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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

MS0580007 , Randolph Water Association #1

21 of the 58 analytes this system has been tested for have been detected at least once, across 297 samples on record.

The other 37 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 297 samples on record, detections range from October 15, 2003 to August 19, 2025. 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 Randolph Water Association #1, 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 90 of 90 results Aug 9, 2004 Jun 24, 2025
Lead 1030 Inorganic Chemical 60 of 90 results Aug 9, 2004 Jun 24, 2025
Barium 1010 Inorganic Chemical 27 of 27 results Oct 15, 2003 Mar 19, 2025
Fluoride 1025 Inorganic Chemical 25 of 27 results Oct 15, 2003 Mar 19, 2025
Nickel 1036 Inorganic Chemical 19 of 27 results Mar 15, 2004 Mar 19, 2025
Arsenic 1005 Inorganic Chemical 17 of 27 results Mar 15, 2004 Mar 19, 2025
Chromium 1020 Inorganic Chemical 11 of 27 results Oct 15, 2003 Apr 1, 2020
Nitrite 1041 Inorganic Chemical 10 of 56 results Sep 26, 2005 Apr 9, 2024
Selenium 1045 Inorganic Chemical 10 of 27 results Mar 15, 2004 Apr 1, 2020
Gross Alpha, Incl. Radon & U 4002 Radionuclide 10 of 10 results Dec 5, 2011 Jul 10, 2012
TTHM 2950 Organic Chemical 9 of 11 results Sep 4, 2007 Aug 19, 2025
Sodium 1052 Inorganic Chemical 6 of 6 results Sep 19, 2019 Mar 3, 2025
Combined Radium (-226 & -228) 4010 Radionuclide 6 of 11 results Dec 5, 2011 Jun 9, 2020
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 5 of 11 results Sep 4, 2007 Jun 12, 2024
Radium-226 4020 Radionuclide 5 of 11 results Dec 5, 2011 Jul 10, 2012
Nitrate-Nitrite 1038 Inorganic Chemical 5 of 56 results Sep 26, 2005 Jun 1, 2009
Nitrate 1040 Inorganic Chemical 3 of 56 results Sep 26, 2005 Jul 14, 2008
Bromoform 2942 Organic Chemical 2 of 5 results Aug 8, 2016 Dec 14, 2020
Xylenes, Total 2955 Organic Chemical 2 of 37 results Aug 17, 2010 Aug 17, 2010
Radium-228 4030 Radionuclide 1 of 11 results Jun 9, 2020 Jun 9, 2020
Cadmium 1015 Inorganic Chemical 1 of 27 results Apr 11, 2005 Apr 11, 2005

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 171–180 of 297 samples, newest first — collected July 9, 2012 to June 13, 2013. The summary above covers all 297.

