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 301–310 of 432 samples, newest first — collected September 14, 2009 to February 1, 2010. The summary above covers all 432.
46 results from the 10 samples listed here: 38 detected, 8 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 2 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 |
|---|---|---|
|
||
| Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Feb 1, 2010, sampling point SM2 | Monochloroacetic Acid 2450 EPA method 552.2 | Not recorded |
| 0.002 mg/l , sample collected Feb 1, 2010, sampling point SM2 | Dichloroacetic Acid 2451 EPA method 552.2 | Not recorded |
| 0.003 mg/l , sample collected Feb 1, 2010, sampling point SM2 | Trichloroacetic Acid 2452 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Feb 1, 2010, sampling point SM2 | Monobromoacetic Acid 2453 EPA method 552.2 | Not recorded |
| 0.002 mg/l , sample collected Feb 1, 2010, sampling point SM2 | Dibromoacetic Acid 2454 EPA method 552.2 | Not recorded |
| 0 mg/l This result is recorded as a detection, and the figure the agency wrote — "0.00" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here. , sample collected Feb 1, 2010, sampling point SM2 | Total Haloacetic Acids (Haa5) 2456 | Not recorded |
|
||
| Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Feb 1, 2010, sampling point SM1 | Monochloroacetic Acid 2450 EPA method 552.2 | Not recorded |
| 0.001 mg/l , sample collected Feb 1, 2010, sampling point SM1 | Dichloroacetic Acid 2451 EPA method 552.2 | Not recorded |
| 0.002 mg/l , sample collected Feb 1, 2010, sampling point SM1 | Trichloroacetic Acid 2452 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Feb 1, 2010, sampling point SM1 | Monobromoacetic Acid 2453 EPA method 552.2 | Not recorded |
| 0.002 mg/l , sample collected Feb 1, 2010, sampling point SM1 | Dibromoacetic Acid 2454 EPA method 552.2 | Not recorded |
| 0 mg/l This result is recorded as a detection, and the figure the agency wrote — "0.00" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here. , sample collected Feb 1, 2010, sampling point SM1 | Total Haloacetic Acids (Haa5) 2456 | Not recorded |
|
||
| 7.26 ug/l , sample collected Feb 1, 2010, sampling point SM2 | Chloroform 2941 EPA method 524.2 | Not recorded |
| 3.88 ug/l , sample collected Feb 1, 2010, sampling point SM2 | Bromoform 2942 EPA method 524.2 | Not recorded |
| 11.3 ug/l , sample collected Feb 1, 2010, sampling point SM2 | Bromodichloromethane 2943 EPA method 524.2 | Not recorded |
| 13.5 ug/l , sample collected Feb 1, 2010, sampling point SM2 | Dibromochloromethane 2944 EPA method 524.2 | Not recorded |
| 35.94 ug/l , sample collected Feb 1, 2010, sampling point SM2 | TTHM 2950 EPA method 524.2 | Not recorded |
|
||
| 5.59 ug/l , sample collected Feb 1, 2010, sampling point SM1 | Chloroform 2941 EPA method 524.2 | Not recorded |
| 4.22 ug/l , sample collected Feb 1, 2010, sampling point SM1 | Bromoform 2942 EPA method 524.2 | Not recorded |
| 10 ug/l , sample collected Feb 1, 2010, sampling point SM1 | Bromodichloromethane 2943 EPA method 524.2 | Not recorded |
| 12.9 ug/l , sample collected Feb 1, 2010, sampling point SM1 | Dibromochloromethane 2944 EPA method 524.2 | Not recorded |
| 32.71 ug/l , sample collected Feb 1, 2010, sampling point SM1 | TTHM 2950 EPA method 524.2 | Not recorded |
|
||
| 0.004 mg/l , sample collected Nov 2, 2009, sampling point SM2 | Monochloroacetic Acid 2450 EPA method 552.2 | Not recorded |
| 0.004 mg/l , sample collected Nov 2, 2009, sampling point SM2 | Dichloroacetic Acid 2451 EPA method 552.2 | Not recorded |
| 0.004 mg/l , sample collected Nov 2, 2009, sampling point SM2 | Trichloroacetic Acid 2452 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Nov 2, 2009, sampling point SM2 | Monobromoacetic Acid 2453 EPA method 552.2 | Not recorded |
| 0.004 mg/l , sample collected Nov 2, 2009, sampling point SM2 | Dibromoacetic Acid 2454 EPA method 552.2 | Not recorded |
