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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 46–60 of 92 samples in this date range, newest first.

Routine (15).

Coliform and microbial sample results for City of Houston, 46 to 60 of 92 samples shown, newest first. A result is a presence-or-absence verdict and carries no measured amount.
Result Organism
Collected
Sep 8, 2025 10:18
Sampling point
TC0003 Outside Faucet
Sample type
Routine
Lab sample
BACT-240206-10175
Laboratory
MSDH Lab
Monitoring period
Sep 1, 2025 – Sep 30, 2025
Absence , sample collected Sep 8, 2025 10:18, sampling point TC0003 Coliform (TCR)
Absence , sample collected Sep 8, 2025 10:18, sampling point TC0003 E. Coli
Collected
Sep 8, 2025 11:09
Sampling point
TC0009 Outside Faucet
Sample type
Routine
Lab sample
BACT-240206-10177
Laboratory
MSDH Lab
Monitoring period
Sep 1, 2025 – Sep 30, 2025
Absence , sample collected Sep 8, 2025 11:09, sampling point TC0009 Coliform (TCR)
Absence , sample collected Sep 8, 2025 11:09, sampling point TC0009 E. Coli
Collected
Sep 8, 2025 10:35
Sampling point
TC0010 Outside Faucet
Sample type
Routine
Lab sample
BACT-240206-10176
Laboratory
MSDH Lab
Monitoring period
Sep 1, 2025 – Sep 30, 2025
Absence , sample collected Sep 8, 2025 10:35, sampling point TC0010 Coliform (TCR)
Absence , sample collected Sep 8, 2025 10:35, sampling point TC0010 E. Coli
Collected
Aug 5, 2025 11:19
Sampling point
TC0002 Outside Faucet
Sample type
Routine
Lab sample
BACT-240206-10174
Laboratory
MSDH Lab
Monitoring period
Aug 1, 2025 – Aug 31, 2025
Absence , sample collected Aug 5, 2025 11:19, sampling point TC0002 Coliform (TCR)
Absence , sample collected Aug 5, 2025 11:19, sampling point TC0002 E. Coli
Collected
Aug 5, 2025 10:42
Sampling point
TC0003 Outside Faucet
Sample type
Routine
Lab sample
BACT-240206-10172
Laboratory
MSDH Lab
Monitoring period
Aug 1, 2025 – Aug 31, 2025
Absence , sample collected Aug 5, 2025 10:42, sampling point TC0003 Coliform (TCR)
Absence , sample collected Aug 5, 2025 10:42, sampling point TC0003 E. Coli
Collected
Aug 5, 2025 11:04
Sampling point
TC0009 Outside Faucet
Sample type
Routine
Lab sample
BACT-240206-10173
Laboratory
MSDH Lab
Monitoring period
Aug 1, 2025 – Aug 31, 2025
Absence , sample collected Aug 5, 2025 11:04, sampling point TC0009 Coliform (TCR)
Absence , sample collected Aug 5, 2025 11:04, sampling point TC0009 E. Coli
Collected
Aug 5, 2025 10:18
Sampling point
TC0010 Outside Faucet
Sample type
Routine
Lab sample
BACT-240206-10171
Laboratory
MSDH Lab
Monitoring period
Aug 1, 2025 – Aug 31, 2025
Absence , sample collected Aug 5, 2025 10:18, sampling point TC0010 Coliform (TCR)
Absence , sample collected Aug 5, 2025 10:18, sampling point TC0010 E. Coli
Collected
Jul 7, 2025 10:11
Sampling point
TC0002 Outside Faucet
Sample type
Routine
Lab sample
BACT-240206-10167
Laboratory
MSDH Lab
Monitoring period
Jul 1, 2025 – Jul 31, 2025
Absence , sample collected Jul 7, 2025 10:11, sampling point TC0002 Coliform (TCR)
Absence , sample collected Jul 7, 2025 10:11, sampling point TC0002 E. Coli
Collected
Jul 7, 2025 11:09
Sampling point
TC0003 Outside Faucet
Sample type
Routine
Lab sample
BACT-240206-10170
Laboratory
MSDH Lab
Monitoring period
Jul 1, 2025 – Jul 31, 2025
Absence , sample collected Jul 7, 2025 11:09, sampling point TC0003 Coliform (TCR)
Absence , sample collected Jul 7, 2025 11:09, sampling point TC0003 E. Coli
Collected
Jul 7, 2025 10:32
Sampling point
TC0009 Outside Faucet
Sample type
Routine
Lab sample
BACT-240206-10168
Laboratory
MSDH Lab
Monitoring period
Jul 1, 2025 – Jul 31, 2025
Absence , sample collected Jul 7, 2025 10:32, sampling point TC0009 Coliform (TCR)
Absence , sample collected Jul 7, 2025 10:32, sampling point TC0009 E. Coli
Collected
Jul 7, 2025 10:58
Sampling point
TC0010 Outside Faucet
Sample type
Routine
Lab sample
BACT-240206-10169
Laboratory
MSDH Lab
Monitoring period
Jul 1, 2025 – Jul 31, 2025
Absence , sample collected Jul 7, 2025 10:58, sampling point TC0010 Coliform (TCR)
Absence , sample collected Jul 7, 2025 10:58, sampling point TC0010 E. Coli
Collected
Jun 9, 2025 10:30
Sampling point
TC0002 Outside Faucet
Sample type
Routine
Lab sample
BACT-240206-10163
Laboratory
MSDH Lab
Monitoring period
Jun 1, 2025 – Jun 30, 2025
Absence , sample collected Jun 9, 2025 10:30, sampling point TC0002 Coliform (TCR)
Absence , sample collected Jun 9, 2025 10:30, sampling point TC0002 E. Coli
Collected
Jun 9, 2025 11:21
Sampling point
TC0003 Outside Faucet
Sample type
Routine
Lab sample
BACT-240206-10166
Laboratory
MSDH Lab
Monitoring period
Jun 1, 2025 – Jun 30, 2025
Absence , sample collected Jun 9, 2025 11:21, sampling point TC0003 Coliform (TCR)
Absence , sample collected Jun 9, 2025 11:21, sampling point TC0003 E. Coli
Collected
Jun 9, 2025 10:44
Sampling point
TC0009 Outside Faucet
Sample type
Routine
Lab sample
BACT-240206-10164
Laboratory
MSDH Lab
Monitoring period
Jun 1, 2025 – Jun 30, 2025
Absence , sample collected Jun 9, 2025 10:44, sampling point TC0009 Coliform (TCR)
Absence , sample collected Jun 9, 2025 10:44, sampling point TC0009 E. Coli
Collected
Jun 9, 2025 11:01
Sampling point
TC0010 Outside Faucet
Sample type
Routine
Lab sample
BACT-240206-10165
Laboratory
MSDH Lab
Monitoring period
Jun 1, 2025 – Jun 30, 2025
Absence , sample collected Jun 9, 2025 11:01, sampling point TC0010 Coliform (TCR)
Absence , sample collected Jun 9, 2025 11:01, sampling point TC0010 E. Coli