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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 151–160 of 255 samples, newest first — collected May 21, 2012 to July 22, 2013. The summary above covers all 255.

35 results from the 10 samples listed here: 10 detected, 25 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 151 to 160 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
Jul 22, 2013
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
130724-062PB
Laboratory
MSDH Lab
0.0017 mg/l , sample collected Jul 22, 2013, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 22, 2013, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Collected
Apr 29, 2013 01:51
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
130430-069IN
Laboratory
MSDH Lab
0.0008 mg/l , sample collected Apr 29, 2013 01:51, sampling point TF080 Arsenic 1005 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.0234 mg/l , sample collected Apr 29, 2013 01:51, sampling point TF080 Barium 1010 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 29, 2013 01:51, sampling point TF080 Cadmium 1015 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 29, 2013 01:51, sampling point TF080 Chromium 1020 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
1.17 mg/l , sample collected Apr 29, 2013 01:51, sampling point TF080 Fluoride 1025 EPA method 300.0 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 29, 2013 01:51, sampling point TF080 Mercury 1035 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.0034 mg/l , sample collected Apr 29, 2013 01:51, sampling point TF080 Nickel 1036 EPA method 200.8 Not recorded
0.0035 mg/l , sample collected Apr 29, 2013 01:51, sampling point TF080 Selenium 1045 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 29, 2013 01:51, sampling point TF080 Antimony, Total 1074 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 29, 2013 01:51, sampling point TF080 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 29, 2013 01:51, sampling point TF080 Thallium, Total 1085 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Collected
Mar 4, 2013 01:23
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
130305-062NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 4, 2013 01:23, sampling point TF080 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 4, 2013 01:23, sampling point TF080 Nitrate 1040 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 4, 2013 01:23, sampling point TF080 Nitrite 1041 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Collected
Oct 9, 2012 09:34
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
201301120063
Laboratory
Radiation Safety Engineering
0.7 pci/l , sample collected Oct 9, 2012 09:34, sampling point TF080 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.29 pci/l Minimum Reporting Level , sample collected Oct 9, 2012 09:34, sampling point TF080 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.186 pci/l Minimum Reporting Level , sample collected Oct 9, 2012 09:34, sampling point TF080 Radium-226 4020 EPA method 903.1 Oct 1, 2012 – Dec 31, 2012
Not detected below 0.29 pci/l Minimum Reporting Level , sample collected Oct 9, 2012 09:34, sampling point TF080 Radium-228 4030 EPA method 904.0 Oct 1, 2012 – Dec 31, 2012
Collected
Oct 8, 2012 14:50
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
121009-119
Laboratory
Radiation Safety Engineering
0.7 pci/l , sample collected Oct 8, 2012 14:50, sampling point TF080 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.29 pci/l Minimum Reporting Level , sample collected Oct 8, 2012 14:50, sampling point TF080 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.186 pci/l Minimum Reporting Level , sample collected Oct 8, 2012 14:50, sampling point TF080 Radium-226 4020 EPA method 903.1 Oct 1, 2012 – Dec 31, 2012
Not detected below 0.29 pci/l Minimum Reporting Level , sample collected Oct 8, 2012 14:50, sampling point TF080 Radium-228 4030 EPA method 904.0 Oct 1, 2012 – Dec 31, 2012
Collected
Sep 26, 2012 01:50
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120927-008CN
Laboratory
MSDH Lab
Not detected below 15 ug/l Minimum Reporting Level , sample collected Sep 26, 2012 01:50, sampling point TF080 Cyanide 1024 EPA method QC10204001X Jan 1, 2011 – Dec 31, 2013
Collected
Aug 8, 2012 08:02
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120809-092
Laboratory
Radiation Safety Engineering
0.7 pci/l , sample collected Aug 8, 2012 08:02, sampling point TF080 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.29 pci/l Minimum Reporting Level , sample collected Aug 8, 2012 08:02, sampling point TF080 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.186 pci/l Minimum Reporting Level , sample collected Aug 8, 2012 08:02, sampling point TF080 Radium-226 4020 EPA method 903.1 Jul 1, 2012 – Sep 30, 2012
Not detected below 0.29 pci/l Minimum Reporting Level , sample collected Aug 8, 2012 08:02, sampling point TF080 Radium-228 4030 EPA method 904.0 Jul 1, 2012 – Sep 30, 2012
Collected
Aug 8, 2012 08:05
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120809-092RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 8, 2012 08:05, sampling point TF080 Combined Uranium 4006 EPA method 200.8 Jul 1, 2012 – Sep 30, 2012
Collected
May 21, 2012 11:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120522-128
Laboratory
Radiation Safety Engineering
0.7 pci/l , sample collected May 21, 2012 11:00, sampling point TF080 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.29 pci/l Minimum Reporting Level , sample collected May 21, 2012 11:00, sampling point TF080 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.186 pci/l Minimum Reporting Level , sample collected May 21, 2012 11:00, sampling point TF080 Radium-226 4020 EPA method 903.1 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.29 pci/l Minimum Reporting Level , sample collected May 21, 2012 11:00, sampling point TF080 Radium-228 4030 EPA method 904.0 Apr 1, 2012 – Jun 30, 2012
Collected
May 21, 2012 11:02
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120522-128RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 21, 2012 11:02, sampling point TF080 Combined Uranium 4006 EPA method 200.8 Apr 1, 2012 – Jun 30, 2012

Routine (10).