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 433 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 433 samples on record, detections range from September 24, 2003 to August 11, 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 |
| TTHM 2950 | Organic Chemical | 62 of 62 results | Sep 15, 2004 | Aug 11, 2026 |
| Total Haloacetic Acids (Haa5) 2456 | Organic Chemical | 62 of 62 results | Sep 15, 2004 | Jun 25, 2026 |
| Lead 1030 | Inorganic Chemical | 51 of 77 results | Jul 24, 2007 | Jul 29, 2026 |
| Dibromochloromethane 2944 | Organic Chemical | 48 of 48 results | May 17, 2006 | Aug 11, 2026 |
| Chloroform 2941 | Organic Chemical | 47 of 48 results | May 17, 2006 | Aug 11, 2026 |
| Bromoform 2942 | Organic Chemical | 47 of 48 results | May 17, 2006 | Aug 11, 2026 |
| Bromodichloromethane 2943 | Organic Chemical | 47 of 48 results | May 17, 2006 | Aug 11, 2026 |
| 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 371–380 of 433 samples, newest first — collected February 13, 2006 to November 30, 2006. The summary above covers all 433.
39 results from the 10 samples listed here: 21 detected, 18 not detected. Across the whole record it is 719 of 3,154. A sample is analysed for many analytes at once, so one sample appears on as many rows as it had results.
| Result | Analyte | Monitoring period |
|---|---|---|
|
||
| 13.2 ug/l , sample collected Nov 30, 2006, sampling point MRT000 | Chloroform 2941 EPA method 551.1 | Not recorded |
| 3.56 ug/l , sample collected Nov 30, 2006, sampling point MRT000 | Bromoform 2942 EPA method 551.1 | Not recorded |
| 16 ug/l , sample collected Nov 30, 2006, sampling point MRT000 | Bromodichloromethane 2943 EPA method 551.1 | Not recorded |
| 18.1 ug/l , sample collected Nov 30, 2006, sampling point MRT000 | Dibromochloromethane 2944 EPA method 551.1 | Not recorded |
| 50.86 ug/l , sample collected Nov 30, 2006, sampling point MRT000 | TTHM 2950 EPA method 551.1 | Oct 1, 2006 – Dec 31, 2006 |
|
||
| 17.5 ug/l , sample collected Aug 14, 2006, sampling point MRT000 | Chloroform 2941 EPA method 551.1 | Not recorded |
| 7.73 ug/l , sample collected Aug 14, 2006, sampling point MRT000 | Bromoform 2942 EPA method 551.1 | Not recorded |
| 29.2 ug/l , sample collected Aug 14, 2006, sampling point MRT000 | Bromodichloromethane 2943 EPA method 551.1 | Not recorded |
| 32.2 ug/l , sample collected Aug 14, 2006, sampling point MRT000 | Dibromochloromethane 2944 EPA method 551.1 | Not recorded |
| 86.63 ug/l , sample collected Aug 14, 2006, sampling point MRT000 | TTHM 2950 EPA method 551.1 | Jul 1, 2006 – Sep 30, 2006 |
|
||
| Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jun 26, 2006, sampling point TF102 | Nitrate-Nitrite 1038 EPA method 353.2 | Jan 1, 2006 – Dec 31, 2006 |
| Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jun 26, 2006, sampling point TF102 | Nitrate 1040 EPA method 353.2 | Jan 1, 2006 – Dec 31, 2006 |
| Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jun 26, 2006, sampling point TF102 | Nitrite 1041 EPA method 353.2 | Jan 1, 2006 – Dec 31, 2006 |
|
||
| Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jun 26, 2006, sampling point TF103 | Nitrate-Nitrite 1038 EPA method 353.2 | Jan 1, 2006 – Dec 31, 2006 |
| Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jun 26, 2006, sampling point TF103 | Nitrate 1040 EPA method 353.2 | Jan 1, 2006 – Dec 31, 2006 |
| Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jun 26, 2006, sampling point TF103 | Nitrite 1041 EPA method 353.2 | Jan 1, 2006 – Dec 31, 2006 |
|
||
| Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jun 26, 2006, sampling point TF101 | Nitrate-Nitrite 1038 EPA method 353.2 | Jan 1, 2006 – Dec 31, 2006 |
| Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jun 26, 2006, sampling point TF101 | Nitrate 1040 EPA method 353.2 | Jan 1, 2006 – Dec 31, 2006 |
| Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jun 26, 2006, sampling point TF101 | Nitrite 1041 EPA method 353.2 | Jan 1, 2006 – Dec 31, 2006 |
|
||
