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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

MS0010007 , Oakland Water Works

18 of 424 results on record were positive for coliform or another organism the agency tests for. The most recent was April 6, 2017.

They fall across 18 of the 343 samples on record.

Every sample on record, October 6, 2003 to July 6, 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 25, 2024 and September 25, 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 1–15 of 22 samples in this date range, newest first.

Routine (15).

Coliform and microbial sample results for Oakland Water Works, 1 to 15 of 22 samples shown, newest first. A result is a presence-or-absence verdict and carries no measured amount.
Result Organism
Collected
Jul 6, 2026
Sampling point
TC0001 Outside Faucet
Sample type
Routine
Lab sample
86476
Laboratory
Waypoint Analytical
Monitoring period
Jul 1, 2026 – Jul 31, 2026
Absence , sample collected Jul 6, 2026, sampling point TC0001 Coliform (TCR)
Absence , sample collected Jul 6, 2026, sampling point TC0001 E. Coli
Collected
Jun 3, 2026
Sampling point
TC0003 Outside Faucet
Sample type
Routine
Lab sample
83095
Laboratory
Waypoint Analytical
Monitoring period
Jun 1, 2026 – Jun 30, 2026
Absence , sample collected Jun 3, 2026, sampling point TC0003 Coliform (TCR)
Absence , sample collected Jun 3, 2026, sampling point TC0003 E. Coli
Collected
May 5, 2026
Sampling point
TC0001 Outside Faucet
Sample type
Routine
Lab sample
79976
Laboratory
Waypoint Analytical
Monitoring period
May 1, 2026 – May 31, 2026
Absence , sample collected May 5, 2026, sampling point TC0001 Coliform (TCR)
Absence , sample collected May 5, 2026, sampling point TC0001 E. Coli
Collected
Apr 8, 2026
Sampling point
TC0003 Outside Faucet
Sample type
Routine
Lab sample
77322
Laboratory
Waypoint Analytical
Monitoring period
Apr 1, 2026 – Apr 30, 2026
Absence , sample collected Apr 8, 2026, sampling point TC0003 Coliform (TCR)
Absence , sample collected Apr 8, 2026, sampling point TC0003 E. Coli
Collected
Mar 9, 2026
Sampling point
TC0003 Outside Faucet
Sample type
Routine
Lab sample
74045
Laboratory
Waypoint Analytical
Monitoring period
Mar 1, 2026 – Mar 31, 2026
Absence , sample collected Mar 9, 2026, sampling point TC0003 Coliform (TCR)
Collected
Feb 2, 2026 09:45
Sampling point
TC0005 Outside Faucet
Sample type
Routine
Lab sample
BACT-251205-64149
Laboratory
MSDH Lab
Monitoring period
Feb 1, 2026 – Feb 28, 2026
Absence , sample collected Feb 2, 2026 09:45, sampling point TC0005 Coliform (TCR)
Absence , sample collected Feb 2, 2026 09:45, sampling point TC0005 E. Coli
Collected
Jan 6, 2026 09:45
Sampling point
TC0003 Outside Faucet
Sample type
Routine
Lab sample
BACT-210922-38513
Laboratory
MSDH Lab
Monitoring period
Jan 1, 2026 – Jan 31, 2026
Absence , sample collected Jan 6, 2026 09:45, sampling point TC0003 Coliform (TCR)
Absence , sample collected Jan 6, 2026 09:45, sampling point TC0003 E. Coli
Collected
Dec 5, 2025 09:17
Sampling point
TC0001 Outside Faucet
Sample type
Routine
Lab sample
BACT-251205-64148
Laboratory
MSDH Lab
Monitoring period
Dec 1, 2025 – Dec 31, 2025
Absence , sample collected Dec 5, 2025 09:17, sampling point TC0001 Coliform (TCR)
Absence , sample collected Dec 5, 2025 09:17, sampling point TC0001 E. Coli
Collected
Nov 4, 2025 08:41
Sampling point
TC0003 Outside Faucet
Sample type
Routine
Lab sample
BACT-210922-38512
Laboratory
MSDH Lab
Monitoring period
Nov 1, 2025 – Nov 30, 2025
Absence , sample collected Nov 4, 2025 08:41, sampling point TC0003 Coliform (TCR)
Absence , sample collected Nov 4, 2025 08:41, sampling point TC0003 E. Coli
Collected
Oct 6, 2025 08:23
Sampling point
TC0003 Outside Faucet
Sample type
Routine
Lab sample
BACT-240618-26278
Laboratory
MSDH Lab
Monitoring period
Oct 1, 2025 – Oct 31, 2025
Absence , sample collected Oct 6, 2025 08:23, sampling point TC0003 Coliform (TCR)
Absence , sample collected Oct 6, 2025 08:23, sampling point TC0003 E. Coli
Collected
Sep 11, 2025 08:45
Sampling point
TC0003 Outside Faucet
Sample type
Routine
Lab sample
BACT-240618-26277
Laboratory
MSDH Lab
Monitoring period
Sep 1, 2025 – Sep 30, 2025
Absence , sample collected Sep 11, 2025 08:45, sampling point TC0003 Coliform (TCR)
Absence , sample collected Sep 11, 2025 08:45, sampling point TC0003 E. Coli
Collected
Aug 6, 2025 08:44
Sampling point
TC0001 Outside Faucet
Sample type
Routine
Lab sample
BACT-210922-38510
Laboratory
MSDH Lab
Monitoring period
Aug 1, 2025 – Aug 31, 2025
Absence , sample collected Aug 6, 2025 08:44, sampling point TC0001 Coliform (TCR)
Absence , sample collected Aug 6, 2025 08:44, sampling point TC0001 E. Coli
Collected
Jul 9, 2025 09:25
Sampling point
TC0001 Outside Faucet
Sample type
Routine
Lab sample
BACT-210922-38509
Laboratory
MSDH Lab
Monitoring period
Jul 1, 2025 – Jul 31, 2025
Absence , sample collected Jul 9, 2025 09:25, sampling point TC0001 Coliform (TCR)
Absence , sample collected Jul 9, 2025 09:25, sampling point TC0001 E. Coli
Collected
Jun 5, 2025 10:01
Sampling point
TC0003 Outside Faucet
Sample type
Routine
Lab sample
BACT-240618-26276
Laboratory
MSDH Lab
Monitoring period
Jun 1, 2025 – Jun 30, 2025
Absence , sample collected Jun 5, 2025 10:01, sampling point TC0003 Coliform (TCR)
Absence , sample collected Jun 5, 2025 10:01, sampling point TC0003 E. Coli
Collected
May 7, 2025 09:37
Sampling point
TC0003 Outside Faucet
Sample type
Routine
Lab sample
BACT-210922-38507
Laboratory
MSDH Lab
Monitoring period
May 1, 2025 – May 31, 2025
Absence , sample collected May 7, 2025 09:37, sampling point TC0003 Coliform (TCR)
Absence , sample collected May 7, 2025 09:37, sampling point TC0003 E. Coli