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Quality Reports

Water Service

Quality Reports for Water in the Tohono O’odham Nation

The Tohono O’odham Utility Authority is committed to providing safe drinking water to the Tohono O’odham Nation. In accordance with regulations from the Environmental Protection Agency (EPA), we provide a yearly water quality report to our customers. These reports offer information about the quality of each water system on the reservation and they specify what, if any, contaminants are present and in what amount.

Any levels exceeding acceptable standards are noted. Our water services personnel diligently monitor the water quality throughout the Nation, and we address any issues as soon as they arise.
A grandmother and her granddaughter sitting at the kitchen table together, each has a glass of clean drinking water in their hands

Water Quality Report 2024

Water Quality Report 2023

Water Quality Report 2022

Water Quality Report 2021

 

Water Quality Report 2020

Water Quality Report 2019

Water Quality Report 2018

Water Quality Report 2017

Water Quality Report 2016

The TOUA Water Department on the Tohono O’odham Nation is very proud to provide you with the 2016 Annual Drinking Water Quality Report in order to keep you informed of the water quality and services we delivered to you over the past year. Also included is the Tucson Water’s Annual Report for the customers that live in the San Xavier and Mission View area who are currently receiving Tucson Water.
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Water Quality Report 2015

This report is a snapshot of your water quality. Included are details about where your water comes from, what it contains, and how it compares to standards set by regulatory agencies. We are committed to providing you with information because informed customers are our best allies.
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Water Quality Report 2014

Why do I need to read this? In 1996, Congress passed amendments that require drinking water systems to give consumers important information about their water, including where it comes from, what is in the water, and how your water quality compares to federal standards. This report is brought to you in accordance with EPA’s 40 Code of Federal Regulations NPDWR Parts 141 and 142. We want you to understand the efforts we make to continually improve the water treatment process and protect our water resources. It is recommended that you keep this report as a reference source, as it provides useful information, as well as contacts and phone numbers you may need from time to time.
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Water Quality Report 2013

The Water We Drink In 2013, TOUA served approximately 3000 water customers on the Tohono O’odham Nation. The water supply came from 62 ground water wells located in and around Tohono O’odham communities. Approximately 1.0 parts per million (ppm) of chorine (12.5 % sodium hypo- chlorite solution) is added to the drinking water supply at wells sites to provide assurance that water delivered to customers will remain free of microbiological contamination. This is also ensures that the water meets microbiological drinking water standards from the time it is pumped from the ground until it reaches the customer’s tap.
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Water Quality Report 2012

The Water We Drink The TOUA Water Department professionals within the Tohono O’odham Nation are very proud to provide you with the 2012 Annual Drinking Water Quality Report in order to keep you informed of the water quality and services we delivered to you over the past year. Our primary commitment is, and always will be, to provide you with a safe and dependable supply of drinking water. If you are a non- English speaking resident you may call TOUA at 383-2236 for a Tohono O’odham translation. The Utility Authority has regularly scheduled board meetings. If you have any questions about the meetings, this report, or questions concerning your water quality, please contact the water quality control laboratory at 520-383-5832. We want our valued customers to be informed about their drinking water quality.
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Water Quality Report 2011

The Water We Drink In 2011, TOUA served approximately 3000 water customers in the Tohono O’odham Nation. The water supply came from 65 ground water wells located in and around Tohono O’odham communities. Approximately 1.0 parts per million (ppm) of chlorine (12.5 % sodium hypo-chlorite solution) is added to the drinking water supply at well sites to provide assurance that water delivered to customers will remain free of microbiological contamination. This also ensures that the water meets microbiological drinking water standards from the time it is pumped from the ground until it reaches the customer’s tap.
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Water Quality Report 2010

The Water We Drink In 2010, TOUA served approximately 3000 water customers in the Tohono O’odham Nation.The water supply came from 66 ground water wells located in and around Tohono O’odhamcommunities. Approximately 1.0 parts per million (ppm) of chlorine (12.5 % sodium hypochloritesolution) is added to the drinking water supply at well sites to provide assurance that water delivered to customers will remain free of microbiological contamination. This also ensures that the water meets microbiological drinking water standards from the time it is pumped from the ground until it reaches the customer’s tap.
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Water Quality Report 2009

The Water We Drink In 2009, TOUA served approximately 3000 water customers in the Tohono O’odham Nation.The water supply came from 66 ground water wells located in and around Tohono O’odhamcommunities. Approximately 1.0 parts per million (ppm) of chlorine (12.5 % sodium hypochloritesolution) is added to the drinking water supply at well sites to provide assurance that water delivered to customers will remain free of microbiological contamination. This also ensures that the water meets microbiological drinking water standards from the time it is pumped from the ground until it reaches the customer’s tap.
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Water Quality Report 2008

The Water We Drink In 2008, TOUA served approximately 3000 water customers in the Tohono O’odham Nation.The water supply came from 68 ground water wells located in and around Tohono O’odhamcommunities. Approximately 1.0 parts per million (ppm) of chlorine (12.5 % sodium hypochloritesolution) is added to the drinking water supply at well sites to provide assurance that water delivered to customers will remain free of microbiological contamination. This also ensures that the water meets microbiological drinking water standards from the time it is pumped from the ground until it reaches the customer’s tap.
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Water Quality Report 2007

The Water We Drink In 2007, TOUA served approximately 3000 water customers in the Tohono O’odham Nation.The water supply came from 66 ground water wells located in and around Tohono O’odham communities. Approximately 1.0 parts per million (ppm) of chlorine (12.5 %sodium hypochlorite solution) is added to the drinking water supply at well sites to provide assurance that water delivered to customers will remain free of microbiological contamination. This also ensures that the water meets microbiological drinking water standards from the time it is pumped from the ground until it reaches the customer’s tap.
View Report

Water Quality Report 2006

The Water We Drink In 2006, TOUA served approximately 3000 water customers in the Tohono O’odham Nation. The water supply came from 73 ground water wells located in and around Tohono O’odham communities. Approximately 1.0 parts per million (ppm) of chlorine (12.5 %sodium hypo chlorite solution) is added to the drinking water supply at well sites to provide assurance that water delivered to customers will remain free of microbiological contamination. This also ensures that the water meets microbiological drinking water standards from the time it is pumped from the ground until it reaches the customer’s tap.
View Report
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