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Why we regulate
Learn what types of wastewater discharges are regulated and how
Plan review
The DNR reviews plans for municipal and industrial wastewater treatment plant construction
Discharge permits
Wastewater discharges to surface or groundwaters
Contact information
For information contact:
Kari Fleming
Biomonitoring Coordinator
Environmental Toxicologist
(608) 267-7663

Additional sources of WET program information

USEPA WET Test Methods and toxicity information. Test methods designed specifically for measuring WET have been codified at 40 CFR part 136 [60 FR 53529; October 16, 1995]. Three USEPA WET Methods Manuals (2 freshwater, 1 marine) were incorporated by reference into 40 CFR part 136 in the 1995 rule. On November 19, 2002, EPA revised these methods and made available updated method manual editions. As regulations, use of these methods and adherence to the specific test procedures outlined in these documents is required when monitoring WET under the National Pollutant Discharge Elimination System (which is where Wisconsin's WPDES permit program originates from). The State of Wisconsin Aquatic Life Toxicity Testing Methods Manual is intended to comply with the requirements of 40 CFR part 136 and all permittees and laboratories must follow the requirements found in this document in order to submit tests for compliance with a WPDES permit and/or to maintain laboratory certification or registration. The following websites contain information related to USEPA and NELAC WET requirements and toxicity information:

  • USEPA WET Methods Manuals and WET Guidance Documents [exit DNR]
  • The AQUIRE (AQUatic toxicity Information REtrieval) database [exit DNR] was established as a "clearinghouse" for toxicity data in 1981 by the USEPA, Mid-Continent Ecology Division. Scientific papers published both nationally and internationally on the toxic effects of chemicals to aquatic organisms and plants are collected and reviewed for AQUIRE.
  • The National Environmental Laboratory Accreditation Conference (NELAC) is a voluntary association of State and Federal agencies with full opportunity for input from the private sector. NELAC's purpose is to establish and promote mutually acceptable performance standards for the operation of environmental laboratories. EPA's National Environmental Laboratory Accreditation Program (NELAP) provides support to NELAC and, once the standards are adopted by the States and Federal agencies, will oversee the accrediting authority programs. The NELAC Home Page [exit DNR] contains documents and files on the NELAC Constitution and Bylaws, all the current standards, as well as all proposed changes to these documents. Also included are a history of the Conference, minutes of recent meetings, announcements of upcoming conferences and meetings, related information, the NELAC directory, and an open forum for discussion of NELAC issues.
Last revised: Monday May 15 2017