Tapcensus

Glyphosate violations in Montana

9 active public water systems in Montana had a Glyphosate violation in the past three years. What Glyphosate is and why it matters.

Health effects: Long-term exposure above the MCL is associated with kidney and reproductive damage in animal studies. EPA's current classification does not designate glyphosate as a human carcinogen, though IARC classifies it as probably carcinogenic (Group 2A). This classification remains a subject of active scientific and regulatory debate.

Systems with a Glyphosate violation

Latest quarter first, then largest first
SystemServesStatusRules violated, 3 yrUnresolved
Wyola Water System
County 		281 10 1
Glacier View School
County 		265 3 0
Curious Minds Montessori Preschool
Stevensville · Ravalli County 		205 4 1
Cskt Division of Fire Management
County 		190 7 1
Bucks T4
Big Sky · Gallatin County 		153 2 0
Cmrwa Musselshell Judith Rural Water Sys
Harlowton · Wheatland County 		100 2 0
S&k Electronics
County 		80 3 1
All West Business Park Lot 3
Bozeman · Gallatin County 		70 4 0
Silver Run School
Carbon County 		50 3 0
About this data

A system is counted once if any of its violations in the past three years involved Glyphosate, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Glyphosate alone.

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 Montana 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.