Wisconsin Department of Natural Resources Drinking Water System Routine Monitoring Requirements Period: 01/01/2026 to 12/31/2026 Subject to change -- based on information provided to DNR as of 06/12/2026 Attachment 1 06/12/2026 04:05:07 PM

If any of the following information has changed, please contact your DNR representative with any corrections:
WEBSTER, ARYN RHINELANDER, WI 54501
Phone: (715) 499-1160 Email: ARYN.WEBSTER@WISCONSIN.GOV

System Name: TOMAHAWK WATERWORKS PWS ID#: 73501274 Population: 3,180

Sampler: GLENN HANNA Owner: TOMAHAWK CITY CLERK- AMANDA L BARTZ

The following is a table of the routine monitoring required for this water system (additional monitoring may be required based on results of this monitoring). Each row represents a DNR monitoring requirement. Failure to complete a requirement may result in a monitoring violation. Please make sure that you are using the correct lab sheet for each sample, based on the correct time period, sample location and sample group.

Completed? Monitoring Period Sample Source Sample Group # of samples # of contams
COMPLETEJANUARYDistributionColiform Bacteria31
COMPLETEJANUARY - SEPTEMBEREP 4Inorganics126
COMPLETEJANUARY - SEPTEMBEREP 5Inorganics126
COMPLETEJANUARY - SEPTEMBEREP 4Radioactivity - Grab14
COMPLETEJANUARY - SEPTEMBEREP 5Radioactivity - Grab14
COMPLETEJANUARY - SEPTEMBEREP 4Volatile Organics121
COMPLETEJANUARY - SEPTEMBEREP 5Volatile Organics121
COMPLETEFEBRUARYDistributionColiform Bacteria31
COMPLETEMARCHDistributionColiform Bacteria31
COMPLETEMARCHEP 4Per/Poly-Fluoroalkyls (PFAS)16
COMPLETEMARCHEP 5Per/Poly-Fluoroalkyls (PFAS)16
COMPLETEAPRILDistributionColiform Bacteria31
COMPLETEMAYDistributionColiform Bacteria31
JUNEDistributionColiform Bacteria31
JUNE - SEPTEMBERDistributionLead and copper102
JULYDistributionColiform Bacteria31
AUGUSTDistributionColiform Bacteria31
SEPTEMBERDistributionColiform Bacteria31
SEPTEMBEREP 4Per/Poly-Fluoroalkyls (PFAS)16
SEPTEMBEREP 5Per/Poly-Fluoroalkyls (PFAS)16
OCTOBERDistributionColiform Bacteria31
NOVEMBERDistributionColiform Bacteria31
DECEMBERDistributionColiform Bacteria31
Waivers:
Benzo(A)Pyrene (Synthetic Form)4Waiver issued - No sampling required during calendar year 2026
Benzo(A)Pyrene (Synthetic Form)5Waiver issued - No sampling required during calendar year 2026
Cyanide (Inorganic Report Form)4Waiver issued - No sampling required during calendar year 2026
Cyanide (Inorganic Report Form)5Waiver issued - No sampling required during calendar year 2026
Dioxin (Synthetic Report Form)4Waiver issued - No sampling required during calendar year 2026
Dioxin (Synthetic Report Form)5Waiver issued - No sampling required during calendar year 2026
EDB/DBCP (Synthetic Report Form)4Waiver issued - No sampling required during calendar year 2026
EDB/DBCP (Synthetic Report Form)5Waiver issued - No sampling required during calendar year 2026
Industrial Chemicals (Synthetic Form)4Waiver issued - No sampling required during calendar year 2026
Industrial Chemicals (Synthetic Form)5Waiver issued - No sampling required during calendar year 2026
Synthetic Organics - Pop < 100004Waiver issued - No sampling required during calendar year 2026
Synthetic Organics - Pop < 100005Waiver issued - No sampling required during calendar year 2026