National Drinking Water
USEPA Unregulated Contaminant Monitoring Rule 2 (UCMR2). US Environmental Protection Agency Approval for List 1 Assessment Monitoring by EPA Methods 527 and 529, List 2 Screening Survey by EPA Methods 521, 525.2 and 535.
Wisconsin
For a complete listing of Wisconsin certification under NR 149 , please view the following PDF....
WI Certifications
Michigan
The State of Michigan Department of Public Health, Division of Water Supply, has granted NLS reciprocal certification for the Safe Drinking Water Act (SDWA) parameters listed above.
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Certifications 
