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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

MS0500008 , City of Philadelphia

25 of the 60 analytes this system has been tested for have been detected at least once, across 255 samples on record.

The other 35 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 255 samples on record, detections range from October 8, 2003 to November 17, 2025. 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 City of Philadelphia, 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 159 of 160 results Jun 15, 2004 Jun 27, 2025
Lead 1030 Inorganic Chemical 29 of 160 results Jun 15, 2004 Jun 24, 2025
TTHM 2950 Organic Chemical 16 of 19 results Jul 19, 2004 Aug 19, 2025
Chloroform 2941 Organic Chemical 11 of 14 results Aug 27, 2007 Aug 19, 2025
Bromodichloromethane 2943 Organic Chemical 11 of 14 results Aug 27, 2007 Aug 19, 2025
Dibromochloromethane 2944 Organic Chemical 11 of 14 results Aug 27, 2007 Aug 19, 2025
Barium 1010 Inorganic Chemical 10 of 10 results Oct 8, 2003 Mar 18, 2025
Fluoride 1025 Inorganic Chemical 9 of 10 results Oct 8, 2003 Oct 3, 2022
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 8 of 19 results Jun 14, 2010 Nov 12, 2024
Dichloroacetic Acid 2451 Organic Chemical 6 of 14 results Jul 11, 2016 Nov 17, 2025
Nickel 1036 Inorganic Chemical 6 of 10 results Mar 8, 2004 Mar 18, 2025
Gross Alpha, Incl. Radon & U 4002 Radionuclide 5 of 5 results Mar 14, 2012 Oct 9, 2012
Bromoform 2942 Organic Chemical 4 of 14 results Jun 10, 2024 Aug 19, 2025
Sodium 1052 Inorganic Chemical 3 of 3 results Sep 13, 2019 Feb 24, 2025
Chromium 1020 Inorganic Chemical 3 of 10 results Apr 4, 2005 May 7, 2019
Selenium 1045 Inorganic Chemical 2 of 10 results Apr 4, 2005 Apr 29, 2013
Gross Alpha, Excl. Radon & U 4000 Radionuclide 2 of 2 results Sep 17, 2009 Mar 5, 2010
Combined Radium (-226 & -228) 4010 Radionuclide 2 of 7 results Sep 17, 2009 Mar 5, 2010
Radium-226 4020 Radionuclide 2 of 7 results Sep 17, 2009 Mar 5, 2010
Radium-228 4030 Radionuclide 2 of 7 results Sep 17, 2009 Mar 5, 2010
Gross Beta Particle Activity 4100 Radionuclide 2 of 2 results Sep 17, 2009 Mar 5, 2010
Gross Alpha Particle Activity 4109 Radionuclide 2 of 2 results Sep 17, 2009 Mar 5, 2010
Nitrate 1040 Inorganic Chemical 2 of 22 results May 24, 2004 Jul 17, 2006
Sulfate 1055 Inorganic Chemical 2 of 2 results Oct 8, 2003 Mar 8, 2004
Arsenic 1005 Inorganic Chemical 1 of 10 results Apr 29, 2013 Apr 29, 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 101–110 of 255 samples, newest first — collected June 27, 2016 to March 13, 2017. The summary above covers all 255.

28 results from the 10 samples listed here: 14 detected, 14 not detected. Across the whole record it is 310 of 863. 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 City of Philadelphia, every result from 101 to 110 of 255 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
Mar 13, 2017 01:36
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
170314-027NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 13, 2017 01:36, sampling point TF080 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2017 – Dec 31, 2017
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 13, 2017 01:36, sampling point TF080 Nitrate 1040 EPA method QC10107041C Jan 1, 2017 – Dec 31, 2017
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 13, 2017 01:36, sampling point TF080 Nitrite 1041 EPA method QC10107041C Jan 1, 2017 – Dec 31, 2017
Collected
Jul 11, 2016 01:28
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
160712-003TH
Laboratory
MSDH Lab
3.53 ug/l , sample collected Jul 11, 2016 01:28, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 11, 2016 01:28, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
3.23 ug/l , sample collected Jul 11, 2016 01:28, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
1.97 ug/l , sample collected Jul 11, 2016 01:28, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
8.73 ug/l , sample collected Jul 11, 2016 01:28, sampling point MRT000 TTHM 2950 Jan 1, 2014 – Dec 31, 2016
Collected
Jul 11, 2016 01:24
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
160712-003HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Jul 11, 2016 01:24, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.002 mg/l , sample collected Jul 11, 2016 01:24, sampling point MRT000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 11, 2016 01:24, sampling point MRT000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 11, 2016 01:24, sampling point MRT000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 11, 2016 01:24, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.002 mg/l , sample collected Jul 11, 2016 01:24, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 Jan 1, 2014 – Dec 31, 2016
Collected
Jun 28, 2016
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
160629-017PB
Laboratory
MSDH Lab
0.0036 mg/l , sample collected Jun 28, 2016, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 28, 2016, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Collected
Jun 28, 2016 04:35
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
160629-016PB
Laboratory
MSDH Lab
0.0035 mg/l , sample collected Jun 28, 2016 04:35, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 28, 2016 04:35, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Collected
Jun 28, 2016 06:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
160629-005PB
Laboratory
MSDH Lab
0.0109 mg/l , sample collected Jun 28, 2016 06:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
0.0006 mg/l , sample collected Jun 28, 2016 06:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Collected
Jun 28, 2016 07:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
160629-004PB
Laboratory
MSDH Lab
0.0208 mg/l , sample collected Jun 28, 2016 07:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 28, 2016 07:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Collected
Jun 27, 2016 07:10
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
160629-020PB
Laboratory
MSDH Lab
0.0335 mg/l , sample collected Jun 27, 2016 07:10, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 27, 2016 07:10, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Collected
Jun 27, 2016 09:04
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
160629-019PB
Laboratory
MSDH Lab
0.0031 mg/l , sample collected Jun 27, 2016 09:04, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 27, 2016 09:04, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Collected
Jun 27, 2016 08:55
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
160629-018PB
Laboratory
MSDH Lab
0.0057 mg/l , sample collected Jun 27, 2016 08:55, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 27, 2016 08:55, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016

Routine (10).