EPA Region 8 directly audits and certifies the primary state laboratories in Colorado, Montana, Utah, North Dakota and South Dakota. Additionally, EPA Region 8 Lab personnel perform on-site evaluations and certify Wyoming laboratories for particular drinking water analytes and analytical methods.

The first list below contains the laboratories in Wyoming that are routinely certified by EPA Region 8.

The second table below is a list of laboratories that were previously certified for the analytes shown, either by EPA R8 or by other state labs through reciprocal agreement.

TABLE DISCLAIMER: It is the responsibility of the water system to ensure that the laboratory certification is current for the analyte of interest.

• EPA R8 Certified Drinking Water Labs in Wyoming (PDF)(2 pp, 96 K, 12/09/2020)
• EPA R8 Previously Certified Drinking Water Labs (PDF)(5 pp, 140 K, 01/30/2018)