Wells, springs and mine sites with parameter concentrations that have equaled or exceeded drinking water standard(s), including location and parameter(s) are shown in Table 7.5-6A.  There are no impaired lakes or streams in this basin. Figure 7.5-8 shows the location of water quality occurrences keyed to Table 7.5-6.  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 7.5-6A.
• Fifty-eight wells have parameter concentrations that have equaled or exceeded drinking water standards.
• The most frequently equaled or exceeded parameter was fluoride.  Other parameters equaled or exceeded include arsenic, chromium, lead and nitrates.

Table 7.5-6 Water Quality Exceedences in the McMullen Valley Basin

Figure 7.5-8 McMullen Valley Basin Water Quality Conditions

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