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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. 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 1–15 of 1,276 samples on record, newest first.

Routine (15).

Coliform and microbial sample results for City of Houston, 1 to 15 of 1,276 samples shown, newest first. A result is a presence-or-absence verdict and carries no measured amount.
Result Organism
Collected
Aug 3, 2026 11:45
Sampling point
TC0002 Outside Faucet
Sample type
Routine
Lab sample
BACT-250403-20359
Laboratory
MSDH Lab
Monitoring period
Aug 1, 2026 – Aug 31, 2026
Absence , sample collected Aug 3, 2026 11:45, sampling point TC0002 Coliform (TCR)
Absence , sample collected Aug 3, 2026 11:45, sampling point TC0002 E. Coli
Collected
Aug 3, 2026 11:00
Sampling point
TC0003 Outside Faucet
Sample type
Routine
Lab sample
BACT-250403-20357
Laboratory
MSDH Lab
Monitoring period
Aug 1, 2026 – Aug 31, 2026
Absence , sample collected Aug 3, 2026 11:00, sampling point TC0003 Coliform (TCR)
Absence , sample collected Aug 3, 2026 11:00, sampling point TC0003 E. Coli
Collected
Aug 3, 2026 11:18
Sampling point
TC0009 Outside Faucet
Sample type
Routine
Lab sample
BACT-250403-20358
Laboratory
MSDH Lab
Monitoring period
Aug 1, 2026 – Aug 31, 2026
Absence , sample collected Aug 3, 2026 11:18, sampling point TC0009 Coliform (TCR)
Absence , sample collected Aug 3, 2026 11:18, sampling point TC0009 E. Coli
Collected
Aug 3, 2026 10:41
Sampling point
TC0010 Outside Faucet
Sample type
Routine
Lab sample
BACT-250403-20356
Laboratory
MSDH Lab
Monitoring period
Aug 1, 2026 – Aug 31, 2026
Absence , sample collected Aug 3, 2026 10:41, sampling point TC0010 Coliform (TCR)
Absence , sample collected Aug 3, 2026 10:41, sampling point TC0010 E. Coli
Collected
Jul 6, 2026 12:00
Sampling point
TC0002 Outside Faucet
Sample type
Routine
Lab sample
BACT-250403-20352
Laboratory
MSDH Lab
Monitoring period
Jul 1, 2026 – Jul 31, 2026
Absence , sample collected Jul 6, 2026 12:00, sampling point TC0002 Coliform (TCR)
Absence , sample collected Jul 6, 2026 12:00, sampling point TC0002 E. Coli
Collected
Jul 6, 2026 12:55
Sampling point
TC0003 Outside Faucet
Sample type
Routine
Lab sample
BACT-250403-20355
Laboratory
MSDH Lab
Monitoring period
Jul 1, 2026 – Jul 31, 2026
Absence , sample collected Jul 6, 2026 12:55, sampling point TC0003 Coliform (TCR)
Absence , sample collected Jul 6, 2026 12:55, sampling point TC0003 E. Coli
Collected
Jul 6, 2026 12:19
Sampling point
TC0009 Outside Faucet
Sample type
Routine
Lab sample
BACT-250403-20353
Laboratory
MSDH Lab
Monitoring period
Jul 1, 2026 – Jul 31, 2026
Absence , sample collected Jul 6, 2026 12:19, sampling point TC0009 Coliform (TCR)
Absence , sample collected Jul 6, 2026 12:19, sampling point TC0009 E. Coli
Collected
Jul 6, 2026 12:34
Sampling point
TC0010 Outside Faucet
Sample type
Routine
Lab sample
BACT-250403-20354
Laboratory
MSDH Lab
Monitoring period
Jul 1, 2026 – Jul 31, 2026
Absence , sample collected Jul 6, 2026 12:34, sampling point TC0010 Coliform (TCR)
Absence , sample collected Jul 6, 2026 12:34, sampling point TC0010 E. Coli
Collected
Jun 8, 2026 10:30
Sampling point
TC0002 Outside Faucet
Sample type
Routine
Lab sample
BACT-250403-20386
Laboratory
MSDH Lab
Monitoring period
Jun 1, 2026 – Jun 30, 2026
Absence , sample collected Jun 8, 2026 10:30, sampling point TC0002 Coliform (TCR)
Absence , sample collected Jun 8, 2026 10:30, sampling point TC0002 E. Coli
Collected
Jun 8, 2026 11:21
Sampling point
TC0003 Outside Faucet
Sample type
Routine
Lab sample
BACT-250403-20351
Laboratory
MSDH Lab
Monitoring period
Jun 1, 2026 – Jun 30, 2026
Absence , sample collected Jun 8, 2026 11:21, sampling point TC0003 Coliform (TCR)
Absence , sample collected Jun 8, 2026 11:21, sampling point TC0003 E. Coli
Collected
Jun 8, 2026 10:50
Sampling point
TC0009 Outside Faucet
Sample type
Routine
Lab sample
BACT-250403-20347
Laboratory
MSDH Lab
Monitoring period
Jun 1, 2026 – Jun 30, 2026
Absence , sample collected Jun 8, 2026 10:50, sampling point TC0009 Coliform (TCR)
Absence , sample collected Jun 8, 2026 10:50, sampling point TC0009 E. Coli
Collected
Jun 8, 2026 11:10
Sampling point
TC0010 Outside Faucet
Sample type
Routine
Lab sample
BACT-250403-20348
Laboratory
MSDH Lab
Monitoring period
Jun 1, 2026 – Jun 30, 2026
Absence , sample collected Jun 8, 2026 11:10, sampling point TC0010 Coliform (TCR)
Absence , sample collected Jun 8, 2026 11:10, sampling point TC0010 E. Coli
Collected
May 4, 2026 10:50
Sampling point
TC0002 Outside Faucet
Sample type
Routine
Lab sample
BACT-250403-20382
Laboratory
MSDH Lab
Monitoring period
May 1, 2026 – May 31, 2026
Absence , sample collected May 4, 2026 10:50, sampling point TC0002 Coliform (TCR)
Absence , sample collected May 4, 2026 10:50, sampling point TC0002 E. Coli
Collected
May 4, 2026 11:50
Sampling point
TC0003 Outside Faucet
Sample type
Routine
Lab sample
BACT-250403-20385
Laboratory
MSDH Lab
Monitoring period
May 1, 2026 – May 31, 2026
Absence , sample collected May 4, 2026 11:50, sampling point TC0003 Coliform (TCR)
Absence , sample collected May 4, 2026 11:50, sampling point TC0003 E. Coli
Collected
May 4, 2026 11:03
Sampling point
TC0009 Outside Faucet
Sample type
Routine
Lab sample
BACT-250403-20383
Laboratory
MSDH Lab
Monitoring period
May 1, 2026 – May 31, 2026
Absence , sample collected May 4, 2026 11:03, sampling point TC0009 Coliform (TCR)
Absence , sample collected May 4, 2026 11:03, sampling point TC0009 E. Coli