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 7.7-4A.  There are no impaired lakes or streams in this basin.  Figure 7.7-8 shows the location of water quality occurrences keyed to Table 7.7-4.   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 7.7-4A.
• Ninety-one wells have parameter concentrations that have equaled or exceeded drinking water standards.
• The most frequently equaled or exceeded the parameter was fluoride.  Other parameters equaled or exceeded include arsenic, barium, chromium, lead, nitrate and total dissolved solids.

Table 7.7-4 Water Quality Exceedences in the Ranegras Plain Basin

Figure 7.7-8 Ranegras Plain Basin Water Quality Conditions

Arizona Water Atlas Home

Lower Colorado River Planning Area Home

References and Supplemental Reading for the Ranegras Plain Basin