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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

MS0310010 , Philadelphia Water Assn

2 of 736 results on record were positive for coliform or another organism the agency tests for. The most recent was April 19, 2016.

They fall across 2 of the 560 samples on record.

Every sample on record, November 12, 2003 to August 12, 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 46 samples in this date range, newest first.

Routine (15).

Coliform and microbial sample results for Philadelphia Water Assn, 1 to 15 of 46 samples shown, newest first. A result is a presence-or-absence verdict and carries no measured amount.
Result Organism
Collected
Aug 12, 2026 12:01
Sampling point
TC0001 Outside Faucet
Sample type
Routine
Lab sample
BACT-250801-39888
Laboratory
MSDH Lab
Monitoring period
Aug 1, 2026 – Aug 31, 2026
Absence , sample collected Aug 12, 2026 12:01, sampling point TC0001 Coliform (TCR)
Absence , sample collected Aug 12, 2026 12:01, sampling point TC0001 E. Coli
Collected
Aug 12, 2026 12:17
Sampling point
TC0007 Outside Faucet
Sample type
Routine
Lab sample
BACT-250801-39887
Laboratory
MSDH Lab
Monitoring period
Aug 1, 2026 – Aug 31, 2026
Absence , sample collected Aug 12, 2026 12:17, sampling point TC0007 Coliform (TCR)
Absence , sample collected Aug 12, 2026 12:17, sampling point TC0007 E. Coli
Collected
Jul 15, 2026 12:02
Sampling point
TC0001 Outside Faucet
Sample type
Routine
Lab sample
BACT-250801-39886
Laboratory
MSDH Lab
Monitoring period
Jul 1, 2026 – Jul 31, 2026
Absence , sample collected Jul 15, 2026 12:02, sampling point TC0001 Coliform (TCR)
Absence , sample collected Jul 15, 2026 12:02, sampling point TC0001 E. Coli
Collected
Jul 15, 2026 12:20
Sampling point
TC0007 Outside Faucet
Sample type
Routine
Lab sample
BACT-250801-39885
Laboratory
MSDH Lab
Monitoring period
Jul 1, 2026 – Jul 31, 2026
Absence , sample collected Jul 15, 2026 12:20, sampling point TC0007 Coliform (TCR)
Absence , sample collected Jul 15, 2026 12:20, sampling point TC0007 E. Coli
Collected
Jun 10, 2026 12:01
Sampling point
TC0001 Outside Faucet
Sample type
Routine
Lab sample
BACT-250801-39884
Laboratory
MSDH Lab
Monitoring period
Jun 1, 2026 – Jun 30, 2026
Absence , sample collected Jun 10, 2026 12:01, sampling point TC0001 Coliform (TCR)
Absence , sample collected Jun 10, 2026 12:01, sampling point TC0001 E. Coli
Collected
Jun 10, 2026 12:14
Sampling point
TC0007 Outside Faucet
Sample type
Routine
Lab sample
BACT-250801-39883
Laboratory
MSDH Lab
Monitoring period
Jun 1, 2026 – Jun 30, 2026
Absence , sample collected Jun 10, 2026 12:14, sampling point TC0007 Coliform (TCR)
Absence , sample collected Jun 10, 2026 12:14, sampling point TC0007 E. Coli
Collected
May 12, 2026 12:02
Sampling point
TC0001 Outside Faucet
Sample type
Routine
Lab sample
BACT-250801-39882
Laboratory
MSDH Lab
Monitoring period
May 1, 2026 – May 31, 2026
Absence , sample collected May 12, 2026 12:02, sampling point TC0001 Coliform (TCR)
Absence , sample collected May 12, 2026 12:02, sampling point TC0001 E. Coli
Collected
May 12, 2026 12:11
Sampling point
TC0007 Outside Faucet
Sample type
Routine
Lab sample
BACT-250801-39881
Laboratory
MSDH Lab
Monitoring period
May 1, 2026 – May 31, 2026
Absence , sample collected May 12, 2026 12:11, sampling point TC0007 Coliform (TCR)
Absence , sample collected May 12, 2026 12:11, sampling point TC0007 E. Coli
Collected
Apr 15, 2026 12:16
Sampling point
TC0001 Outside Faucet
Sample type
Routine
Lab sample
BACT-250801-39879
Laboratory
MSDH Lab
Monitoring period
Apr 1, 2026 – Apr 30, 2026
Absence , sample collected Apr 15, 2026 12:16, sampling point TC0001 Coliform (TCR)
Absence , sample collected Apr 15, 2026 12:16, sampling point TC0001 E. Coli
Collected
Apr 15, 2026 12:10
Sampling point
TC0007 Outside Faucet
Sample type
Routine
Lab sample
BACT-250801-39880
Laboratory
MSDH Lab
Monitoring period
Apr 1, 2026 – Apr 30, 2026
Absence , sample collected Apr 15, 2026 12:10, sampling point TC0007 Coliform (TCR)
Absence , sample collected Apr 15, 2026 12:10, sampling point TC0007 E. Coli
Collected
Mar 11, 2026 12:12
Sampling point
TC0001 Outside Faucet
Sample type
Routine
Lab sample
BACT-230908-33901
Laboratory
MSDH Lab
Monitoring period
Mar 1, 2026 – Mar 31, 2026
Absence , sample collected Mar 11, 2026 12:12, sampling point TC0001 Coliform (TCR)
Absence , sample collected Mar 11, 2026 12:12, sampling point TC0001 E. Coli
Collected
Mar 11, 2026 12:00
Sampling point
TC0007 Outside Faucet
Sample type
Routine
Lab sample
BACT-250801-39878
Laboratory
MSDH Lab
Monitoring period
Mar 1, 2026 – Mar 31, 2026
Absence , sample collected Mar 11, 2026 12:00, sampling point TC0007 Coliform (TCR)
Absence , sample collected Mar 11, 2026 12:00, sampling point TC0007 E. Coli
Collected
Feb 11, 2026 12:03
Sampling point
TC0001 Outside Faucet
Sample type
Routine
Lab sample
BACT-230908-33900
Laboratory
MSDH Lab
Monitoring period
Feb 1, 2026 – Feb 28, 2026
Absence , sample collected Feb 11, 2026 12:03, sampling point TC0001 Coliform (TCR)
Absence , sample collected Feb 11, 2026 12:03, sampling point TC0001 E. Coli
Collected
Feb 11, 2026 12:21
Sampling point
TC0007 Outside Faucet
Sample type
Routine
Lab sample
BACT-230908-33899
Laboratory
MSDH Lab
Monitoring period
Feb 1, 2026 – Feb 28, 2026
Absence , sample collected Feb 11, 2026 12:21, sampling point TC0007 Coliform (TCR)
Absence , sample collected Feb 11, 2026 12:21, sampling point TC0007 E. Coli
Collected
Jan 14, 2026 12:01
Sampling point
TC0001 Outside Faucet
Sample type
Routine
Lab sample
BACT-230908-33898
Laboratory
MSDH Lab
Monitoring period
Jan 1, 2026 – Jan 31, 2026
Absence , sample collected Jan 14, 2026 12:01, sampling point TC0001 Coliform (TCR)
Absence , sample collected Jan 14, 2026 12:01, sampling point TC0001 E. Coli