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This is a rebuild of Drinking Water Watch and not yet the official record. Use the agency’s current Drinking Water Watch for anything you need to rely on.

Coliform and microbial samples

MS0450010 , City of Madison

10 of 5,233 results on record were positive for coliform or another organism the agency tests for. The most recent was April 5, 2021.

They fall across 10 of the 3,897 samples on record.

Every sample on record, October 13, 2003 to August 4, 2026. These figures cover the whole record; the list of samples further down is narrowed.

This system’s violations

The most recent samples

Showing samples collected between September 27, 2024 and September 27, 2026. That is this page’s default, not a limit on what the agency records.

Show every sample on record

Choose a date range

The list below shows 211–225 of 346 samples in this date range, newest first.

Routine (15).

Coliform and microbial sample results for City of Madison, 211 to 225 of 346 samples shown, newest first. A result is a presence-or-absence verdict and carries no measured amount.
Result Organism
Collected
Jul 8, 2025 12:30
Sampling point
TC0028 Outside Faucet
Sample type
Routine
Lab sample
BACT-241001-41103
Laboratory
MSDH Lab
Monitoring period
Jul 1, 2025 – Jul 31, 2025
Absence , sample collected Jul 8, 2025 12:30, sampling point TC0028 Coliform (TCR)
Absence , sample collected Jul 8, 2025 12:30, sampling point TC0028 E. Coli
Collected
Jun 9, 2025 12:45
Sampling point
TC0005 Outside Faucet
Sample type
Routine
Lab sample
BACT-240529-24168
Laboratory
MSDH Lab
Monitoring period
Jun 1, 2025 – Jun 30, 2025
Absence , sample collected Jun 9, 2025 12:45, sampling point TC0005 Coliform (TCR)
Absence , sample collected Jun 9, 2025 12:45, sampling point TC0005 E. Coli
Collected
Jun 9, 2025 13:20
Sampling point
TC0007 Outside Faucet
Sample type
Routine
Lab sample
BACT-240529-24166
Laboratory
MSDH Lab
Monitoring period
Jun 1, 2025 – Jun 30, 2025
Absence , sample collected Jun 9, 2025 13:20, sampling point TC0007 Coliform (TCR)
Absence , sample collected Jun 9, 2025 13:20, sampling point TC0007 E. Coli
Collected
Jun 9, 2025 13:00
Sampling point
TC0008 Outside Faucet
Sample type
Routine
Lab sample
BACT-240529-24167
Laboratory
MSDH Lab
Monitoring period
Jun 1, 2025 – Jun 30, 2025
Absence , sample collected Jun 9, 2025 13:00, sampling point TC0008 Coliform (TCR)
Absence , sample collected Jun 9, 2025 13:00, sampling point TC0008 E. Coli
Collected
Jun 9, 2025 11:50
Sampling point
TC0013 Outside Faucet
Sample type
Routine
Lab sample
BACT-240529-24171
Laboratory
MSDH Lab
Monitoring period
Jun 1, 2025 – Jun 30, 2025
Absence , sample collected Jun 9, 2025 11:50, sampling point TC0013 Coliform (TCR)
Absence , sample collected Jun 9, 2025 11:50, sampling point TC0013 E. Coli
Collected
Jun 9, 2025 12:15
Sampling point
TC0026 Outside Faucet
Sample type
Routine
Lab sample
BACT-240529-24170
Laboratory
MSDH Lab
Monitoring period
Jun 1, 2025 – Jun 30, 2025
Absence , sample collected Jun 9, 2025 12:15, sampling point TC0026 Coliform (TCR)