| 0.041 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 17, 2006, sampling point MRT000 | Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 | Apr 1, 2006 – Jun 30, 2006 |
|
||
| 33 ug/l , sample collected May 17, 2006, sampling point MRT000 | Chloroform 2941 EPA method 551.1 | Not recorded |
| 3.6 ug/l , sample collected May 17, 2006, sampling point MRT000 | Bromoform 2942 EPA method 551.1 | Not recorded |
| 29.4 ug/l , sample collected May 17, 2006, sampling point MRT000 | Bromodichloromethane 2943 EPA method 551.1 | Not recorded |
| 28.2 ug/l , sample collected May 17, 2006, sampling point MRT000 | Dibromochloromethane 2944 EPA method 551.1 | Not recorded |
| 94.2 ug/l , sample collected May 17, 2006, sampling point MRT000 | TTHM 2950 EPA method 551.1 | Apr 1, 2006 – Jun 30, 2006 |
|
||
| 0.0029 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected Mar 28, 2006, sampling point MRT000 | Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 | Jan 1, 2006 – Mar 31, 2006 |
|
||
| 61.9 ug/l , sample collected Mar 2, 2006, sampling point MRT000 | TTHM 2950 EPA method 524.2 | Jan 1, 2006 – Mar 31, 2006 |
|
||
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 13, 2006, sampling point TF103 | Arsenic 1005 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| 0.001373 mg/l , sample collected Feb 13, 2006, sampling point TF103 | Barium 1010 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0001 mg/l Minimum Reporting Level , sample collected Feb 13, 2006, sampling point TF103 | Cadmium 1015 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| 0.000553 mg/l , sample collected Feb 13, 2006, sampling point TF103 | Chromium 1020 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| 0.442228 mg/l , sample collected Feb 13, 2006, sampling point TF103 | Fluoride 1025 EPA method 380-75WE | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0002 mg/l Minimum Reporting Level , sample collected Feb 13, 2006, sampling point TF103 | Mercury 1035 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 13, 2006, sampling point TF103 | Nickel 1036 EPA method 200.8 | Not recorded |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 13, 2006, sampling point TF103 | Selenium 1045 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 13, 2006, sampling point TF103 | Antimony, Total 1074 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0001 mg/l Minimum Reporting Level , sample collected Feb 13, 2006, sampling point TF103 | Beryllium, Total 1075 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 13, 2006, sampling point TF103 | Thallium, Total 1085 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 13, 2006, sampling point TF103 | Uranium-238 4009 | Not recorded |
-
- Collected
- Nov 30, 2006
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 061201-003TH
- Laboratory
- MSDH Lab
-
Chloroform 2941 EPA method 551.1
- Result
- 13.2 ug/l
- Monitoring period
- Not recorded
-
Bromoform 2942 EPA method 551.1
- Result
- 3.56 ug/l
- Monitoring period
- Not recorded
-
Bromodichloromethane 2943 EPA method 551.1
- Result
- 16 ug/l
- Monitoring period
- Not recorded
-
Dibromochloromethane 2944 EPA method 551.1
- Result
- 18.1 ug/l
- Monitoring period
- Not recorded
-
TTHM 2950 EPA method 551.1
- Result
- 50.86 ug/l
- Monitoring period
- Oct 1, 2006 – Dec 31, 2006
-
- Collected
- Aug 14, 2006
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 060815-001TH
- Laboratory
- MSDH Lab
-
Chloroform 2941 EPA method 551.1
- Result
- 17.5 ug/l
- Monitoring period
- Not recorded
-
Bromoform 2942 EPA method 551.1
- Result
- 7.73 ug/l
- Monitoring period
- Not recorded
-
Bromodichloromethane 2943 EPA method 551.1
- Result
- 29.2 ug/l
- Monitoring period
- Not recorded
-
Dibromochloromethane 2944 EPA method 551.1
- Result
- 32.2 ug/l
- Monitoring period
- Not recorded
-
TTHM 2950 EPA method 551.1
- Result
- 86.63 ug/l
- Monitoring period
- Jul 1, 2006 – Sep 30, 2006
-
- Collected
- Jun 26, 2006
- Sampling point
- TF102 Treatment Plant T102
- Sample type
- Routine
- Lab sample
- 060627-046NI
