. 2016 Aug 23;9(2):113–124. doi: 10.1007/s12403-016-0226-6

Table 1.

Previous water quality surveys of unregulated water sources on the Navajo Nation

Water quality survey	Lead agency	Sampling area (management agency)	Years	UWSs sampled	Reporting limit
					Arsenic	Uranium
Abandoned Uranium Mines Project^a	US EPA, US Army Corps of Engineers^o,p	Chinle, Fort Defiance, Shiprock and Western	1993–2000	183	10 µg/L^h	Variable pCi/Lⁱ
Briet Sampling^b	US Geological Survey^q	Fort Defiance	2001–2004	18	1 µg/L^j	0.01 µg/L^j
DiNEH Project^c	University of New Mexico, Southwest Research and Information Center, Diné Network for Environmental Health^r,s,t,u,v,w	Eastern	2003–2010	97	5 µg/L^h,k,l,m	0.25 µg/L^k,l
Navajo Nation Unregulated Water Source Sampling^d	Navajo Nation EPA and Centers for Disease Control and Prevention^x	Chinle, Fort Defiance, Shiprock and Western	2006–2007	215	1 µg/L^l	1 µg/L^l
Navajo Nation Drinking Water Source Sampling^e	US EPA Region 9^s	Eastern	2008	48	1 µg/L^l	0.5 µg/L^l
Radiation Assessment of Unregulated Drinking Water Sources^f	US EPA Region 9^u	Eastern	2009	32	5 µg/L^l	1 pCi/Lⁿ
Navajo Water Well Sampling^g	US EPA Region 9^u	Eastern	2010	11	5 µg/L^l	1 pCi/Lⁿ

^a US EPA (2000a); ^b US EPA (2006); ^c Unpublished project data and deLemos et al. (2009); ^d Unpublished project data and Murphy et al. (2009); ^e US EPA Region IX (2008); ^f US EPA Region IX (2010); ^g US EPA Region IX (2011)

Analysis Methods: ^h US EPA (1994); ⁱ Krieger and Whittaker (1980); ^j USGS (2002); ^k US EPA (2007a); ^l US EPA (2007b); ^m US EPA (1996); ⁿ US DOE (2000)

Laboratory: ^o Quanterra Environmental Laboratories; ^p Missouri River Laboratory; ^q NationalWater Quality Laboratory; ^r Carlsbad Environmental Monitoring & Research Center; ^s US EPA Region IX Laboratory; ^t US EPA Radiation and Indoor Environments National Laboratory; ^u GEL Laboratories; ^v New Mexico Scientific Laboratory Division; ^w Navajo Tribal Utility Authority Laboratory; ^x Colorado Department of Public Health and Environment Laboratory