| 0.01 mg/l , sample collected Nov 2, 2009, sampling point SM2 | Total Haloacetic Acids (Haa5) 2456 | Not recorded |
|
||
| 0.004 mg/l , sample collected Nov 2, 2009, sampling point SM1 | Monochloroacetic Acid 2450 EPA method 552.2 | Not recorded |
| 0.007 mg/l , sample collected Nov 2, 2009, sampling point SM1 | Dichloroacetic Acid 2451 EPA method 552.2 | Not recorded |
| 0.008 mg/l , sample collected Nov 2, 2009, sampling point SM1 | Trichloroacetic Acid 2452 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Nov 2, 2009, sampling point SM1 | Monobromoacetic Acid 2453 EPA method 552.2 | Not recorded |
| 0.006 mg/l , sample collected Nov 2, 2009, sampling point SM1 | Dibromoacetic Acid 2454 EPA method 552.2 | Not recorded |
| 0.02 mg/l , sample collected Nov 2, 2009, sampling point SM1 | Total Haloacetic Acids (Haa5) 2456 | Not recorded |
|
||
| 9.43 ug/l , sample collected Nov 2, 2009, sampling point SM2 | Chloroform 2941 EPA method 524.2 | Not recorded |
| 5.22 ug/l , sample collected Nov 2, 2009, sampling point SM2 | Bromoform 2942 EPA method 524.2 | Not recorded |
| 13.7 ug/l , sample collected Nov 2, 2009, sampling point SM2 | Bromodichloromethane 2943 EPA method 524.2 | Not recorded |
| 20.3 ug/l , sample collected Nov 2, 2009, sampling point SM2 | Dibromochloromethane 2944 EPA method 524.2 | Not recorded |
| 48.65 ug/l , sample collected Nov 2, 2009, sampling point SM2 | TTHM 2950 EPA method 524.2 | Not recorded |
|
||
| 19.3 ug/l , sample collected Nov 2, 2009, sampling point SM1 | Chloroform 2941 EPA method 524.2 | Not recorded |
| 6.37 ug/l , sample collected Nov 2, 2009, sampling point SM1 | Bromoform 2942 EPA method 524.2 | Not recorded |
| 27 ug/l , sample collected Nov 2, 2009, sampling point SM1 | Bromodichloromethane 2943 EPA method 524.2 | Not recorded |
| 33.2 ug/l , sample collected Nov 2, 2009, sampling point SM1 | Dibromochloromethane 2944 EPA method 524.2 | Not recorded |
| 85.87 ug/l , sample collected Nov 2, 2009, sampling point SM1 | TTHM 2950 EPA method 524.2 | Not recorded |
|
||
| Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Sep 14, 2009, sampling point TF101 | Cyanide 1024 EPA method QC10204001X | Jan 1, 2008 – Dec 31, 2010 |
|
||
| Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Sep 14, 2009, sampling point TF103 | Cyanide 1024 EPA method QC10204001X | Jan 1, 2008 – Dec 31, 2010 |
-
- Collected
- Feb 1, 2010
- Sampling point
- SM2 Location withheld
- Sample type
- Routine
- Lab sample
- 100202-012HA
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Monochloroacetic Acid 2450 EPA method 552.2
- Result
- Not detected below 0.002 mg/l Minimum Reporting Level
-
Dichloroacetic Acid 2451 EPA method 552.2
- Result
- 0.002 mg/l
-
Trichloroacetic Acid 2452 EPA method 552.2
- Result
- 0.003 mg/l
-
Monobromoacetic Acid 2453 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
-
Dibromoacetic Acid 2454 EPA method 552.2
- Result
- 0.002 mg/l
-
Total Haloacetic Acids (Haa5) 2456
- Result
- 0 mg/l This result is recorded as a detection, and the figure the agency wrote — "0.00" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here.
-
- Collected
- Feb 1, 2010
- Sampling point
- SM1 Location withheld
- Sample type
- Routine
- Lab sample
- 100202-011HA
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Monochloroacetic Acid 2450 EPA method 552.2
- Result
- Not detected below 0.002 mg/l Minimum Reporting Level
-
Dichloroacetic Acid 2451 EPA method 552.2
- Result
- 0.001 mg/l
-
Trichloroacetic Acid 2452 EPA method 552.2
- Result
- 0.002 mg/l
-
Monobromoacetic Acid 2453 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
-
Dibromoacetic Acid 2454 EPA method 552.2
- Result
- 0.002 mg/l
-
Total Haloacetic Acids (Haa5) 2456
- Result
- 0 mg/l This result is recorded as a detection, and the figure the agency wrote — "0.00" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here.
