Dear IOWATER volunteers and friends,
Below are two updates from the Iowa DNR Water Quality Standards section
that might be of interest to you:
Water Quality Standards Notice of Intended Action: Stream Use
Designation Revisions - Public Hearing Schedule
The Department will be revising Water Quality Standards to reflect
proposed designated use changes for select rivers and streams to protect
aquatic life and recreational uses. The complete Notice of Intended
Action can be found on the Department’s web site:
http://www.iowadnr.gov/epc/09feb17a.html. For a list of the stream
designations being revised in the water quality standards, please refer
to the list posted at the Department’s web site:
http://www.iowadnr.com/water/uaa.html.
Any person may submit written suggestions or comments on the proposed
amendment through April 30, 2009. Such written material should be
submitted to Adam Schnieders, Iowa Department of Natural Resources,
Wallace State Office Building, 502 East 9th Street, Des Moines, Iowa
50319; fax (515) 281-8895; or E-mail [log in to unmask] .
Persons who have questions may contact Adam Schnieders at (515) 281-7409.
Persons are invited to present oral or written comments at a series of
public hearings, which will be held throughout the state as follows:
· April 7, 2009; 1 p.m. - Wallace State Office Building, 4th Floor
Conference Rooms; 502 E. 9th St.; Des Moines, Iowa
· April 9, 2009; 10 a.m. - Cherokee Community Center; 530 W. Bluff
St.; Cherokee, Iowa
· April 9, 2009; 6 p.m. - Atlantic Municipal Utilities Conference
Room; 15 W. 3rd St.; Atlantic, Iowa
· April 14, 2009; 10 a.m. - Falcon Civic Center; 1305 5th Ave NE;
Independence, Iowa
· April 14, 2009; 6 p.m. - Iowa City Public Library; 123 Linn St.;
Iowa City, Iowa
· April 16, 2009; 1 p.m. - Clear Lake Community Meeting Room; 15
N. 6th St.; Clear Lake, IA
Revising Criteria for Chloride, Sulfate and Total Dissolved Solids
The Iowa Department of Natural Resources (DNR) is continuing to move
forward on revising Iowa’s water quality standards. The DNR is working
for improved water quality and safety in Iowa’s waters. Water Quality
Standards are the goals that we set for Iowa’s streams, rivers and lakes.
Water Quality Standards consist of three components:
Designate the use or uses of the waterbody (aquatic life and recreational
uses)
Set the criteria for protecting those uses
Protect and maintain existing water quality
Recently, the DNR began to compile all research related to toxicity of
total dissolved solids, chloride and sulfate. The purpose was to update
and develop criteria for these parameters to better protect aquatic life
based on new scientific information. The DNR worked with the U.S.
Environmental Protection Agency to ensure that the research compiled met
certain scientific standards. Gaps were identified in the previous
research which resulted in new toxicity tests being performed in 2008.
With the availability of new research and toxicity data, the information
is now available to propose numeric criteria for chloride and sulfate to
better protect river, stream and lake aquatic life uses and revaluate the
current interim approach for total dissolved solids criteria. The
Department is planning an Information item for the April Environmental
Protection Commission meeting. For more information see
http://www.iowadnr.gov/water/standards/chloride.html or contact Lori
McDaniel at 515.281.8094 or [log in to unmask]
Thank You,
IOWATER Staff
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