Check your location / site for the proposed seepage pit as a preliminary screening level evaluation of whether the surficial geologic unit conforms to the rule requirement for siting within valley-fill sediments in a basin-and-range alluvial basin.

Enter a latitude/longitude coordinate in decimal degrees or in degrees minutes seconds and click the Submit button. Coordinates are limited to Arizona and should be as accurate and precise as possible for the parcel location. Review of other best available maps at closer scales (100K, and preferably 24K) and site-specific evaluation should be used to confirm the surficial geologic units at the site scale. The large scale map used in this tool contains inherent boundary uncertainty at site scales and may not be accurate for all sites.

The Geologic Map of Arizona
Geologic Map Units
USGS National Geologic Map Database
Arizona Geological Survey
ADWR Well Registry (Wells55)

This high-level map is presented as one possible screening-level tool to evaluate whether the proposed seepage pit location may be within the requirements specified in R18-9-A311(B). It is possible that ADEQ may require additional sources of data to demonstrate compliance because of map or other limitations. This map is based on a digital version of AZGS Map 35 at a scale of 1:1,000,000 and latitude/longitude information entered by the applicant and there may be significant errors in the map presented and should be verified by the applicant prior to submittal to ADEQ or delegated agency. Other data sources or field data may be necessary to demonstrate the location complies with R18-9-A311(B). Best available data should be used in site evaluations. Neither the information presented, nor the map itself, are official documents.