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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

MS0090005 , City of Houston

3 of 1,637 results on record were positive for coliform or another organism the agency tests for. The most recent was January 7, 2019.

They fall across 3 of the 1,276 samples on record.

Every sample on record, October 9, 2003 to August 3, 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 26, 2024 and September 26, 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 61–75 of 92 samples in this date range, newest first.

Routine (15).

Coliform and microbial sample results for City of Houston, 61 to 75 of 92 samples shown, newest first. A result is a presence-or-absence verdict and carries no measured amount.
Result Organism
Collected
May 6, 2025 10:31
Sampling point
TC0002 Outside Faucet
Sample type
Routine
Lab sample
BACT-240206-10240
Laboratory
MSDH Lab
Monitoring period
May 1, 2025 – May 31, 2025
Absence , sample collected May 6, 2025 10:31, sampling point TC0002 Coliform (TCR)
Absence , sample collected May 6, 2025 10:31, sampling point TC0002 E. Coli
Collected
May 6, 2025 11:18
Sampling point
TC0003 Outside Faucet
Sample type
Routine
Lab sample
BACT-240206-10162
Laboratory
MSDH Lab
Monitoring period
May 1, 2025 – May 31, 2025
Absence , sample collected May 6, 2025 11:18, sampling point TC0003 Coliform (TCR)
Absence , sample collected May 6, 2025 11:18, sampling point TC0003 E. Coli
Collected
May 6, 2025 10:18
Sampling point
TC0009 Outside Faucet
Sample type
Routine
Lab sample
BACT-240206-10201
Laboratory
MSDH Lab
Monitoring period
May 1, 2025 – May 31, 2025
Absence , sample collected May 6, 2025 10:18, sampling point TC0009 Coliform (TCR)
Absence , sample collected May 6, 2025 10:18, sampling point TC0009 E. Coli
Collected
May 6, 2025 10:58
Sampling point
TC0010 Outside Faucet
Sample type
Routine
Lab sample
BACT-240206-10241
Laboratory
MSDH Lab
Monitoring period
May 1, 2025 – May 31, 2025
Absence , sample collected May 6, 2025 10:58, sampling point TC0010 Coliform (TCR)
Absence , sample collected May 6, 2025 10:58, sampling point TC0010 E. Coli
Collected
Apr 1, 2025 11:33
Sampling point
TC0002 Outside Faucet
Sample type
Routine
Lab sample
BACT-240206-10239
Laboratory
MSDH Lab
Monitoring period
Apr 1, 2025 – Apr 30, 2025
Absence , sample collected Apr 1, 2025 11:33, sampling point TC0002 Coliform (TCR)
Absence , sample collected Apr 1, 2025 11:33, sampling point TC0002 E. Coli
Collected
Apr 1, 2025 10:40
Sampling point
TC0003 Outside Faucet
Sample type
Routine
Lab sample
BACT-240206-10237
Laboratory
MSDH Lab
Monitoring period
Apr 1, 2025 – Apr 30, 2025
Absence , sample collected Apr 1, 2025 10:40, sampling point TC0003 Coliform (TCR)
Absence , sample collected Apr 1, 2025 10:40, sampling point TC0003 E. Coli
Collected
Apr 1, 2025 11:06
Sampling point
TC0009 Outside Faucet
Sample type
Routine
Lab sample
BACT-240206-10238
Laboratory
MSDH Lab
Monitoring period
Apr 1, 2025 – Apr 30, 2025
Absence , sample collected Apr 1, 2025 11:06, sampling point TC0009 Coliform (TCR)
Absence , sample collected Apr 1, 2025 11:06, sampling point TC0009 E. Coli
Collected
Apr 1, 2025 10:22
Sampling point
TC0010 Outside Faucet
Sample type
Routine
Lab sample
BACT-240206-10236
Laboratory
MSDH Lab
Monitoring period
Apr 1, 2025 – Apr 30, 2025
Absence , sample collected Apr 1, 2025 10:22, sampling point TC0010 Coliform (TCR)
Absence , sample collected Apr 1, 2025 10:22, sampling point TC0010 E. Coli
Collected
Mar 3, 2025 10:25
Sampling point
TC0002 Outside Faucet
Sample type
Routine
Lab sample
BACT-240206-10232
Laboratory
MSDH Lab
Monitoring period
Mar 1, 2025 – Mar 31, 2025
Absence , sample collected Mar 3, 2025 10:25, sampling point TC0002 Coliform (TCR)
Absence , sample collected Mar 3, 2025 10:25, sampling point TC0002 E. Coli
Collected
Mar 3, 2025 11:11
Sampling point
TC0003 Outside Faucet
Sample type
Routine
Lab sample
BACT-240206-10234
Laboratory
MSDH Lab
Monitoring period
Mar 1, 2025 – Mar 31, 2025
Absence , sample collected Mar 3, 2025 11:11, sampling point TC0003 Coliform (TCR)
Absence , sample collected Mar 3, 2025 11:11, sampling point TC0003 E. Coli
Collected
Mar 3, 2025 10:43
Sampling point
TC0009 Outside Faucet
Sample type
Routine
Lab sample
BACT-240206-10233
Laboratory
MSDH Lab
Monitoring period
Mar 1, 2025 – Mar 31, 2025
Absence , sample collected Mar 3, 2025 10:43, sampling point TC0009 Coliform (TCR)
Absence , sample collected Mar 3, 2025 10:43, sampling point TC0009 E. Coli
Collected
Mar 3, 2025 11:42
Sampling point
TC0010 Outside Faucet
Sample type
Routine
Lab sample
BACT-240206-10235
Laboratory
MSDH Lab
Monitoring period
Mar 1, 2025 – Mar 31, 2025
Absence , sample collected Mar 3, 2025 11:42, sampling point TC0010 Coliform (TCR)
Absence , sample collected Mar 3, 2025 11:42, sampling point TC0010 E. Coli
Collected
Feb 3, 2025 10:10
Sampling point
TC0002 Outside Faucet
Sample type
Routine
Lab sample
BACT-240206-10197
Laboratory
MSDH Lab
Monitoring period
Feb 1, 2025 – Feb 28, 2025
Absence , sample collected Feb 3, 2025 10:10, sampling point TC0002 Coliform (TCR)
Absence , sample collected Feb 3, 2025 10:10, sampling point TC0002 E. Coli
Collected
Feb 3, 2025 11:30
Sampling point
TC0003 Outside Faucet
Sample type
Routine
Lab sample
BACT-240206-10200
Laboratory
MSDH Lab
Monitoring period
Feb 1, 2025 – Feb 28, 2025
Absence , sample collected Feb 3, 2025 11:30, sampling point TC0003 Coliform (TCR)
Absence , sample collected Feb 3, 2025 11:30, sampling point TC0003 E. Coli
Collected
Feb 3, 2025 10:39
Sampling point
TC0009 Outside Faucet
Sample type
Routine
Lab sample
BACT-240206-10198
Laboratory
MSDH Lab
Monitoring period
Feb 1, 2025 – Feb 28, 2025
Absence , sample collected Feb 3, 2025 10:39, sampling point TC0009 Coliform (TCR)
Absence , sample collected Feb 3, 2025 10:39, sampling point TC0009 E. Coli