Absence , sample collected Jun 9, 2025 12:15, sampling point TC0026 E. Coli
Collected
Jun 9, 2025 12:25
Sampling point
TC0027 Outside Faucet
Sample type
Routine
Lab sample
BACT-240529-24169
Laboratory
MSDH Lab
Monitoring period
Jun 1, 2025 – Jun 30, 2025
Absence , sample collected Jun 9, 2025 12:25, sampling point TC0027 Coliform (TCR)
Absence , sample collected Jun 9, 2025 12:25, sampling point TC0027 E. Coli
Collected
Jun 4, 2025 09:35
Sampling point
TC0001 Outside Faucet
Sample type
Routine
Lab sample
BACT-240529-24184
Laboratory
MSDH Lab
Monitoring period
Jun 1, 2025 – Jun 30, 2025
Absence , sample collected Jun 4, 2025 09:35, sampling point TC0001 Coliform (TCR)
Absence , sample collected Jun 4, 2025 09:35, sampling point TC0001 E. Coli
Collected
Jun 4, 2025 09:10
Sampling point
TC0003 Outside Faucet
Sample type
Routine
Lab sample
BACT-240529-24185
Laboratory
MSDH Lab
Monitoring period
Jun 1, 2025 – Jun 30, 2025
Absence , sample collected Jun 4, 2025 09:10, sampling point TC0003 Coliform (TCR)
Absence , sample collected Jun 4, 2025 09:10, sampling point TC0003 E. Coli
Collected
Jun 4, 2025 07:20
Sampling point
TC0010 Outside Faucet
Sample type
Routine
Lab sample
BACT-240529-24190
Laboratory
MSDH Lab
Monitoring period
Jun 1, 2025 – Jun 30, 2025
Absence , sample collected Jun 4, 2025 07:20, sampling point TC0010 Coliform (TCR)
Absence , sample collected Jun 4, 2025 07:20, sampling point TC0010 E. Coli
Collected
Jun 4, 2025 08:15
Sampling point
TC0012 Outside Faucet
Sample type
Routine
Lab sample
BACT-240529-24188
Laboratory
MSDH Lab
Monitoring period
Jun 1, 2025 – Jun 30, 2025
Absence , sample collected Jun 4, 2025 08:15, sampling point TC0012 Coliform (TCR)
Absence , sample collected Jun 4, 2025 08:15, sampling point TC0012 E. Coli
Collected
Jun 4, 2025 08:55
Sampling point
TC0014 Outside Faucet
Sample type
Routine
Lab sample
BACT-240529-24186
Laboratory
MSDH Lab
Monitoring period
Jun 1, 2025 – Jun 30, 2025
Absence , sample collected Jun 4, 2025 08:55, sampling point TC0014 Coliform (TCR)
Absence , sample collected Jun 4, 2025 08:55, sampling point TC0014 E. Coli
Collected
Jun 4, 2025 10:55
Sampling point
TC0015 Outside Faucet
Sample type
Routine
Lab sample
BACT-240529-24182
Laboratory
MSDH Lab
Monitoring period
Jun 1, 2025 – Jun 30, 2025
Absence , sample collected Jun 4, 2025 10:55, sampling point TC0015 Coliform (TCR)
Absence , sample collected Jun 4, 2025 10:55, sampling point TC0015 E. Coli
Collected
Jun 4, 2025 10:10
Sampling point
TC0016 Outside Faucet
Sample type
Routine
Lab sample
BACT-240529-24183
Laboratory
MSDH Lab
Monitoring period
Jun 1, 2025 – Jun 30, 2025
Absence , sample collected Jun 4, 2025 10:10, sampling point TC0016 Coliform (TCR)
Absence , sample collected Jun 4, 2025 10:10, sampling point TC0016 E. Coli
Collected
Jun 4, 2025 08:40
Sampling point
TC0020 Outside Faucet
Sample type
Routine
Lab sample
BACT-240529-24187
Laboratory
MSDH Lab
Monitoring period
Jun 1, 2025 – Jun 30, 2025
Absence , sample collected Jun 4, 2025 08:40, sampling point TC0020 Coliform (TCR)
Absence , sample collected Jun 4, 2025 08:40, sampling point TC0020 E. Coli