DNR Groundwater Retrieval Network
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If you have any questions or comments regarding GRN or this website please email us at
DNRDGGRN@wisconsin.gov
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Wisconsin Department of Natural Resources
101 S. Webster Street PO Box 7921
Madison, WI 53707-7921
Call 1-888-936-7463 (TTY via relay: 711) from 7AM to 10PM
Email Customer Service:
CSWEB@wisconsin.gov
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