The Norman Transcript


October 1, 2013

Norman utilities officials say city is in process of switching to ferric sulfate

NORMAN — Treated water from Lake Thunderbird will soon be aluminum free, according to Norman utilities officials.

“We’re switching from aluminum sulfate to ferric sulfate, and it’s working great,” Water Plant Manager Chris Mattingly said. “We’re going to switch (to ferric sulfate). We’ve already switched one clarifier, and we’re waiting for the opportunity to switch to the other big clarifier.”

Right now, about one-third of the lake water is being treated with the ferric sulfate. The remaining two-thirds of the lake water is still being treated with aluminum sulfate.

When that aluminum sulfate is used up, the city will transition to ferric sulfate for all treatment. During the trial period, the water treated with ferric sulfate was tested for iron content, and none was detected in the finished water.

The city will use up the rest of its aluminum sulfate to not to be wasteful, and the changeover should be complete by the end of the month.

Iron is a primary contaminant, so city officials wanted to verify that using ferric sulfate would not put iron into the water.

Iron causes more staining and corrosion to equipment, Water Treatment Plant supervisor Bryan Hapke told The Transcript earlier this year. Both factors increase maintenance, and corrosion can shorten equipment life.

Norman’s current lake water treatment method resulted in an aluminum content of about 1.0 to 1.2 parts per million in the finished water. That’s at least five times the recommended limit.

Whether aluminum is a health issue is debatable. A study as early as 1989 linked Alzheimer’s to the aluminum content of drinking water. However, results from a variety of studies since then have had conflicting results, and the debate about aluminum has become notorious in scientific circles.

Aluminum does affect taste and odor.

“EPA sets a recommended limit of 0.05 to 0.2 parts per million as a secondary contaminant,” Hapke said. “Secondary contaminants are not considered to represent a risk to human health but cause aesthetic problems.

Text Only | Photo Reprints
  • Shelter construction ongoing; residents voice concerns

    A regular quarterly meeting of the Animal Shelter Oversight Board prompted Norman residents to speak up about more than just a photo release issue Monday night involving Friends of the Animals of Norman volunteers and the city of Norman. ...

    July 30, 2014

  • Voter registration deadline is Friday

    Friday is the last day to apply for voter registration to be eligible to vote in the Aug. 26 Runoff Primary Election. Races include federal, state and county offices, but for Cleveland County voters, the field is limited....

    July 30, 2014

  • Breast Care Center will relocate to HealthPlex

    The Norman Regional Health System will move its Breast Care Center to the HealthPlex campus, making it more accessible for patients, hospital officials said Monday. At its monthly board meeting, the Norman Regional Hospital Authority ...

    July 29, 2014

  • Officials say transparency lacking in Wal-Mart zoning

    Norman city staff recently admitted to withholding information from the public regarding a controversial zoning change in southeast Norman. If approved by the city council, the proposal will allow a Wal-Mart supercenter at Cedar Lane and ...

    July 25, 2014

  • Fracking Operation Norman library to host community dialogue about fracking

    Are Oklahoma oil companies an oligarchy that is controlling state policy? Is fracking safe? These and other topics will be the subject of an upcoming Fracking Forum from 7 to 8:30 p.m. Aug. 11 in the Norman Public Library’s Lowry Room, 225 ...

    July 24, 2014 1 Photo

  • City manager calls Moore strong while addressing Chamber

    MOORE — Moore’s City Manager Steve Eddy could have quoted Dickens: “It was the best of times, it was the worst of times.” Eddy, with help from Mayor Glenn Lewis, reported on Tuesday on the State of the City to the Moore Chamber of ...

    July 23, 2014

  • walmart City leaders say ‘yes’ to Wal-Mart supercenter postponement

    Despite complaints that a postponement request was in the eleventh hour, a zoning change in east Norman was put on hold Tuesday night. The proposal to rezone property at Cedar Lane Road between 24th Avenue Southeast and Highway 77 ...

    July 23, 2014 1 Photo

  • Moore City Council paves way for Sam’s Club location

    MOORE — The Moore City Council approved a $5 million bond Tuesday to be repaid with sales tax and utility revenues. “A good amount of street improvements needs to be done,” Moore City Manager Steve Eddy said. “This will be paid for with ...

    July 22, 2014

  • Another brick in the Wal-Mart

    Norman could soon have five Wal-Mart stores, including three supercenters and two neighborhood markets. A proposal for the newest supercenter will come before the Norman City Council at 6:30 p.m. Tuesday via a request for a zoning change on ...

    July 20, 2014

  • Local group celebrates ruling

    A local group, Mothers of Many, expressed its elation with Friday’s 10th Circuit Court ruling striking down Oklahoma’s state ban on same-sex marriage....

    July 20, 2014