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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.

Chemical and radiological sample results

MS0310010 , Philadelphia Water Assn

26 of the 53 analytes this system has been tested for have been detected at least once, across 432 samples on record.

The other 27 were tested for and never found. An analyte is counted here if any result on record measured it, so this covers the whole history and not the samples listed below.

Across all 432 samples on record, detections range from September 24, 2003 to July 30, 2026. These figures cover the whole record.

What counts as a non-detect is defined in the help: Less than Indicator. This system’s violations.

What has been detected, ever

Every analyte measured above its reporting level at any point in this system’s record, most often detected first. This is not limited to the samples listed below.

Every analyte ever detected for Philadelphia Water Assn, with how many results found it and when it was first and last detected. Covers the whole record, not only the samples listed below.
Analyte Kind Detected in First detected Last detected
Copper, Free 1022 Inorganic Chemical 77 of 77 results Jul 24, 2007 Jul 30, 2026
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 62 of 62 results Sep 15, 2004 Jun 25, 2026
TTHM 2950 Organic Chemical 61 of 61 results Sep 15, 2004 Nov 18, 2024
Lead 1030 Inorganic Chemical 51 of 77 results Jul 24, 2007 Jul 29, 2026
Dibromochloromethane 2944 Organic Chemical 47 of 47 results May 17, 2006 Nov 18, 2024
Chloroform 2941 Organic Chemical 46 of 47 results May 17, 2006 Nov 18, 2024
Bromoform 2942 Organic Chemical 46 of 47 results May 17, 2006 Nov 18, 2024
Bromodichloromethane 2943 Organic Chemical 46 of 47 results May 17, 2006 Nov 18, 2024
Dichloroacetic Acid 2451 Organic Chemical 43 of 43 results Sep 24, 2007 Jun 25, 2026
Trichloroacetic Acid 2452 Organic Chemical 43 of 43 results Sep 24, 2007 Jun 25, 2026
Dibromoacetic Acid 2454 Organic Chemical 41 of 43 results Sep 24, 2007 Jun 25, 2026
Barium 1010 Inorganic Chemical 30 of 30 results Sep 24, 2003 Feb 26, 2025
Fluoride 1025 Inorganic Chemical 30 of 30 results Sep 24, 2003 Feb 26, 2025
Chromium 1020 Inorganic Chemical 26 of 30 results Sep 24, 2003 May 16, 2022
Sodium 1052 Inorganic Chemical 9 of 9 results Sep 25, 2019 Feb 5, 2025
Xylenes, Total 2955 Organic Chemical 9 of 89 results Aug 26, 2013 Jul 31, 2017
Arsenic 1005 Inorganic Chemical 9 of 30 results Feb 23, 2004 Jan 14, 2009
Monochloroacetic Acid 2450 Organic Chemical 7 of 43 results Apr 30, 2008 Jul 16, 2013
Nickel 1036 Inorganic Chemical 7 of 30 results Mar 21, 2005 Apr 11, 2012
Sulfate 1055 Inorganic Chemical 6 of 6 results Sep 24, 2003 Feb 23, 2004
Monobromoacetic Acid 2453 Organic Chemical 5 of 43 results Aug 17, 2009 Nov 13, 2017
Selenium 1045 Inorganic Chemical 5 of 30 results Feb 23, 2004 Mar 21, 2005
Cyanide 1024 Inorganic Chemical 3 of 30 results Sep 14, 2009 Apr 2, 2012
Nitrate-Nitrite 1038 Inorganic Chemical 2 of 70 results May 1, 2007 Feb 21, 2023
Nitrate 1040 Inorganic Chemical 2 of 70 results May 1, 2007 Feb 21, 2023
Ethylbenzene 2992 Organic Chemical 1 of 89 results Aug 26, 2013 Aug 26, 2013

No date range is applied: this list draws on every sample on record. Show the last two years only.

The most recent samples, result by result

The table below lists 351–360 of 432 samples, newest first — collected July 24, 2007 to July 24, 2007. The summary above covers all 432.

20 results from the 10 samples listed here: 19 detected, 1 not detected. Across the whole record it is 714 of 3,149. A sample is analysed for many analytes at once, so one sample appears on as many rows as it had results.

Chemical and radiological sample results for Philadelphia Water Assn, every result from 351 to 360 of 432 samples shown, newest first. Not detected means the amount was below the level the laboratory can reliably report, which is given beside it.
Result Analyte Monitoring period
Collected
Jul 24, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070725-215PB
Laboratory
MSDH Lab
0.7361 mg/l , sample collected Jul 24, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
0.001 mg/l , sample collected Jul 24, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Collected
Jul 24, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070725-221PB
Laboratory
MSDH Lab
0.2742 mg/l , sample collected Jul 24, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
0.001 mg/l , sample collected Jul 24, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Collected
Jul 24, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070725-214PB
Laboratory
MSDH Lab
0.1966 mg/l , sample collected Jul 24, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
0.001 mg/l , sample collected Jul 24, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Collected
Jul 24, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070725-223PB
Laboratory
MSDH Lab
0.1434 mg/l , sample collected Jul 24, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 24, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Collected
Jul 24, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070725-213PB
Laboratory
MSDH Lab
0.3808 mg/l , sample collected Jul 24, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
0.0007 mg/l , sample collected Jul 24, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Collected
Jul 24, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070725-226PB
Laboratory
MSDH Lab
0.3988 mg/l , sample collected Jul 24, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
0.0006 mg/l , sample collected Jul 24, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Collected
Jul 24, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070725-227PB
Laboratory
MSDH Lab
0.7485 mg/l , sample collected Jul 24, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
0.001 mg/l , sample collected Jul 24, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Collected
Jul 24, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070725-224PB
Laboratory
MSDH Lab
0.414 mg/l , sample collected Jul 24, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
0.0012 mg/l , sample collected Jul 24, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Collected
Jul 24, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070725-225PB
Laboratory
MSDH Lab
1.0161 mg/l , sample collected Jul 24, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
0.0005 mg/l , sample collected Jul 24, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Collected
Jul 24, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070725-211PB
Laboratory
MSDH Lab
0.7801 mg/l , sample collected Jul 24, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
0.001 mg/l , sample collected Jul 24, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008

Routine (10).