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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 321–330 of 559 samples, newest first — collected August 17, 2011 to March 8, 2012. The summary above covers all 559.

25 results from the 10 samples listed here: 6 detected, 19 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 321 to 330 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
Mar 8, 2012 15:45
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
120309-042RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 8, 2012 15:45, sampling point TF101 Combined Uranium 4006 EPA method 200.8 Jan 1, 2012 – Mar 31, 2012
Collected
Mar 8, 2012 14:45
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120309-041RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 8, 2012 14:45, sampling point TF080 Combined Uranium 4006 EPA method 200.8 Jan 1, 2012 – Mar 31, 2012
Collected
Feb 8, 2012 03:45
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
120209-069NI
Laboratory
MSDH Lab
0.22 mg/l , sample collected Feb 8, 2012 03:45, sampling point TF102 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
0.22 mg/l , sample collected Feb 8, 2012 03:45, sampling point TF102 Nitrate 1040 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 8, 2012 03:45, sampling point TF102 Nitrite 1041 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Collected
Feb 8, 2012 03:15
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120209-068NI
Laboratory
MSDH Lab
0.23 mg/l , sample collected Feb 8, 2012 03:15, sampling point TF080 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
0.22 mg/l , sample collected Feb 8, 2012 03:15, sampling point TF080 Nitrate 1040 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 8, 2012 03:15, sampling point TF080 Nitrite 1041 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Collected
Feb 8, 2012 03:30
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
120209-067NI
Laboratory
MSDH Lab
0.24 mg/l , sample collected Feb 8, 2012 03:30, sampling point TF101 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
0.24 mg/l , sample collected Feb 8, 2012 03:30, sampling point TF101 Nitrate 1040 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 8, 2012 03:30, sampling point TF101 Nitrite 1041 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Collected
Aug 30, 2011 02:20
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
110831-003TH
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 30, 2011 02:20, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 30, 2011 02:20, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 30, 2011 02:20, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 30, 2011 02:20, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
Not detected below 4 ug/l Minimum Reporting Level , sample collected Aug 30, 2011 02:20, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2011 – Dec 31, 2013
Collected
Aug 30, 2011 04:10
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
110831-003HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Aug 30, 2011 04:10, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Aug 30, 2011 04:10, sampling point MRT000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Aug 30, 2011 04:10, sampling point MRT000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Aug 30, 2011 04:10, sampling point MRT000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Aug 30, 2011 04:10, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 0.006 mg/l Minimum Reporting Level , sample collected Aug 30, 2011 04:10, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 Jan 1, 2011 – Dec 31, 2013
Collected
Aug 17, 2011 03:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
110818-017CN
Laboratory
MSDH Lab
Not detected below 15 ug/l Minimum Reporting Level , sample collected Aug 17, 2011 03:00, sampling point TF080 Cyanide 1024 EPA method QC10204001X Jan 1, 2011 – Dec 31, 2013
Collected
Aug 17, 2011 03:15
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
110818-014CN
Laboratory
MSDH Lab
Not detected below 15 ug/l Minimum Reporting Level , sample collected Aug 17, 2011 03:15, sampling point TF102 Cyanide 1024 EPA method QC10204001X Jan 1, 2011 – Dec 31, 2013
Collected
Aug 17, 2011 02:45
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
110818-005CN
Laboratory
MSDH Lab
Not detected below 15 ug/l Minimum Reporting Level , sample collected Aug 17, 2011 02:45, sampling point TF101 Cyanide 1024 EPA method QC10204001X Jan 1, 2011 – Dec 31, 2013

Routine (10).