LEAD AND COPPER NOTICE
The U.S. Environmental Protection Agency (EPA) and Montana Department of Environmental Quality (MDEQ) require Public Water Systems (PWS) to routinely monitor for Lead and Copper.
Title1 Lead and Copper Rule (LCR)2 , 56 FR 26460 - 26564, June 7, 1991
Purpose: Protect public health by minimizing lead (Pb) and copper (Cu) levels in drinking water, primarily by reducing water corrosivity. Pb and Cu enter drinking water mainly from corrosion of Pb and Cu containing plumbing materials
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General Rule Description: Establishes action level (AL) of 0.015 mg/L for Pb and 1.3 mg/L for Cu based on 90th percentile level of tap water samples. An AL exceedance is not a violation but can trigger other requirements that include water quality parameter (WQP) monitoring, corrosion control treatment (CCT), source water monitoring/treatment, public education, and lead service line replacement (LSLR).
More information and resources are available at:
EPA website
https://www.epa.gov/dwreginfo/lead-and-copper-rule
Montana Department of Environmental Quality website Lead and Copper Monitoring https://deq.mt.gov/water/Programs/dw-leadandcopper
2021 Lead & Copper Notice (112 KB)
2024 Lead & Copper Notice (104 KB)