Tapcensus

North Dakota

McLean County drinking water quality

13 active public water systems serve 9,697 people in McLean County. 8 are compliant, 5 had at least one EPA violation in the past three years, 1 is a designated serious violator, and 0 carry a health flag.

Active systems 13 12 community systems
People served 9,697 by public water systems
Systems with violations 5 38% of active systems, past 3 years
Serious violators 1 0 systems carry a health flag

Needs attention

Max City of ND2800619 · Max · Community water system · Serves 334 3 rules violated in the past three years. Unresolved: Lead and Copper Rule and Consumer Confidence Rule.

Community water systems

12 systems, largest first
SystemServesStatusRules violated, 3 yrUnresolved
Garrison Rural Water District
 1,805 0 0
McLean-Sheridan Water District-System 1
 1,800 0 0
Garrison City of
Garrison 		1,453 1 1
Washburn City of
Washburn 		1,246 0 0
Underwood City of
Underwood 		778 1 0
Turtle Lake City of
Turtle Lake 		581 0 0
McLean-Sheridan Water District-System 3
 400 0 0
McLean-Sheridan Water District-System 2
 390 0 0
Max City of
Max 		334 3 2
Riverdale City of
Riverdale 		205 0 0
Mercer City of
Mercer 		94 5 2
Coleharbor City of
Coleharbor 		79 3 0
Non-community systems (1: schools, campgrounds, workplaces, restaurants)

These systems serve places people visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
Rainbow Energy Center
 532 0 0
Inactive systems (31, no longer operating or reporting)

Kept for the record and excluded from the county totals above. Browse inactive systems.

About this data

Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.

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 North Dakota 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.