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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

MS0400011 , Town of Walnut Grove

3 of 454 results on record were positive for coliform or another organism the agency tests for. The most recent was May 22, 2009.

They fall across 3 of the 365 samples on record.

Every sample on record, October 29, 2003 to July 27, 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 Town of Walnut Grove, 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 27, 2026 14:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
BACT-250224-9747
Laboratory
MSDH Lab
Monitoring period
Jul 1, 2026 – Jul 31, 2026
Absence , sample collected Jul 27, 2026 14:00, sampling point DS000 Coliform (TCR)
Absence , sample collected Jul 27, 2026 14:00, sampling point DS000 E. Coli
Collected
Jun 23, 2026 14:50
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
BACT-250224-9745
Laboratory
MSDH Lab
Monitoring period
Jun 1, 2026 – Jun 30, 2026
Absence , sample collected Jun 23, 2026 14:50, sampling point DS000 Coliform (TCR)
Absence , sample collected Jun 23, 2026 14:50, sampling point DS000 E. Coli
Collected
May 12, 2026 12:15
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
BACT-250224-9744
Laboratory
MSDH Lab
Monitoring period
May 1, 2026 – May 31, 2026
Absence , sample collected May 12, 2026 12:15, sampling point DS000 Coliform (TCR)
Absence , sample collected May 12, 2026 12:15, sampling point DS000 E. Coli
Collected
Apr 13, 2026 14:15
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
BACT-250224-9743
Laboratory
MSDH Lab
Monitoring period
Apr 1, 2026 – Apr 30, 2026
Absence , sample collected Apr 13, 2026 14:15, sampling point DS000 Coliform (TCR)
Absence , sample collected Apr 13, 2026 14:15, sampling point DS000 E. Coli
Collected
Mar 17, 2026 12:30
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
BACT-250224-9742
Laboratory
MSDH Lab
Monitoring period
Mar 1, 2026 – Mar 31, 2026
Absence , sample collected Mar 17, 2026 12:30, sampling point DS000 Coliform (TCR)
Absence , sample collected Mar 17, 2026 12:30, sampling point DS000 E. Coli
Collected
Feb 17, 2026 12:40
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
BACT-250224-9741
Laboratory
MSDH Lab
Monitoring period
Feb 1, 2026 – Feb 28, 2026
Absence , sample collected Feb 17, 2026 12:40, sampling point DS000 Coliform (TCR)
Absence , sample collected Feb 17, 2026 12:40, sampling point DS000 E. Coli
Collected
Jan 6, 2026 13:25
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
BACT-250224-9737
Laboratory
MSDH Lab
Monitoring period
Jan 1, 2026 – Jan 31, 2026
Absence , sample collected Jan 6, 2026 13:25, sampling point DS000 Coliform (TCR)
Absence , sample collected Jan 6, 2026 13:25, sampling point DS000 E. Coli
Collected
Dec 8, 2025 13:45
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
BACT-250224-9736
Laboratory
MSDH Lab
Monitoring period
Dec 1, 2025 – Dec 31, 2025
Absence , sample collected Dec 8, 2025 13:45, sampling point DS000 Coliform (TCR)
Absence , sample collected Dec 8, 2025 13:45, sampling point DS000 E. Coli
Collected
Nov 5, 2025 13:45
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
BACT-250224-9735
Laboratory
MSDH Lab
Monitoring period
Nov 1, 2025 – Nov 30, 2025
Absence , sample collected Nov 5, 2025 13:45, sampling point DS000 Coliform (TCR)
Absence , sample collected Nov 5, 2025 13:45, sampling point DS000 E. Coli
Collected
Oct 14, 2025 13:55
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
BACT-250224-9734
Laboratory
MSDH Lab
Monitoring period
Oct 1, 2025 – Oct 31, 2025
Absence , sample collected Oct 14, 2025 13:55, sampling point DS000 Coliform (TCR)
Absence , sample collected Oct 14, 2025 13:55, sampling point DS000 E. Coli
Collected
Sep 8, 2025 13:50
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
BACT-250224-9733
Laboratory
MSDH Lab
Monitoring period
Sep 1, 2025 – Sep 30, 2025
Absence , sample collected Sep 8, 2025 13:50, sampling point DS000 Coliform (TCR)
Absence , sample collected Sep 8, 2025 13:50, sampling point DS000 E. Coli
Collected
Aug 18, 2025 13:50
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
BACT-250224-9732
Laboratory
MSDH Lab
Monitoring period
Aug 1, 2025 – Aug 31, 2025
Absence , sample collected Aug 18, 2025 13:50, sampling point DS000 Coliform (TCR)
Absence , sample collected Aug 18, 2025 13:50, sampling point DS000 E. Coli
Collected
Jul 7, 2025 14:25
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
BACT-250224-9731
Laboratory
MSDH Lab
Monitoring period
Jul 1, 2025 – Jul 31, 2025
Absence , sample collected Jul 7, 2025 14:25, sampling point DS000 Coliform (TCR)
Absence , sample collected Jul 7, 2025 14:25, sampling point DS000 E. Coli
Collected
Jun 16, 2025 14:10
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
BACT-250224-9730
Laboratory
MSDH Lab
Monitoring period
Jun 1, 2025 – Jun 30, 2025
Absence , sample collected Jun 16, 2025 14:10, sampling point DS000 Coliform (TCR)
Absence , sample collected Jun 16, 2025 14:10, sampling point DS000 E. Coli
Collected
May 12, 2025 14:45
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
BACT-250224-9729
Laboratory
MSDH Lab
Monitoring period
May 1, 2025 – May 31, 2025
Absence , sample collected May 12, 2025 14:45, sampling point DS000 Coliform (TCR)
Absence , sample collected May 12, 2025 14:45, sampling point DS000 E. Coli