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Water Quality

Tulsa's Water's annual water quality reports are the “consumer confidence reports” produced annually to describe the overall quality of water from its raw collection and storage to the treated water at your tap. The Environmental Protection Agency mandates these reports. The report lists any regulated compound that was tested for in the previous calendar year that had a detectable result, even if the result was well below the acceptable levels set by the Safe Drinking Water Act. The report is distributed in June of each year to every utility customer in Tulsa. To obtain a hard copy please call Water Quality Assurance at (918) 591-4378.

Past Water Reports

Each year the City of Tulsa provides a Water Quality Report for those who are using water treated by our Treatment Plants. This report meets a federal reporting requirement. Residents can view reports for previous years through the following links.

2017 Water Quality Report
2017 Water Quality Report
2017 Water Quality Report in Espanol
2017 Spavinaw Water Quality Report

2016 Water Quality Report
2016 Water Quality Report
2016 Water Quality Report in Espanol
2016 Spavinaw Water Quality Report

2015 Water Quality Report
2015 Water Quality Report
2015 Water Quality Report in Espanol
Spavinaw Water Quality Report

2014 Water Quality Report
2014 Water Quality Report
2014 Water Quality Report in Espanol
2014 Spavinaw Water Quality Report

2013 Water Quality Report
2013 Annual Water Quality Report
2013 Annual Water Quality Report - in Espanol

2012 Water Quality Report
2012 Water Quality Report
2011 Spavinaw Report

For back copies of the Consumer Confidence Report, please contact Water Quality Assurance at (918) 591-4378.

Water Hardness
Water is referred to as hard or soft because of the presence of minerals in the water. In eastern Oklahoma, much of the water used for public water supply comes from lakes (surface water). This water has flowed over the ground in streams or rivers until it reaches a lake where it is stored and eventually consumed. Another type of water - groundwater - flows through soil and permeable rock before it trickles out into a stream and eventually a lake. As water moves, it picks up minerals from the rocks and soil. Two of these minerals, calcium and magnesium, accumulate and create the "hardness" rating of your water. This rating is measured in Parts Per Million (ppm) or Grains Per Gallon (gpg). The more minerals present in the water, the "harder" it is.

Water hardness is not a safety issue. Water is safe to drink no matter what the hardness rating is.

Grains Per Gallon (gpg) Parts Per Million (ppm) Rating
less than 1.0 less than 17.1

SOFT

1.0 - 3.5 17.1 - 60

Slightly Hard

3.5 - 7.0 60 - 120

Moderately Hard

7.0 - 10.5 120-180

HARD

over 10.5 over 180

Very HARD

Hard Water Evidence in Your Home

Hard Water Benefits