Permittee: Bomaz Farms, 426 165 Street, Hammond, WI, 54015

Facility Where Discharge Occurs: Bomaz Farms, 426 165th Street Hammond

Receiving Water and Location: Surface water and groundwater within the Parker Creek and Kinnickinni River Watersheds

Brief Facility Description : Bomaz Farms is an existing Concentrated Animal Feeding Operation (CAFO) dairy farm in St. Croix County, within the township of Pleasant Valley.  Bomaz Farms is owned and operated by Bob (Kay) Zwald, Tom (Ashley) Zwald, and Annette (Steve) Schalla of the Zwald Family.  

Bomaz Farms consists of two sites: Main Dairy Farm and Heifer Farm. The Main Dairy Farm includes three freestall barns; rotary milking parlor; feed storage pad; three waste storage facilities; composting pad; and sand settling lane. The Heifer Farm consists of multiple heifer sheds; two outdoor concrete feed lots; calf hutch area; and Slurry Store used to store runoff from outdoor lots. 

Bomaz Farms is operating at 1,745 animal units (AUs) including milking cows, dry cows, heifers, and calves.  On April 17, 2015 DNR approved Bomaz Farms’ five-year NMP for 2,320 AUs which included 2,320 acres available for land application of manure and process wastewater.  On March 17, 2021 DNR approved the NMP for Bomaz Farms which included the proposal to expand to 2,905 AUs and included 3,099.8 acres available for land application of manure and process wastewater. 

The Department has tentatively decided that the above specified WPDES permit should be reissued.

Permit Drafter’s Name, Address, Phone and Email: Jeffrey Jackson, DNR, 890 Spruce St, Baldwin, WI, 54002, (715)210.1415,

Persons wishing to comment on or object to the proposed permit action, the terms of the nutrient management plan, or the application, or to request a public informational hearing may write to the Department of Natural Resources at the permit drafter’s address.  All comments or suggestions received no later than 30 days after the publication date of this public notice will be considered along with other information on file in making a final decision regarding the permit.  Anyone providing comments in response to this public notice will receive a notification of the Department’s final decision when the permit is re-issued. Where designated as a reviewable surface water discharge permit, the U.S. Environmental Protection Agency is allowed up to 90 days to submit comments or objections regarding this permit determination. If no comments are received on the proposed permit from anyone, including U.S. EPA, the permit will be re-issued as proposed.

The Department may schedule a public informational hearing if within 30 days of the public date of this notice, a request for a hearing is filed by any person.  The Department shall schedule a public informational hearing if a petition requesting a hearing is received from USEPA or from 5 or more persons or if the Department determines there is significant public interest.  Requests for a public informational hearing shall state the following: the name and address of the person(s) requesting the hearing; the interest in the proposed permit of the person(s) requesting the hearing; the reasons for the request; and the issues proposed to be considered at the hearing.

Information on file for this permit action, including the draft permit and fact sheet (if required), the operation’s nutrient management plan and application may be inspected and copied at the permit drafter’s office, Monday through Friday (except holidays), between 9:00 a.m. and 3:30 p.m.  Please call the permit drafter for directions to their office location, if necessary.  Information on this permit action may also be obtained by calling the permit drafter at (715) 684-2914 or by writing to the Department.  Reasonable costs (15 cents per page for copies and 7 cents per page for scanning) will be charged for information in the file other than the public notice and fact sheet. Permit information  is also available on the internet at: Pursuant to the Americans with Disabilities Act, reasonable accommodation, including the provision of informational material in an alternative format, will be made to qualified individuals upon request.


(Apr. 21)

(0) comments

Welcome to the discussion.

Keep it Clean. Please avoid obscene, vulgar, lewd, racist or sexually-oriented language.
Don't Threaten. Threats of harming another person will not be tolerated.
Be Truthful. Don't knowingly lie about anyone or anything.
Be Nice. No racism, sexism or any sort of -ism that is degrading to another person.
Be Proactive. Use the 'Report' link on each comment to let us know of abusive posts.
Share with Us. We'd love to hear eyewitness accounts, the history behind an article.