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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

MS0730010 , Lake Arrowhead

1 of 369 results on record was positive for coliform or another organism the agency tests for. The most recent was October 23, 2007.

They fall across 1 of the 282 samples on record.

Every sample on record, October 8, 2003 to July 14, 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 16–22 of 22 samples in this date range, newest first.

Routine (7).

Coliform and microbial sample results for Lake Arrowhead, 16 to 22 of 22 samples shown, newest first. A result is a presence-or-absence verdict and carries no measured amount.
Result Organism
Collected
Apr 2, 2025 11:35
Sampling point
TC0005 Outside Faucet
Sample type
Routine
Lab sample
BACT-220211-2833
Laboratory
MSDH Lab
Monitoring period
Apr 1, 2025 – Apr 30, 2025
Absence , sample collected Apr 2, 2025 11:35, sampling point TC0005 Coliform (TCR)
Absence , sample collected Apr 2, 2025 11:35, sampling point TC0005 E. Coli
Collected
Mar 4, 2025 09:10
Sampling point
TC0005 Outside Faucet
Sample type
Routine
Lab sample
BACT-220211-2839
Laboratory
MSDH Lab
Monitoring period
Mar 1, 2025 – Mar 31, 2025
Absence , sample collected Mar 4, 2025 09:10, sampling point TC0005 Coliform (TCR)
Absence , sample collected Mar 4, 2025 09:10, sampling point TC0005 E. Coli
Collected
Feb 5, 2025 11:30
Sampling point
TC0005 Outside Faucet
Sample type
Routine
Lab sample
BACT-220211-2832
Laboratory
MSDH Lab
Monitoring period
Feb 1, 2025 – Feb 28, 2025
Absence , sample collected Feb 5, 2025 11:30, sampling point TC0005 Coliform (TCR)
Absence , sample collected Feb 5, 2025 11:30, sampling point TC0005 E. Coli
Collected
Jan 8, 2025 10:58
Sampling point
TC0005 Outside Faucet
Sample type
Routine
Lab sample
BACT-220211-2831
Laboratory
MSDH Lab
Monitoring period
Jan 1, 2025 – Jan 31, 2025
Absence , sample collected Jan 8, 2025 10:58, sampling point TC0005 Coliform (TCR)
Absence , sample collected Jan 8, 2025 10:58, sampling point TC0005 E. Coli
Collected
Dec 4, 2024 11:10
Sampling point
TC0005 Outside Faucet
Sample type
Routine
Lab sample
BACT-220211-2830
Laboratory
MSDH Lab
Monitoring period
Dec 1, 2024 – Dec 31, 2024
Absence , sample collected Dec 4, 2024 11:10, sampling point TC0005 Coliform (TCR)
Absence , sample collected Dec 4, 2024 11:10, sampling point TC0005 E. Coli
Collected
Nov 6, 2024 10:45
Sampling point
TC0005 Outside Faucet
Sample type
Routine
Lab sample
BACT-210901-29013
Laboratory
MSDH Lab
Monitoring period
Nov 1, 2024 – Nov 30, 2024
Absence , sample collected Nov 6, 2024 10:45, sampling point TC0005 Coliform (TCR)
Absence , sample collected Nov 6, 2024 10:45, sampling point TC0005 E. Coli
Collected
Oct 15, 2024 11:20
Sampling point
TC0005 Outside Faucet
Sample type
Routine
Lab sample
BACT-220211-2829
Laboratory
MSDH Lab
Monitoring period
Oct 1, 2024 – Oct 31, 2024
Absence , sample collected Oct 15, 2024 11:20, sampling point TC0005 Coliform (TCR)
Absence , sample collected Oct 15, 2024 11:20, sampling point TC0005 E. Coli