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2006 – Dec 31, 2006
-
Nitrate-Nitrite 1038 EPA method 353.2
- Result
- Not detected below 0.1 mg/l Minimum Reporting Level
-
Nitrate 1040 EPA method 353.2
- Result
- Not detected below 0.08 mg/l Minimum Reporting Level
-
Nitrite 1041 EPA method 353.2
- Result
- Not detected below 0.02 mg/l Minimum Reporting Level
-
- Collected
- Jun 26, 2006
- Sampling point
- TF103 Treatment Plant T103
- Sample type
- Routine
- Lab sample
- 060627-045NI
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2006 – Dec 31, 2006
-
Nitrate-Nitrite 1038 EPA method 353.2
- Result
- Not detected below 0.1 mg/l Minimum Reporting Level
-
Nitrate 1040 EPA method 353.2
- Result
- Not detected below 0.08 mg/l Minimum Reporting Level
-
Nitrite 1041 EPA method 353.2
- Result
- Not detected below 0.02 mg/l Minimum Reporting Level
-
- Collected
- Jun 26, 2006
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- 060627-047NI
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2006 – Dec 31, 2006
-
Nitrate-Nitrite 1038 EPA method 353.2
- Result
- Not detected below 0.1 mg/l Minimum Reporting Level
-
Nitrate 1040 EPA method 353.2
- Result
- Not detected below 0.08 mg/l Minimum Reporting Level
-
Nitrite 1041 EPA method 353.2
- Result
- Not detected below 0.02 mg/l Minimum Reporting Level
-
- Collected
- May 17, 2006
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 060518-002HA
- Laboratory
- MSDH Lab
- Monitoring period
- Apr 1, 2006 – Jun 30, 2006
-
Total Haloacetic Acids (Haa5) 2456 EPA method 552.2
- Result
- 0.041 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType.
-
- Collected
- May 17, 2006
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 060518-002TH
- Laboratory
- MSDH Lab
-
Chloroform 2941 EPA method 551.1
- Result
- 33 ug/l
- Monitoring period
- Not recorded
-
Bromoform 2942 EPA method 551.1
- Result
- 3.6 ug/l
- Monitoring period
- Not recorded
-
Bromodichloromethane 2943 EPA method 551.1
- Result
- 29.4 ug/l
- Monitoring period
- Not recorded
-
Dibromochloromethane 2944 EPA method 551.1
- Result
- 28.2 ug/l
- Monitoring period
- Not recorded
-
TTHM 2950 EPA method 551.1
- Result
- 94.2 ug/l
- Monitoring period
- Apr 1, 2006 – Jun 30, 2006
-
- Collected
- Mar 28, 2006
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 060329-007HA
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2006 – Mar 31, 2006
-
Total Haloacetic Acids (Haa5) 2456 EPA method 552.2
- Result
- 0.0029 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType.
-
- Collected
- Mar 2, 2006
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 060303-004TH
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2006 – Mar 31, 2006
-
TTHM 2950 EPA method 524.2
- Result
- 61.9 ug/l
-
- Collected
- Feb 13, 2006
- Sampling point
- TF103 Treatment Plant T103
- Sample type
- Routine
- Lab sample
- 060214-081IN
- Laboratory
- MSDH Lab
-
Arsenic 1005 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Barium 1010 EPA method 200.8
- Result
- 0.001373 mg/l
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Cadmium 1015 EPA method 200.8
- Result
- Not detected below 0.0001 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Chromium 1020 EPA method 200.8
- Result
- 0.000553 mg/l
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Fluoride 1025 EPA method 380-75WE
- Result
- 0.442228 mg/l
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Mercury 1035 EPA method 200.8
- Result
- Not detected below 0.0002 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Nickel 1036 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Selenium 1045 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Antimony, Total 1074 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Beryllium, Total 1075 EPA method 200.8
- Result
- Not detected below 0.0001 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Thallium, Total 1085 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Uranium-238 4009
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
Routine (10).