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 05/18/2026 Attachment 1 05/18/2026 07:55:20 PM

If any of the following information has changed, please contact your DNR representative with any corrections:
JESSICA MINICH BLACK RIVER FALLS, WI 54615
Phone: (715) 797-5360 Email: JESSICA.MINICH@WISCONSIN.GOV

System Name: MOSINEE EAST SYSTEM PWS ID#: 73724805 Population: 1,046

Sampler: PAUL SEEFELDT Owner: Mosinee City Clerk

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 Bacteria21
COMPLETEJANUARY - MARCH1 RawColiform Bacteria11
COMPLETEJANUARY - MARCH2 RawColiform Bacteria11
COMPLETEJANUARY - MARCH6 RawColiform Bacteria11
COMPLETEJANUARY - MARCHEP 1Per/Poly-Fluoroalkyls (PFAS)16
COMPLETEJANUARY - MARCHEP 2Per/Poly-Fluoroalkyls (PFAS)16
COMPLETEJANUARY - MARCHEP 6Per/Poly-Fluoroalkyls (PFAS)16
JANUARY - SEPTEMBEREP 1Inorganics126
JANUARY - SEPTEMBEREP 2Inorganics126
JANUARY - SEPTEMBEREP 6Inorganics126
JANUARY - SEPTEMBEREP 1Radioactivity - Grab14
JANUARY - SEPTEMBEREP 2Radioactivity - Grab14
JANUARY - SEPTEMBEREP 6Radioactivity - Grab14
JANUARY - SEPTEMBEREP 6Synthetic Organics12
JANUARY - SEPTEMBEREP 1Volatile Organics121
JANUARY - SEPTEMBEREP 2Volatile Organics121
JANUARY - SEPTEMBEREP 6Volatile Organics121
COMPLETEFEBRUARYDistributionColiform Bacteria21
COMPLETEMARCHDistributionColiform Bacteria21
COMPLETEAPRILDistributionColiform Bacteria21
COMPLETEAPRIL - JUNE1 RawColiform Bacteria11
COMPLETEAPRIL - JUNE2 RawColiform Bacteria11
COMPLETEAPRIL - JUNE6 RawColiform Bacteria11
COMPLETEAPRIL - JUNEEP 1Per/Poly-Fluoroalkyls (PFAS)16
COMPLETEAPRIL - JUNEEP 2Per/Poly-Fluoroalkyls (PFAS)16
COMPLETEAPRIL - JUNEEP 6Per/Poly-Fluoroalkyls (PFAS)16
MAYDistributionColiform Bacteria21
JUNEDistributionColiform Bacteria21
JUNE - SEPTEMBERDistributionLead and copper102
JULYDistributionColiform Bacteria21
JULY - SEPTEMBER1 RawColiform Bacteria11
JULY - SEPTEMBER2 RawColiform Bacteria11
JULY - SEPTEMBER6 RawColiform Bacteria11
JULY - SEPTEMBERDistributionDisinfection Byproducts (TTHM, HAA5)111
JULY - SEPTEMBEREP 1Per/Poly-Fluoroalkyls (PFAS)16
JULY - SEPTEMBEREP 2Per/Poly-Fluoroalkyls (PFAS)16
JULY - SEPTEMBEREP 6Per/Poly-Fluoroalkyls (PFAS)16
AUGUSTDistributionColiform Bacteria21
SEPTEMBERDistributionColiform Bacteria21
OCTOBERDistributionColiform Bacteria21
OCTOBER - DECEMBER1 RawColiform Bacteria11
OCTOBER - DECEMBER2 RawColiform Bacteria11
OCTOBER - DECEMBER6 RawColiform Bacteria11
OCTOBER - DECEMBEREP 1Per/Poly-Fluoroalkyls (PFAS)16
OCTOBER - DECEMBEREP 2Per/Poly-Fluoroalkyls (PFAS)16
OCTOBER - DECEMBEREP 6Per/Poly-Fluoroalkyls (PFAS)16
NOVEMBERDistributionColiform Bacteria21
DECEMBERDistributionColiform Bacteria21
Waivers:
Asbestos (Inorganic Report Form)1Waiver issued - No sampling required during calendar year 2026
Asbestos (Inorganic Report Form)2Waiver issued - No sampling required during calendar year 2026
Asbestos (Inorganic Report Form)6Waiver issued - No sampling required during calendar year 2026
Benzo(A)Pyrene (Synthetic Form)1Waiver issued - No sampling required during calendar year 2026
Benzo(A)Pyrene (Synthetic Form)2Waiver issued - No sampling required during calendar year 2026
Benzo(A)Pyrene (Synthetic Form)6Waiver issued - No sampling required during calendar year 2026
Cyanide (Inorganic Report Form)1Waiver issued - No sampling required during calendar year 2026
Cyanide (Inorganic Report Form)2Waiver issued - No sampling required during calendar year 2026
Cyanide (Inorganic Report Form)6Waiver issued - No sampling required during calendar year 2026
Dioxin (Synthetic Report Form)1Waiver issued - No sampling required during calendar year 2026
Dioxin (Synthetic Report Form)2Waiver issued - No sampling required during calendar year 2026
Dioxin (Synthetic Report Form)6Waiver issued - No sampling required during calendar year 2026
EDB/DBCP (Synthetic Report Form)1Waiver issued - No sampling required during calendar year 2026
EDB/DBCP (Synthetic Report Form)2Waiver issued - No sampling required during calendar year 2026
EDB/DBCP (Synthetic Report Form)6Waiver issued - No sampling required during calendar year 2026
Industrial Chemicals (Synthetic Form)1Waiver issued - No sampling required during calendar year 2026
Industrial Chemicals (Synthetic Form)2Waiver issued - No sampling required during calendar year 2026
Synthetic Organics - Pop < 100001Waiver issued - No sampling required during calendar year 2026
Synthetic Organics - Pop < 100002Waiver issued - No sampling required during calendar year 2026
Synthetic Organics - Pop < 100006Waiver issued - No sampling required during calendar year 2026