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Phoenix AMA Water Quality

Sites with parameter concentrations that have equaled or exceeded drinking water standard(s) (DWS), including location and parameter(s) are shown in Table 8.1-8A.  Impaired lakes and streams with site type, name, length of impaired reach, area of impaired lake, designated use standard and parameter(s) exceeded is shown in Table  8.1-8B.  Figures 8.1-10 and 8.1-10A show the location of water quality occurrences keyed to Table 8.1-8.  Figures 8.1-11 and 8.1-11A show the location of contamination sites with site information show in Table 8.1-9.  All community water systems are regulated under the Safe Drinking Water Act and treat water supplies to meet drinking water standards.  Not all parameters were measured at all sites; selective sampling for particular constituents is common.  A description of water quality data sources and methods is found in Volume 1, Appendix A. 

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

  • Refer to Table 8.1-8A.
  • One thousand five hundred and one sites have parameter concentrations that have equaled or exceeded DWS.
  • Frequently equaled or exceeded parameters include nitrate, fluoride, arsenic, manganese and organics
  • Other parameters equaled or exceeded include cadmium, lead, radionuclides, selenium, beryllium, chromium, total dissolved solids, mercury and barium.

Lakes and Streams with impaired waters

  • Refer to Table 8.1-8B and Figure 8.1-10A.
  • Water quality standards were equaled or exceeded in seven stream reaches and three lakes.
  • The most common parameter equaled or exceeded was pesticides.
  • One reach, Queen Creek - from headwaters to the mining discharge, is part of the ADEQ water quality improvement effort called the Total Maximum Daily Load (TMDL) Program.  Sampling is ongoing at the site at this time.
  • There are four effluent dependent reaches in the AMA: Gila River, Salt River, Agua Fria River and Queen Creek.

Contamination Sites

  • Refer to Figures 8.1-11 and 8.1-11A and Table 8.1-9
  • There are 39 Voluntary Remediation Program sites, 12 Water Quality Assurance Revolving Fund sites, seven active National Priority List sites, one Department of Defense Site and nine Resource Conservation and Remediation Act sites.
  • The most common contaminants are Volatile Organic Compounds (VOCs).

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Table 8.1-8 Water Quality Exceedences in the Phoenix AMA

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Figure 8.1-10 Phoenix AMA Water Quality Conditions

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Figure 8.1-10A Phoenix AMA Impaired Lakes and Streams

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Table 8.1-9 Contamination Sites in the Phoenix AMA

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Figure 8.1-11 Phoenix AMA Contamination Sites

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Figure 8.1-11A Phoenix AMA Contamination Sites (Inset)


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