionary and files · EPA reporting and enforcement FAQ · Find an annual water quality report · How to get the report from your utility