-
- Collected
- Feb 1, 2010
- Sampling point
- SM2 Location withheld
- Sample type
- Routine
- Lab sample
- 100202-012TH
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Chloroform 2941 EPA method 524.2
- Result
- 7.26 ug/l
-
Bromoform 2942 EPA method 524.2
- Result
- 3.88 ug/l
-
Bromodichloromethane 2943 EPA method 524.2
- Result
- 11.3 ug/l
-
Dibromochloromethane 2944 EPA method 524.2
- Result
- 13.5 ug/l
-
TTHM 2950 EPA method 524.2
- Result
- 35.94 ug/l
-
- Collected
- Feb 1, 2010
- Sampling point
- SM1 Location withheld
- Sample type
- Routine
- Lab sample
- 100202-011TH
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Chloroform 2941 EPA method 524.2
- Result
- 5.59 ug/l
-
Bromoform 2942 EPA method 524.2
- Result
- 4.22 ug/l
-
Bromodichloromethane 2943 EPA method 524.2
- Result
- 10 ug/l
-
Dibromochloromethane 2944 EPA method 524.2
- Result
- 12.9 ug/l
-
TTHM 2950 EPA method 524.2
- Result
- 32.71 ug/l
-
- Collected
- Nov 2, 2009
- Sampling point
- SM2 Location withheld
- Sample type
- Routine
- Lab sample
- 091103-018HA
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Monochloroacetic Acid 2450 EPA method 552.2
- Result
- 0.004 mg/l
-
Dichloroacetic Acid 2451 EPA method 552.2
- Result
- 0.004 mg/l
-
Trichloroacetic Acid 2452 EPA method 552.2
- Result
- 0.004 mg/l
-
Monobromoacetic Acid 2453 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
-
Dibromoacetic Acid 2454 EPA method 552.2
- Result
- 0.004 mg/l
-
Total Haloacetic Acids (Haa5) 2456
- Result
- 0.01 mg/l
-
- Collected
- Nov 2, 2009
- Sampling point
- SM1 Location withheld
- Sample type
- Routine
- Lab sample
- 091103-017HA
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Monochloroacetic Acid 2450 EPA method 552.2
- Result
- 0.004 mg/l
-
Dichloroacetic Acid 2451 EPA method 552.2
- Result
- 0.007 mg/l
-
Trichloroacetic Acid 2452 EPA method 552.2
- Result
- 0.008 mg/l
-
Monobromoacetic Acid 2453 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
-
Dibromoacetic Acid 2454 EPA method 552.2
- Result
- 0.006 mg/l
-
Total Haloacetic Acids (Haa5) 2456
- Result
- 0.02 mg/l
-
- Collected
- Nov 2, 2009
- Sampling point
- SM2 Location withheld
- Sample type
- Routine
- Lab sample
- 091103-038TH
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Chloroform 2941 EPA method 524.2
- Result
- 9.43 ug/l
-
Bromoform 2942 EPA method 524.2
- Result
- 5.22 ug/l
-
Bromodichloromethane 2943 EPA method 524.2
- Result
- 13.7 ug/l
-
Dibromochloromethane 2944 EPA method 524.2
- Result
- 20.3 ug/l
-
TTHM 2950 EPA method 524.2
- Result
- 48.65 ug/l
-
- Collected
- Nov 2, 2009
- Sampling point
- SM1 Location withheld
- Sample type
- Routine
- Lab sample
- 091103-037TH
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Chloroform 2941 EPA method 524.2
- Result
- 19.3 ug/l
-
Bromoform 2942 EPA method 524.2
- Result
- 6.37 ug/l
-
Bromodichloromethane 2943 EPA method 524.2
- Result
- 27 ug/l
-
Dibromochloromethane 2944 EPA method 524.2
- Result
- 33.2 ug/l
-
TTHM 2950 EPA method 524.2
- Result
- 85.87 ug/l
-
- Collected
- Sep 14, 2009
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- 090915-007CN
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2008 – Dec 31, 2010
-
Cyanide 1024 EPA method QC10204001X
- Result
- Not detected below 0.015 mg/l Minimum Reporting Level
-
- Collected
- Sep 14, 2009
- Sampling point
- TF103 Treatment Plant T103
- Sample type
- Routine
- Lab sample
- 090915-006CN
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2008 – Dec 31, 2010
-
Cyanide 1024 EPA method QC10204001X
- Result
- Not detected below 0.015 mg/l Minimum Reporting Level
Routine (10).