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Feasibility Study <br />Water Treatment Plant <br />City of Lino Lakes, MN <br />WSB Project No. 015822-000 Page 12 <br />3.3 Emerging Contaminants <br />Every five years, the U.S. Environmental Protection Agency (EPA) reviews contaminants that <br />may be present in drinking water but are not yet regulated. Thirty (30) unregulated contaminants <br />are monitored each cycle under the Unregulated Contaminant Monitoring Rule (UCMR). The <br />current cycle is UCMR 4, and the City of Lino Lakes was randomly selected for sampling this <br />cycle. The notable unregulated contaminants in UCMR 4 include manganese, cadmium, and <br />boron. The City of Lino Lakes water supply has no detection of cadmium or boron. However, <br />manganese has been detected as discussed previously in this report. <br />In the upcoming UCMR 5, one notable focus will be the family of chemicals referred to as per- <br />and polyfluoroalkyl substances (PFAS), formerly known as PFCs. These contaminants are <br />present in the East Metro Area and were the subject of the 3M Settlement. MDH has developed <br />health-based guidance values for five PFAS compounds. The City’s wells were sampled and <br />tested for thirty-three types of PFAS compounds at the time of this report. PFOA was detected in <br />one well and PFBA in three wells. All concentrations were below the MDH health-based guidance <br />values for PFOA and PFBA.