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Securing Arizona's Water Future
Water Quality in the San Rafael Basin

Sites with parameter concentrations that have equaled or exceeded drinking water standard(s) (DWS), including location and parameter(s) are shown in Table 3.12-6A.  Impaired lakes and streams with site type, name, length of impaired stream reach, area of impaired lake, designated use standard and parameter(s) exceeded is shown in Table 3.12-6B.  Figure 3.12-9 shows the location of exceedences and impairment keyed to Table 3.12-6.  A description of water quality data sources and methods is found in Volume 1, Appendix A.  Not all parameters were measured at all sites; selective sampling for particular constituents is common. 

Well, Mine or Spring sites that have equaled or exceeded drinking water standards (DWS)

  • Refer to Table 3.12-6A.
  • Six sites have parameter concentrations that have equaled or exceeded DWS. 
  • Frequently equaled or exceeded parameters include arsenic and lead. 
  • Other parameters commonly equaled or exceeded in the sites measured in this basin were radionuclides, cadmium and antimony.

Lakes and Streams with impaired waters

  • Refer to Table 3.12-6B.
  • Water quality standards for mercury were equaled or exceeded in Parker Canyon Lake.
  • Parker Canyon Lake is part of the ADEQ water quality improvement effort called the Total Maximum Daily Load  (TMDL) program.  Sampling to create a TMDL report is ongoing.

Click to view Table 3.12-6

Click to view Table 3.12-6 Water Quality Exceedences in the San Rafael Basin

Click to view Figure 3.12-9

Click to view Figure 3.12-9 San Rafael Basin Water Quality Conditions

 

 

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