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EPA's UCMR 5 data lists water systems on tribal lands by EPA region (Region 6) rather than by state.
EPA UCMR 5 results for 18 public water systems. 2 had at least one PFAS detected; 1 had a highest single PFOA or PFOS result above 4.0 ppt.
UCMR 5 is a one-time EPA monitoring program, not a compliance determination. The values shown are the highest single sample result at any of the system's sampling points; one result above 4.0 ppt does not mean the system violates the PFAS rule, which is judged on running annual averages under separate compliance monitoring. Results describe the public water system, not an individual home.
| Water system | Serves | PFOA max (ppt) | PFOS max (ppt) | PFAS detected |
|---|---|---|---|---|
| Chickasaw Winstar 062004336 | ND | ND | 0 | |
| Eastern Shawnee 061000101 | ND | ND | 0 | |
| Isleta Eastside 063501109 | ND | ND | 0 | |
| Isleta Shea-Whiff 063503109 | ND | ND | 0 | |
| Kickapoo Traditional Tribe 061620001 | ND | ND | 1 | |
| LDC Laguna RT 66 Casino 063506111 | ND | ND | 0 | |
| Laguna Valley 063503111 | ND | ND | 0 | |
| Mescalero Inn of the Mt. Gods 063506008 | ND | ND | 0 | |
| Pojoaque South 063501100 | ND | ND | 0 | |
| Pottawatomie Co. RWD #3 (Dale Plant) 061020808 | ND | 4.1 | 2 | |
| Quapaw Downstream Casino & Resort 062005840 | ND | ND | 0 | |
| San Felipe Black Mesa Casino 063503115 | ND | ND | 0 | |
| Sandia Resort & Casino 063506114 | ND | ND | 0 | |
| Santa Ana Westside 063503118 | ND | ND | 0 | |
| Santo Domingo Pueblo 063500120 | ND | ND | 0 | |
| Taos Pueblo 063500191 | ND | ND | 0 | |
| Tunica-Biloxi Tribe of La 061800001 | ND | ND | 0 | |
| Zuni Pueblo 063501124 | ND | ND | 0 |
ND = not detected (below the 4 ppt UCMR 5 reporting level). Values are the highest single sample result, not an annual average.