66 results from the 10 samples listed here: 14 detected, 52 not detected. Across the whole record it is 324 of 1,587. 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 Randolph Water Association #1, every result from 171 to 180 of 297 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
Jun 13, 2013 03:00
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
130614-006VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 13, 2013 03:00, sampling point TF101 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 13, 2013 03:00, sampling point TF101 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 13, 2013 03:00, sampling point TF101 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 13, 2013 03:00, sampling point TF101 Dichloromethane 2964 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 13, 2013 03:00, sampling point TF101 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 13, 2013 03:00, sampling point TF101 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 13, 2013 03:00, sampling point TF101 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 13, 2013 03:00, sampling point TF101 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 13, 2013 03:00, sampling point TF101 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 13, 2013 03:00, sampling point TF101 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 13, 2013 03:00, sampling point TF101 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 13, 2013 03:00, sampling point TF101 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 13, 2013 03:00, sampling point TF101 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 13, 2013 03:00, sampling point TF101 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 13, 2013 03:00, sampling point TF101 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 13, 2013 03:00, sampling point TF101 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 13, 2013 03:00, sampling point TF101 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 13, 2013 03:00, sampling point TF101 Benzene 2990 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 13, 2013 03:00, sampling point TF101 Toluene 2991 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 13, 2013 03:00, sampling point TF101 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 13, 2013 03:00, sampling point TF101 Styrene 2996 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Collected
May 6, 2013 03:00
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
130507-033IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 6, 2013 03:00, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.0938 mg/l , sample collected May 6, 2013 03:00, sampling point TF101 Barium 1010 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 6, 2013 03:00, sampling point TF101 Cadmium 1015 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 6, 2013 03:00, sampling point TF101 Chromium 1020 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.156 mg/l , sample collected May 6, 2013 03:00, sampling point TF101 Fluoride 1025 EPA method 300.0 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 6, 2013 03:00, sampling point TF101 Mercury 1035 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.0023 mg/l , sample collected May 6, 2013 03:00, sampling point TF101 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected May 6, 2013 03:00, sampling point TF101 Selenium 1045 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 6, 2013 03:00, sampling point TF101 Antimony, Total 1074 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 6, 2013 03:00, sampling point TF101 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 6, 2013 03:00, sampling point TF101 Thallium, Total 1085 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Collected
May 6, 2013 03:00
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
130507-032IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 6, 2013 03:00, sampling point TF102 Arsenic 1005 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.0913 mg/l , sample collected May 6, 2013 03:00, sampling point TF102 Barium 1010 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 6, 2013 03:00, sampling point TF102 Cadmium 1015 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 6, 2013 03:00, sampling point TF102 Chromium 1020 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.156 mg/l , sample collected May 6, 2013 03:00, sampling point TF102 Fluoride 1025 EPA method 300.0 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 6, 2013 03:00, sampling point TF102 Mercury 1035 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.0027 mg/l , sample collected May 6, 2013 03:00, sampling point TF102 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected May 6, 2013 03:00, sampling point TF102 Selenium 1045 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 6, 2013 03:00, sampling point TF102 Antimony, Total 1074 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 6, 2013 03:00, sampling point TF102 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 6, 2013 03:00, sampling point TF102 Thallium, Total 1085 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Collected
Mar 11, 2013 03:00
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
130312-066NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 11, 2013 03:00, sampling point TF102 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 11, 2013 03:00, sampling point TF102 Nitrate 1040 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 11, 2013 03:00, sampling point TF102 Nitrite 1041 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Collected
Mar 11, 2013 03:00
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
130312-065NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 11, 2013 03:00, sampling point TF101 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 11, 2013 03:00, sampling point TF101 Nitrate 1040 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 11, 2013 03:00, sampling point TF101 Nitrite 1041 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Collected
Oct 8, 2012 08:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
201210090356
Laboratory
Eurofins Eaton Analytical
Not detected below 1.8 mfl Minimum Reporting Level , sample collected Oct 8, 2012 08:00, sampling point DS000 Asbestos 1094 EPA method 100.2 Jan 1, 2011 – Dec 31, 2019
Collected
Jul 10, 2012 03:00
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
201211120030
Laboratory
Radiation Safety Engineering
0.4 pci/l , sample collected Jul 10, 2012 03:00, sampling point TF102 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.4 pci/l Minimum Reporting Level , sample collected Jul 10, 2012 03:00, sampling point TF102 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.327 pci/l Minimum Reporting Level , sample collected Jul 10, 2012 03:00, sampling point TF102 Radium-226 4020 EPA method 903.1 Jul 1, 2012 – Sep 30, 2012
Not detected below 0.4 pci/l Minimum Reporting Level , sample collected Jul 10, 2012 03:00, sampling point TF102 Radium-228 4030 EPA method 904.0 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 10, 2012 03:30
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
201211120029
Laboratory
Radiation Safety Engineering
0.7 pci/l , sample collected Jul 10, 2012 03:30, sampling point TF101 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
0.3 pci/l , sample collected Jul 10, 2012 03:30, sampling point TF101 Combined Radium (-226 & -228) 4010 Not recorded
0.3 pci/l , sample collected Jul 10, 2012 03:30, sampling point TF101 Radium-226 4020 EPA method 903.1 Jul 1, 2012 – Sep 30, 2012
Not detected below 0.36 pci/l Minimum Reporting Level , sample collected Jul 10, 2012 03:30, sampling point TF101 Radium-228 4030 EPA method 904.0 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 9, 2012 15:00
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
120710-066
Laboratory
Radiation Safety Engineering
0.4 pci/l , sample collected Jul 9, 2012 15:00, sampling point TF102 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.4 pci/l Minimum Reporting Level , sample collected Jul 9, 2012 15:00, sampling point TF102 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.327 pci/l Minimum Reporting Level , sample collected Jul 9, 2012 15:00, sampling point TF102 Radium-226 4020 EPA method 903.1 Jul 1, 2012 – Sep 30, 2012
Not detected below 0.4 pci/l Minimum Reporting Level , sample collected Jul 9, 2012 15:00, sampling point TF102 Radium-228 4030 EPA method 904.0 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 9, 2012 15:00
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
120710-065
Laboratory
Radiation Safety Engineering
0.7 pci/l , sample collected Jul 9, 2012 15:00, sampling point TF101 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
0.3 pci/l , sample collected Jul 9, 2012 15:00, sampling point TF101 Combined Radium (-226 & -228) 4010 Not recorded
0.3 pci/l , sample collected Jul 9, 2012 15:00, sampling point TF101 Radium-226 4020 EPA method 903.1 Jul 1, 2012 – Sep 30, 2012
Not detected below 0.36 pci/l Minimum Reporting Level , sample collected Jul 9, 2012 15:00, sampling point TF101 Radium-228 4030 EPA method 904.0 Jul 1, 2012 – Sep 30, 2012

Routine (10).