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.
| 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 1–10 of 432 samples, newest first — collected July 28, 2026 to July 30, 2026. The summary above covers all 432.
20 results from the 10 samples listed here: 15 detected, 5 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.
We withheld the location of 10 sampling points below. The location on record identifies a private home, and we do not publish those. That is our decision, not the agency’s. The sampling point, its type and every result taken there are published unchanged.
| Result | Analyte | Monitoring period |
|---|---|---|
|
||
| 160 ug/l , sample collected Jul 30, 2026, sampling point LC0025 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2024 – Dec 31, 2026 |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 30, 2026, sampling point LC0025 | Lead 1030 EPA method 200.8 | Jan 1, 2024 – Dec 31, 2026 |
|
||
| 490 ug/l , sample collected Jul 29, 2026, sampling point LC0027 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2024 – Dec 31, 2026 |
| 1.1 ug/l , sample collected Jul 29, 2026, sampling point LC0027 | Lead 1030 EPA method 200.8 | Jan 1, 2024 – Dec 31, 2026 |
|
||
| 193 ug/l , sample collected Jul 29, 2026, sampling point LC0034 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2024 – Dec 31, 2026 |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 29, 2026, sampling point LC0034 | Lead 1030 EPA method 200.8 | Jan 1, 2024 – Dec 31, 2026 |
|
||
| 703 ug/l , sample collected Jul 29, 2026, sampling point LC0008 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2024 – Dec 31, 2026 |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 29, 2026, sampling point LC0008 | Lead 1030 EPA method 200.8 | Jan 1, 2024 – Dec 31, 2026 |
|
||
| 631 ug/l , sample collected Jul 29, 2026, sampling point LC0009 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2024 – Dec 31, 2026 |
| 1.5 ug/l , sample collected Jul 29, 2026, sampling point LC0009 | Lead 1030 EPA method 200.8 | Jan 1, 2024 – Dec 31, 2026 |
|
||
| 180 ug/l , sample collected Jul 29, 2026, sampling point LC0016 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2024 – Dec 31, 2026 |
| 1.5 ug/l , sample collected Jul 29, 2026, sampling point LC0016 | Lead 1030 EPA method 200.8 | Jan 1, 2024 – Dec 31, 2026 |
|
||
| 199 ug/l , sample collected Jul 29, 2026, sampling point LC0028 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2024 – Dec 31, 2026 |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 29, 2026, sampling point LC0028 | Lead 1030 EPA method 200.8 | Jan 1, 2024 – Dec 31, 2026 |
|
||
| 70.9 ug/l , sample collected Jul 29, 2026, sampling point LC0026 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2024 – Dec 31, 2026 |
| 2.4 ug/l , sample collected Jul 29, 2026, sampling point LC0026 | Lead 1030 EPA method 200.8 | Jan 1, 2024 – Dec 31, 2026 |
|
||
| 526 ug/l , sample collected Jul 29, 2026, sampling point LC0033 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2024 – Dec 31, 2026 |
| 6 ug/l , sample collected Jul 29, 2026, sampling point LC0033 | Lead 1030 EPA method 200.8 | Jan 1, 2024 – Dec 31, 2026 |
|
||
| 532 ug/l , sample collected Jul 28, 2026, sampling point LC0029 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2024 – Dec 31, 2026 |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 28, 2026, sampling point LC0029 | Lead 1030 EPA method 200.8 | Jan 1, 2024 – Dec 31, 2026 |
