Contact Info

Document Library

Necessary, inc. has started to assemble a collection of documents to help our clients to assess their needs and help us help you.

Operation and Maintenance Guide for Conventional Absorption On-site Sewage Facilities - Septic_Standard.pdf

O & M Guide for Mound Type On-Site Sewage Facilities - Septic_Mound.pdf

O & M Guide for Low Pressure Dosed Trench On-site Sewage Facilities - Septic_LPD.pdf

O & M Guide for On-site Sewage Facilities with Aerobic Treatment Units and Spray Irrigation - Aerobic_Spray.pdf

O & M Guide for On-site Sewage Facilities with Aerobic Treatment Units and Low Pressure Dosed Disposal Trenches - Aerobic_LPD.pdf

O & M Guide for Drip Emitter On-Site Sewage Facilities - Aerobic_Drip.pdf

Preparation of the On-Site Sewage Facility for Inspection - Prep_Inspection.pdf

Request Records from Travis County (form no longer required)
To get on-site sewage facility records from Travis County, email tnr.openrecords@co.travis.tx.us and request digital copies of the on-site sewage facility records for a particular address.

Request Records from Hays County - HaysCoRcdReq.pdf
To get on-site sewage facility records from Hays County, complete this form and email it to permits@co.hays.tx.us

Resources On the Web

Necessary, inc. has listed links to web sites that can provide additional infomation about On-site Sewage Facilities and regulations that might pertain to your system/location.

City of Austin Water Utility OSSF Program
"Water Utility" was previously called the "Water and Wastewater Department" http://www.austintexas.gov/ossf

LCRA's OSSF Program

Williamson County Engineer
Williamson County On-Site Sewage Facilities Program http://www.wilco.org/ossf

Hays County Environmental Health
Hays County On-Site Sewage Facilities Program https://hayscountytx.com/departments/development-services/

TCEQ (TNRCC) Onsite program


How to find a licensed OSSF installer or site evaluator


Texas AgriLife Extension (A & M Extension Service)
Excellent information and Fact Sheets. http://ossf.tamu.edu/onsite-wastewater-treatment-systems-owts/

EPA Onsite Manual
This link should give the latest version of the EPA Onsite Wastewater Treatment Systems Manual. Scroll down to "Manuals" and click on the link. http://www.epa.gov/septic/onsite-wastewater-treatment-and-disposal-systems

National Environmental Services Center (Small Flows Clearinghouse)

National On-site Wastewater Recycling Association

Travis Central Appraisal District - Property information for Travis County. http://www.traviscad.org/

Williamson Central Appraisal District - Property information for Williamson County. http://www.wcad.org/

Bastrop County Tax Office
Property information for Bastrop County http://www.bastroptac.com/

Hays County Appraiser's Office
Hays Central Appraisal District http://www.hayscad.com/