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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 31–40 of 297 samples, newest first — collected September 6, 2022 to October 23, 2023. The summary above covers all 297.

56 results from the 10 samples listed here: 10 detected, 46 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 31 to 40 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
Oct 23, 2023 13:30
Sampling point
TF103 Treatment Facility TF103
Sample type
Routine
Lab sample
CN-231024-019
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Oct 23, 2023 13:30, sampling point TF103 Cyanide 1024 EPA method QC10204001X Jan 1, 2023 – Dec 31, 2023
Collected
Oct 23, 2023 14:15
Sampling point
TF103 Treatment Facility TF103
Sample type
Routine
Lab sample
NI-231024-012
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Oct 23, 2023 14:15, sampling point TF103 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Oct 23, 2023 14:15, sampling point TF103 Nitrate 1040 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Oct 23, 2023 14:15, sampling point TF103 Nitrite 1041 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Collected
Oct 23, 2023 13:45
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
NI-231024-010
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Oct 23, 2023 13:45, sampling point TF102 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Oct 23, 2023 13:45, sampling point TF102 Nitrate 1040 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Oct 23, 2023 13:45, sampling point TF102 Nitrite 1041 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Collected
Oct 23, 2023 14:00
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
NI-231024-011
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Oct 23, 2023 14:00, sampling point TF101 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Oct 23, 2023 14:00, sampling point TF101 Nitrate 1040 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Oct 23, 2023 14:00, sampling point TF101 Nitrite 1041 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Collected
Aug 16, 2023 14:45
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
HA-230817-012
Laboratory
MSDH Lab
1.77 ug/l , sample collected Aug 16, 2023 14:45, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2023 – Dec 31, 2023
Collected
Aug 16, 2023 14:30
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
TH-230817-017
Laboratory
MSDH Lab
11.2 ug/l , sample collected Aug 16, 2023 14:30, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2023 – Dec 31, 2023
Collected
Nov 30, 2022 13:30
Sampling point
TF103 Treatment Facility TF103
Sample type
Routine
Lab sample
VO-221201-019
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 13:30, sampling point TF103 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 13:30, sampling point TF103 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 13:30, sampling point TF103 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 13:30, sampling point TF103 Dichloromethane 2964 EPA method 524.2 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 13:30, sampling point TF103 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 13:30, sampling point TF103 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 13:30, sampling point TF103 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 13:30, sampling point TF103 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 13:30, sampling point TF103 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 13:30, sampling point TF103 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 13:30, sampling point TF103 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 13:30, sampling point TF103 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 13:30, sampling point TF103 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 13:30, sampling point TF103 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 13:30, sampling point TF103 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 13:30, sampling point TF103 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 13:30, sampling point TF103 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 13:30, sampling point TF103 Benzene 2990 EPA method 524.2 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 13:30, sampling point TF103 Toluene 2991 EPA method 524.2 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 13:30, sampling point TF103 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 13:30, sampling point TF103 Styrene 2996 EPA method 524.2 Jan 1, 2022 – Dec 31, 2024
Collected
Oct 10, 2022 10:30
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
IN-221011-032
Laboratory
MSDH Lab
0.0033 mg/l , sample collected Oct 10, 2022 10:30, sampling point TF102 Arsenic 1005 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.0834 mg/l , sample collected Oct 10, 2022 10:30, sampling point TF102 Barium 1010 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 10, 2022 10:30, sampling point TF102 Cadmium 1015 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 10, 2022 10:30, sampling point TF102 Chromium 1020 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.175 mg/l , sample collected Oct 10, 2022 10:30, sampling point TF102 Fluoride 1025 EPA method QC 10-109-12-2-A Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 10, 2022 10:30, sampling point TF102 Mercury 1035 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.0007 mg/l , sample collected Oct 10, 2022 10:30, sampling point TF102 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Oct 10, 2022 10:30, sampling point TF102 Selenium 1045 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 10, 2022 10:30, sampling point TF102 Antimony, Total 1074 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 10, 2022 10:30, sampling point TF102 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 10, 2022 10:30, sampling point TF102 Thallium, Total 1085 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Collected
Oct 10, 2022 10:00
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
IN-221011-033
Laboratory
MSDH Lab
0.0033 mg/l , sample collected Oct 10, 2022 10:00, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.085 mg/l , sample collected Oct 10, 2022 10:00, sampling point TF101 Barium 1010 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 10, 2022 10:00, sampling point TF101 Cadmium 1015 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 10, 2022 10:00, sampling point TF101 Chromium 1020 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.156 mg/l , sample collected Oct 10, 2022 10:00, sampling point TF101 Fluoride 1025 EPA method QC 10-109-12-2-A Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 10, 2022 10:00, sampling point TF101 Mercury 1035 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.0007 mg/l , sample collected Oct 10, 2022 10:00, sampling point TF101 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Oct 10, 2022 10:00, sampling point TF101 Selenium 1045 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 10, 2022 10:00, sampling point TF101 Antimony, Total 1074 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 10, 2022 10:00, sampling point TF101 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 10, 2022 10:00, sampling point TF101 Thallium, Total 1085 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Collected
Sep 6, 2022 14:30
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
CN-220907-002
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Sep 6, 2022 14:30, sampling point TF101 Cyanide 1024 EPA method QC10204001X Jan 1, 2020 – Dec 31, 2022

Routine (10).