-
- Collected
- Jul 30, 2026
- Sampling point
- LC0025 Location withheld
- Sample type
- Routine
- Lab sample
- 35055015002
- Laboratory
- Pace Analytical Services, LLC
- Monitoring period
- Jan 1, 2024 – Dec 31, 2026
-
Copper, Free 1022 EPA method 200.8
- Result
- 160 ug/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 1 ug/l Minimum Reporting Level
-
- Collected
- Jul 29, 2026
- Sampling point
- LC0027 Location withheld
- Sample type
- Routine
- Lab sample
- 35055015010
- Laboratory
- Pace Analytical Services, LLC
- Monitoring period
- Jan 1, 2024 – Dec 31, 2026
-
Copper, Free 1022 EPA method 200.8
- Result
- 490 ug/l
-
Lead 1030 EPA method 200.8
- Result
- 1.1 ug/l
-
- Collected
- Jul 29, 2026
- Sampling point
- LC0034 Location withheld
- Sample type
- Routine
- Lab sample
- 35055015009
- Laboratory
- Pace Analytical Services, LLC
- Monitoring period
- Jan 1, 2024 – Dec 31, 2026
-
Copper, Free 1022 EPA method 200.8
- Result
- 193 ug/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 1 ug/l Minimum Reporting Level
-
- Collected
- Jul 29, 2026
- Sampling point
- LC0008 Location withheld
- Sample type
- Routine
- Lab sample
- 35055015008
- Laboratory
- Pace Analytical Services, LLC
- Monitoring period
- Jan 1, 2024 – Dec 31, 2026
-
Copper, Free 1022 EPA method 200.8
- Result
- 703 ug/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 1 ug/l Minimum Reporting Level
-
- Collected
- Jul 29, 2026
- Sampling point
- LC0009 Location withheld
- Sample type
- Routine
- Lab sample
- 35055015007
- Laboratory
- Pace Analytical Services, LLC
- Monitoring period
- Jan 1, 2024 – Dec 31, 2026
-
Copper, Free 1022 EPA method 200.8
- Result
- 631 ug/l
-
Lead 1030 EPA method 200.8
- Result
- 1.5 ug/l
-
- Collected
- Jul 29, 2026
- Sampling point
- LC0016 Location withheld
- Sample type
- Routine
- Lab sample
- 35055015006
- Laboratory
- Pace Analytical Services, LLC
- Monitoring period
- Jan 1, 2024 – Dec 31, 2026
-
Copper, Free 1022 EPA method 200.8
- Result
- 180 ug/l
-
Lead 1030 EPA method 200.8
- Result
- 1.5 ug/l
-
- Collected
- Jul 29, 2026
- Sampling point
- LC0028 Location withheld
- Sample type
- Routine
- Lab sample
- 35055015005
- Laboratory
- Pace Analytical Services, LLC
- Monitoring period
- Jan 1, 2024 – Dec 31, 2026
-
Copper, Free 1022 EPA method 200.8
- Result
- 199 ug/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 1 ug/l Minimum Reporting Level
-
- Collected
- Jul 29, 2026
- Sampling point
- LC0026 Location withheld
- Sample type
- Routine
- Lab sample
- 35055015004
- Laboratory
- Pace Analytical Services, LLC
- Monitoring period
- Jan 1, 2024 – Dec 31, 2026
-
Copper, Free 1022 EPA method 200.8
- Result
- 70.9 ug/l
-
Lead 1030 EPA method 200.8
- Result
- 2.4 ug/l
-
- Collected
- Jul 29, 2026
- Sampling point
- LC0033 Location withheld
- Sample type
- Routine
- Lab sample
- 35055015001
- Laboratory
- Pace Analytical Services, LLC
- Monitoring period
- Jan 1, 2024 – Dec 31, 2026
-
Copper, Free 1022 EPA method 200.8
- Result
- 526 ug/l
-
Lead 1030 EPA method 200.8
- Result
- 6 ug/l
-
- Collected
- Jul 28, 2026
- Sampling point
- LC0029 Location withheld
- Sample type
- Routine
- Lab sample
- 35055015003
- Laboratory
- Pace Analytical Services, LLC
- Monitoring period
- Jan 1, 2024 – Dec 31, 2026
-
Copper, Free 1022 EPA method 200.8
- Result
- 532 ug/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 1 ug/l Minimum Reporting Level
Routine (10).