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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. No date range is applied.

This system’s violations

The most recent samples

No date range is applied: this list draws on every sample on record. Show the last two years only.

The list below shows 46–60 of 3,897 samples on record, newest first.

Routine (15).

Coliform and microbial sample results for City of Madison, 46 to 60 of 3,897 samples shown, newest first. A result is a presence-or-absence verdict and carries no measured amount.
Result Organism
Collected
May 5, 2026 09:44
Sampling point
TC0021 Outside Faucet
Sample type
Routine
Lab sample
BACT-260505-13752
Laboratory
MSDH Lab
Monitoring period
May 1, 2026 – May 31, 2026
Absence , sample collected May 5, 2026 09:44, sampling point TC0021 Coliform (TCR)
Absence , sample collected May 5, 2026 09:44, sampling point TC0021 E. Coli
Collected
May 5, 2026 10:06
Sampling point
TC0032 Ne End of BLDG Faucet
Sample type
Routine
Lab sample
BACT-260505-13751
Laboratory
MSDH Lab
Monitoring period
May 1, 2026 – May 31, 2026
Absence , sample collected May 5, 2026 10:06, sampling point TC0032 Coliform (TCR)
Absence , sample collected May 5, 2026 10:06, sampling point TC0032 E. Coli
Collected
May 5, 2026 09:54
Sampling point
TC0033 West End of BLDG Faucet
Sample type
Routine
Lab sample
BACT-240529-24319
Laboratory
MSDH Lab
Monitoring period
May 1, 2026 – May 31, 2026
Absence , sample collected May 5, 2026 09:54, sampling point TC0033 Coliform (TCR)
Absence , sample collected May 5, 2026 09:54, sampling point TC0033 E. Coli
Collected
May 4, 2026 09:15
Sampling point
TC0001 Outside Faucet
Sample type
Routine
Lab sample
BACT-250708-35979
Laboratory
MSDH Lab
Monitoring period
May 1, 2026 – May 31, 2026
Absence , sample collected May 4, 2026 09:15, sampling point TC0001 Coliform (TCR)
Absence , sample collected May 4, 2026 09:15, sampling point TC0001 E. Coli
Collected
May 4, 2026 09:55
Sampling point
TC0002 Outside Faucet
Sample type
Routine
Lab sample
BACT-250708-36016
Laboratory
MSDH Lab
Monitoring period
May 1, 2026 – May 31, 2026
Absence , sample collected May 4, 2026 09:55, sampling point TC0002 Coliform (TCR)
Absence , sample collected May 4, 2026 09:55, sampling point TC0002 E. Coli
Collected
May 4, 2026 09:40
Sampling point
TC0003 Outside Faucet
Sample type
Routine
Lab sample
BACT-250708-35978
Laboratory
MSDH Lab
Monitoring period
May 1, 2026 – May 31, 2026
Absence , sample collected May 4, 2026 09:40, sampling point TC0003 Coliform (TCR)
Absence , sample collected May 4, 2026 09:40, sampling point TC0003 E. Coli
Collected
May 4, 2026 11:25
Sampling point
TC0010 Outside Faucet
Sample type
Routine
Lab sample
BACT-250708-36011
Laboratory
MSDH Lab
Monitoring period
May 1, 2026 – May 31, 2026
Absence , sample collected May 4, 2026 11:25, sampling point TC0010 Coliform (TCR)
Absence , sample collected May 4, 2026 11:25, sampling point TC0010 E. Coli
Collected
May 4, 2026 10:45
Sampling point
TC0012 Outside Faucet
Sample type
Routine
Lab sample
BACT-250708-36014
Laboratory
MSDH Lab
Monitoring period
May 1, 2026 – May 31, 2026
Absence , sample collected May 4, 2026 10:45, sampling point TC0012 Coliform (TCR)
Absence , sample collected May 4, 2026 10:45, sampling point TC0012 E. Coli
Collected
May 4, 2026 10:10
Sampling point
TC0014 Outside Faucet
Sample type
Routine
Lab sample
BACT-250708-36015
Laboratory
MSDH Lab
Monitoring period
May 1, 2026 – May 31, 2026
Absence , sample collected May 4, 2026 10:10, sampling point TC0014 Coliform (TCR)
Absence , sample collected May 4, 2026 10:10, sampling point TC0014 E. Coli
Collected
May 4, 2026 08:15
Sampling point
TC0015 Outside Faucet
Sample type
Routine
Lab sample
BACT-250708-35982
Laboratory
MSDH Lab
Monitoring period
May 1, 2026 – May 31, 2026
Absence , sample collected May 4, 2026 08:15, sampling point TC0015 Coliform (TCR)
Absence , sample collected May 4, 2026 08:15, sampling point TC0015 E. Coli
Collected
May 4, 2026 08:55
Sampling point
TC0016 Outside Faucet
Sample type
Routine
Lab sample
BACT-250708-35981
Laboratory
MSDH Lab
Monitoring period
May 1, 2026 – May 31, 2026
Absence , sample collected May 4, 2026 08:55, sampling point TC0016 Coliform (TCR)
Absence , sample collected May 4, 2026 08:55, sampling point TC0016 E. Coli
Collected
May 4, 2026 10:00
Sampling point
TC0020 Outside Faucet
Sample type
Routine
Lab sample
BACT-250708-36017
Laboratory
MSDH Lab
Monitoring period
May 1, 2026 – May 31, 2026
Absence , sample collected May 4, 2026 10:00, sampling point TC0020 Coliform (TCR)
Absence , sample collected May 4, 2026 10:00, sampling point TC0020 E. Coli
Collected
May 4, 2026 10:55
Sampling point
TC0023 Outside Faucet
Sample type
Routine
Lab sample
BACT-250708-36013
Laboratory
MSDH Lab
Monitoring period
May 1, 2026 – May 31, 2026
Absence , sample collected May 4, 2026 10:55, sampling point TC0023 Coliform (TCR)
Absence , sample collected May 4, 2026 10:55, sampling point TC0023 E. Coli
Collected
May 4, 2026 09:05
Sampling point
TC0025 Outside Faucet
Sample type
Routine
Lab sample
BACT-250708-35980
Laboratory
MSDH Lab
Monitoring period
May 1, 2026 – May 31, 2026
Absence , sample collected May 4, 2026 09:05, sampling point TC0025 Coliform (TCR)
Absence , sample collected May 4, 2026 09:05, sampling point TC0025 E. Coli
Collected
May 4, 2026 11:15
Sampling point
TC0029 Outside Faucet
Sample type
Routine
Lab sample
BACT-250708-36012
Laboratory
MSDH Lab
Monitoring period
May 1, 2026 – May 31, 2026
Absence , sample collected May 4, 2026 11:15, sampling point TC0029 Coliform (TCR)
Absence , sample collected May 4, 2026 11:15, sampling point TC0029 E. Coli