High Plains Aquifer Water-Level Monitoring Study
Number of observation wells measured for water-level comparison periods predevelopment to 2000 through 2013

^a Click on year to view reference.
^b Includes wells measured in 1996 to 1999 because many wells in New Mexico are measured on a 5-year schedule
^c Includes wells measured in 1997 to 2000 because many wells in New Mexico are measured on a 5-year schedule
^d Includes wells measured in 1998 to 2001 because many wells in New Mexico are measured on a 5-year schedule
^e Includes wells measured in 1999 to 2002 because many wells in New Mexico are measured on a 5-year schedule
^f Includes wells measured in 2001 to 2004 because many wells in New Mexico are measured on a 5-year schedule
^g Includes wells measured in 2003 to 2006 because many wells in New Mexico are measured on a 5-year schedule
^h Includes wells measured in 2005 to 2008 because many wells in New Mexico are measured on a 5-year schedule
ⁱ Includes wells measured in 2007 to 2010 because many wells in New Mexico are measured on a 5-year schedule
^j Includes wells measured in 2009 to 2012 because many wells in New Mexico are measured on a 5-year schedule
^k Includes wells measured in 2012 because few wells were measured in Wyoming in 2013