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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 106–120 of 3,897 samples on record, newest first.

Routine (15).

Coliform and microbial sample results for City of Madison, 106 to 120 of 3,897 samples shown, newest first. A result is a presence-or-absence verdict and carries no measured amount.
Result Organism
Collected
Jan 8, 2026 12:03
Sampling point
TC0007 Outside Faucet
Sample type
Routine
Lab sample
BACT-240529-24308
Laboratory
MSDH Lab
Monitoring period
Jan 1, 2026 – Jan 31, 2026
Absence , sample collected Jan 8, 2026 12:03, sampling point TC0007 Coliform (TCR)
Absence , sample collected Jan 8, 2026 12:03, sampling point TC0007 E. Coli
Collected
Jan 8, 2026 13:16
Sampling point
TC0023 Outside Faucet
Sample type
Routine
Lab sample
BACT-240529-24307
Laboratory
MSDH Lab
Monitoring period
Jan 1, 2026 – Jan 31, 2026
Absence , sample collected Jan 8, 2026 13:16, sampling point TC0023 Coliform (TCR)
Absence , sample collected Jan 8, 2026 13:16, sampling point TC0023 E. Coli
Collected
Jan 8, 2026 11:50
Sampling point
TC0028 Outside Faucet
Sample type
Routine
Lab sample
BACT-240529-24309
Laboratory
MSDH Lab
Monitoring period
Jan 1, 2026 – Jan 31, 2026
Absence , sample collected Jan 8, 2026 11:50, sampling point TC0028 Coliform (TCR)
Absence , sample collected Jan 8, 2026 11:50, sampling point TC0028 E. Coli
Collected
Jan 8, 2026 13:38
Sampling point
TC0029 Outside Faucet
Sample type
Routine
Lab sample
BACT-240529-24310
Laboratory
MSDH Lab
Monitoring period
Jan 1, 2026 – Jan 31, 2026
Absence , sample collected Jan 8, 2026 13:38, sampling point TC0029 Coliform (TCR)
Absence , sample collected Jan 8, 2026 13:38, sampling point TC0029 E. Coli
Collected
Jan 7, 2026 09:20
Sampling point
TC0001 Outside Faucet
Sample type
Routine
Lab sample
BACT-250708-36058
Laboratory
MSDH Lab
Monitoring period
Jan 1, 2026 – Jan 31, 2026
Absence , sample collected Jan 7, 2026 09:20, sampling point TC0001 Coliform (TCR)
Absence , sample collected Jan 7, 2026 09:20, sampling point TC0001 E. Coli
Collected
Jan 7, 2026 09:30
Sampling point
TC0003 Outside Faucet
Sample type
Routine
Lab sample
BACT-250708-35977
Laboratory
MSDH Lab
Monitoring period
Jan 1, 2026 – Jan 31, 2026
Absence , sample collected Jan 7, 2026 09:30, sampling point TC0003 Coliform (TCR)
Absence , sample collected Jan 7, 2026 09:30, sampling point TC0003 E. Coli
Collected
Jan 7, 2026 10:55
Sampling point
TC0010 Outside Faucet
Sample type
Routine
Lab sample
BACT-250708-36066
Laboratory
MSDH Lab
Monitoring period
Jan 1, 2026 – Jan 31, 2026
Absence , sample collected Jan 7, 2026 10:55, sampling point TC0010 Coliform (TCR)
Absence , sample collected Jan 7, 2026 10:55, sampling point TC0010 E. Coli
Collected
Jan 7, 2026 10:20
Sampling point
TC0011 Outside Faucet
Sample type
Routine
Lab sample
BACT-250708-36067
Laboratory
MSDH Lab
Monitoring period
Jan 1, 2026 – Jan 31, 2026
Absence , sample collected Jan 7, 2026 10:20, sampling point TC0011 Coliform (TCR)
Absence , sample collected Jan 7, 2026 10:20, sampling point TC0011 E. Coli
Collected
Jan 7, 2026 10:15
Sampling point
TC0012 Outside Faucet
Sample type
Routine
Lab sample
BACT-250708-36065
Laboratory
MSDH Lab
Monitoring period
Jan 1, 2026 – Jan 31, 2026
Absence , sample collected Jan 7, 2026 10:15, sampling point TC0012 Coliform (TCR)
Absence , sample collected Jan 7, 2026 10:15, sampling point TC0012 E. Coli
Collected
Jan 7, 2026 10:05
Sampling point
TC0014 Outside Faucet
Sample type
Routine
Lab sample
BACT-250708-36063
Laboratory
MSDH Lab
Monitoring period
Jan 1, 2026 – Jan 31, 2026
Absence , sample collected Jan 7, 2026 10:05, sampling point TC0014 Coliform (TCR)
Absence , sample collected Jan 7, 2026 10:05, sampling point TC0014 E. Coli
Collected
Jan 7, 2026 08:10
Sampling point
TC0015 Outside Faucet
Sample type
Routine
Lab sample
BACT-250708-36059
Laboratory
MSDH Lab
Monitoring period
Jan 1, 2026 – Jan 31, 2026
Absence , sample collected Jan 7, 2026 08:10, sampling point TC0015 Coliform (TCR)
Absence , sample collected Jan 7, 2026 08:10, sampling point TC0015 E. Coli
Collected
Jan 7, 2026 08:30
Sampling point
TC0016 Outside Faucet
Sample type
Routine
Lab sample
BACT-250708-36062
Laboratory
MSDH Lab
Monitoring period
Jan 1, 2026 – Jan 31, 2026
Absence , sample collected Jan 7, 2026 08:30, sampling point TC0016 Coliform (TCR)
Absence , sample collected Jan 7, 2026 08:30, sampling point TC0016 E. Coli
Collected
Jan 7, 2026 09:55
Sampling point
TC0020 Outside Faucet
Sample type
Routine
Lab sample
BACT-250708-36060
Laboratory
MSDH Lab
Monitoring period
Jan 1, 2026 – Jan 31, 2026
Absence , sample collected Jan 7, 2026 09:55, sampling point TC0020 Coliform (TCR)
Absence , sample collected Jan 7, 2026 09:55, sampling point TC0020 E. Coli
Collected
Jan 7, 2026 09:40
Sampling point
TC0026 Outside Faucet
Sample type
Routine
Lab sample
BACT-250708-36061
Laboratory
MSDH Lab
Monitoring period
Jan 1, 2026 – Jan 31, 2026
Absence , sample collected Jan 7, 2026 09:40, sampling point TC0026 Coliform (TCR)
Absence , sample collected Jan 7, 2026 09:40, sampling point TC0026 E. Coli
Collected
Jan 7, 2026 09:45
Sampling point
TC0027 Outside Faucet
Sample type
Routine
Lab sample
BACT-250708-36064
Laboratory
MSDH Lab
Monitoring period
Jan 1, 2026 – Jan 31, 2026
Absence , sample collected Jan 7, 2026 09:45, sampling point TC0027 Coliform (TCR)
Absence , sample collected Jan 7, 2026 09:45, sampling point TC0027 E. Coli