Water: Septic (Onsite / Decentralized) Systems
The Wastewater Information System Tool - TWIST
The Wastewater Information System Tool (TWIST) is an off-the-shelf, user-friendly management tool that will allow state and local health departments to effectively inventory and manage small wastewater treatment systems in their jurisdictions. It is designed to track information related to homes and facilities served, permits, site evaluations, types of systems, inspections and complaints.
EPA developed TWIST as a comprehensive MIS system with a Microsoft Access database for managing system information. The system accommodates a wide variety of queries, list reports and mapping applications if users provide relevant data. It is designed to help identify and capture important system inventory and service information, and to help standardize management information so data can be easily transferred to other systems. TWIST will help answer key questions for public health and water resource program managers, such as:
- How many systems near drinking water sources have not been maintained?
- Are there systems older than 35 years sited closer than 50 feet from the lake shore?
- Which systems require inspection within the next year?
- How many systems of similar types have malfunctioned over the last three years?
For more information about TWIST, click the link for the user guide or flyer below:
- TWIST User Guide PDF (30pp, 1.1mb, About PDF) Published: 2006. (EPA 832-E-06-001)
- TWIST Flyer PDF (2pp, 785kb, About PDF)
EPA Webcast on using TWIST as a tool for inventorying and managing individual and clustered wastewater treatment systems - audio and slides link to EPA's Watershed Academy web site
TWIST is now available online. Below are instructions if you are using TWIST for the first time or if you have ordered a CD previously and need to update your version.
TWIST Instructions for New Users
TWIST Patch for Existing Users
|Click here to download TWIST||Click here to download the TWIST Patch|
To order a free CD-ROM copy of TWIST, call 1-(800)490-9198 or (513) 489-8190, or send a written request to:
P.O. Box 42419M
Fax: (301) 604-3408
Please remember to include your address and phone number in your request.