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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

MS0160010 , Willow Grove Water Assn

16 of the 57 analytes this system has been tested for have been detected at least once, across 559 samples on record.

The other 41 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 559 samples on record, detections range from December 31, 1993 to January 28, 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.

Every analyte ever detected for Willow Grove Water Assn, 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 280 of 315 results Dec 31, 1993 Aug 6, 2024
Lead 1030 Inorganic Chemical 192 of 315 results Dec 31, 1993 Aug 6, 2024
Nitrate-Nitrite 1038 Inorganic Chemical 50 of 69 results May 3, 2004 Jan 28, 2026
Nitrate 1040 Inorganic Chemical 50 of 69 results May 3, 2004 Jan 28, 2026
Barium 1010 Inorganic Chemical 34 of 34 results Apr 23, 2002 Feb 5, 2025
Nickel 1036 Inorganic Chemical 27 of 34 results Apr 23, 2002 Feb 5, 2025
Gross Alpha, Incl. Radon & U 4002 Radionuclide 15 of 15 results Mar 8, 2012 Oct 11, 2012
Sodium 1052 Inorganic Chemical 9 of 9 results Sep 25, 2019 Oct 14, 2024
Fluoride 1025 Inorganic Chemical 9 of 34 results Apr 23, 2002 Oct 3, 2018
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 7 of 21 results Jul 9, 2007 Mar 12, 2025
Chromium 1020 Inorganic Chemical 7 of 34 results Apr 23, 2002 Apr 14, 2014
Sulfate 1055 Inorganic Chemical 6 of 7 results Apr 23, 2002 Jan 28, 2004
Selenium 1045 Inorganic Chemical 4 of 34 results Feb 28, 2005 Mar 20, 2006
Xylenes, Total 2955 Organic Chemical 2 of 46 results Jul 17, 2012 Jul 17, 2012
TTHM 2950 Organic Chemical 2 of 19 results Jul 9, 2007 Sep 16, 2008
Chloroform 2941 Organic Chemical 1 of 14 results Jul 9, 2007 Jul 9, 2007

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 291–300 of 559 samples, newest first — collected July 17, 2012 to July 30, 2012. The summary above covers all 559.

21 results from the 10 samples listed here: 10 detected, 11 not detected. Across the whole record it is 695 of 2,458. 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 Willow Grove Water Assn, every result from 291 to 300 of 559 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 30, 2012 13:00
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
120731-028
Laboratory
Radiation Safety Engineering
0.7 pci/l , sample collected Jul 30, 2012 13:00, sampling point TF101 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.37 pci/l Minimum Reporting Level , sample collected Jul 30, 2012 13:00, sampling point TF101 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.261 pci/l Minimum Reporting Level , sample collected Jul 30, 2012 13:00, sampling point TF101 Radium-226 4020 EPA method 903.1 Jul 1, 2012 – Sep 30, 2012
Not detected below 0.37 pci/l Minimum Reporting Level , sample collected Jul 30, 2012 13:00, sampling point TF101 Radium-228 4030 EPA method 904.0 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 30, 2012 13:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120731-038
Laboratory
Radiation Safety Engineering
1.1 pci/l , sample collected Jul 30, 2012 13:00, sampling point TF080 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.38 pci/l Minimum Reporting Level , sample collected Jul 30, 2012 13:00, sampling point TF080 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.292 pci/l Minimum Reporting Level , sample collected Jul 30, 2012 13:00, sampling point TF080 Radium-226 4020 EPA method 903.1 Jul 1, 2012 – Sep 30, 2012
Not detected below 0.38 pci/l Minimum Reporting Level , sample collected Jul 30, 2012 13:00, sampling point TF080 Radium-228 4030 EPA method 904.0 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 30, 2012 13:30
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
120731-039RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 30, 2012 13:30, sampling point TF102 Combined Uranium 4006 EPA method 200.8 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 30, 2012 13:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120731-038RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 30, 2012 13:00, sampling point TF080 Combined Uranium 4006 EPA method 200.8 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 30, 2012 13:15
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
120731-028RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 30, 2012 13:15, sampling point TF101 Combined Uranium 4006 EPA method 200.8 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 18, 2012 07:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
120719-037PB
Laboratory
MSDH Lab
0.0042 mg/l , sample collected Jul 18, 2012 07:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 18, 2012 07:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
Collected
Jul 18, 2012 08:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
120719-036PB
Laboratory
MSDH Lab
0.1164 mg/l , sample collected Jul 18, 2012 08:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
0.0008 mg/l , sample collected Jul 18, 2012 08:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
Collected
Jul 18, 2012 08:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
120719-032PB
Laboratory
MSDH Lab
0.0027 mg/l , sample collected Jul 18, 2012 08:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 18, 2012 08:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
Collected
Jul 18, 2012 05:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
120719-015PB
Laboratory
MSDH Lab
0.3074 mg/l , sample collected Jul 18, 2012 05:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
0.0015 mg/l , sample collected Jul 18, 2012 05:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
Collected
Jul 17, 2012 13:51
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
120719-035PB
Laboratory
MSDH Lab
0.6293 mg/l , sample collected Jul 17, 2012 13:51, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
0.0014 mg/l , sample collected Jul 17, 2012 13:51, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012

Routine (10).