Parameter name is
localAquiferCd. Use this to filter sites that exist in specified local aquifers.
Note: not all sites have been associated with local aquifers. Enter one or more local aquifer codes in the field, separated by commas. A local aquifer code is 10 characters, beginning with the state's abbreviation followed by a colon followed by the local aquifer code. A complete list of local aquifer codes can be found
here. To translate the state code associated with the local aquifer, you may need
this reference. Example:
&localAquiferCd=AL:111RGLT,AL:111RSDM returns groundwater sites for the Regolith and Saprolite local aquifers in Alabama. The default is
all, which means the results are not filtered to exclude any local aquifer codes. It can be specified if desired, however, if a list is provided you cannot exceed 1000 local aquifer codes. ex:
&localAquiferCd=all.