About us
Customer Care
Quick Pay
On January 31, 2020, Tennessee Wastewater Systems, Inc., filed a Joint Petition with Staff of the Tennessee Public Utility Commission to increase rates for wastewater services. Service rates were last increased on July 8, 2009. Click the link below for more detail.
Full Notice
TWSI has updated statewide and Williamson County bonding rates effective September 1st (October 1st billing cycle) to reflect the latest TRA mandated true-up. These rates are expected to remain in effect until the next true-up period, which is currently is set to be every 12 months.
All Adenus Utility Customers are now able to manage their accounts online! This includes checking your balance, viewing payment history, and making online payments. It's all part of our newly enhanced customer care section of the site. Give it a try by clicking the link below.
Try it out
A piece on Adenus (our parent company) was recently aired on select TV stations across the southeast. If you missed it, you can watch it by clicking the link below.
Watch the spot

Three words that come to mind when describing Adenus® decentralized wastewater systems. Tennessee Wastewater is the exclusive utility provider for Adenus® systems in the state of Tennessee.

Tennessee Wastewater is the #1 decentralized utility in Tennessee in terms of customer base, service territory, and active treatment systems. We pride ourselves on our customer service quality and system reliability.

Browse our site to learn what we offer our customers.

Adenus® systems are comprised of an effluent collection system, secondary treatment plant, and drip dispersal. The tank in your yard settles the waste stream into three distinct layers during primary treatment:


The effluent filter ensures that only the effluent is collected from the tank and sent to the plant for processing. As the scum accumulates, it transforms into sludge and settles. The sludge is mostly consumed by the micro-organisms present in the tank.
Copyright © 2020 Adenus Group. All rights reserved.
Design by Stylish Website Templates
851 Aviation Parkway
Smyrna, TN 37167

Utility Customer Care: 888.3.ADENUS
Maintenance Hotline: 877.669.0786