Links:

Wastewater Publications

http://tcebookstore.org/pubbrowse.cfm?catid=89

Texas/County Wastewater Rules

http://info.sos.state.tx.us/pls/pub/readtac$ext.ViewTAC?tac_view=4&ti=30&pt=1&ch=285

Texas Public Drinking Water Rules

http://info.sos.state.tx.us/pls/pub/readtac$ext.ViewTAC?tac_view=4&ti=30&pt=1&ch=290