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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

MS0780010 , Tomnolen Water Assn, Inc

33 of the 72 analytes this system has been tested for have been detected at least once, across 199 samples on record.

The other 39 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 199 samples on record, detections range from November 3, 2003 to July 20, 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 Tomnolen Water Assn, Inc, 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 60 of 60 results Aug 30, 2007 Aug 15, 2023
Barium 1010 Inorganic Chemical 15 of 15 results Nov 3, 2003 Apr 2, 2025
Fluoride 1025 Inorganic Chemical 11 of 16 results Nov 3, 2003 Apr 2, 2025
Chromium 1020 Inorganic Chemical 11 of 15 results Nov 3, 2003 May 21, 2019
TTHM 2950 Organic Chemical 10 of 19 results Oct 29, 2007 Dec 16, 2025
Sodium 1052 Inorganic Chemical 7 of 7 results Dec 20, 2006 Jul 20, 2026
Lead 1030 Inorganic Chemical 7 of 60 results Aug 30, 2007 Sep 3, 2020
Dibromochloromethane 2944 Organic Chemical 5 of 14 results Oct 29, 2007 Dec 16, 2025
Gross Alpha, Incl. Radon & U 4002 Radionuclide 5 of 10 results Dec 8, 2011 Jul 13, 2012
Chloroform 2941 Organic Chemical 4 of 14 results Oct 31, 2013 Dec 16, 2025
Bromodichloromethane 2943 Organic Chemical 4 of 14 results Oct 27, 2020 Dec 16, 2025
Nickel 1036 Inorganic Chemical 4 of 15 results Apr 5, 2004 Apr 2, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 4 of 19 results Aug 2, 2010 Jul 30, 2024
Sulfate 1055 Inorganic Chemical 3 of 3 results Nov 3, 2003 Dec 20, 2006
Bromoform 2942 Organic Chemical 2 of 14 results Oct 29, 2007 Oct 20, 2025
Selenium 1045 Inorganic Chemical 2 of 15 results May 2, 2005 Mar 1, 2010
Monobromoacetic Acid 2453 Organic Chemical 1 of 13 results Oct 27, 2020 Oct 27, 2020
Calcium 1016 Inorganic Chemical 1 of 1 result Dec 20, 2006 Dec 20, 2006
Chloride 1017 Inorganic Chemical 1 of 1 result Dec 20, 2006 Dec 20, 2006
Iron 1028 Inorganic Chemical 1 of 1 result Dec 20, 2006 Dec 20, 2006
Magnesium 1031 Inorganic Chemical 1 of 1 result Dec 20, 2006 Dec 20, 2006
Manganese 1032 Inorganic Chemical 1 of 1 result Dec 20, 2006 Dec 20, 2006
Potassium 1042 Inorganic Chemical 1 of 1 result Dec 20, 2006 Dec 20, 2006
Residue, Total, Filterable 1057 Water Quality 1 of 1 result Dec 20, 2006 Dec 20, 2006
Carbon Dioxide 1901 Water Quality 1 of 1 result Dec 20, 2006 Dec 20, 2006
Color 1905 Water Quality 1 of 1 result Dec 20, 2006 Dec 20, 2006
Hardness, Total (As Caco3) 1915 Water Quality 1 of 1 result Dec 20, 2006 Dec 20, 2006
PH 1925 Water Quality 1 of 1 result Dec 20, 2006 Dec 20, 2006
Alkalinity, Total 1927 Water Quality 1 of 1 result Dec 20, 2006 Dec 20, 2006
Iron, Field Result FEFD Inorganic Chemical 1 of 1 result Dec 20, 2006 Dec 20, 2006
Calculated Sodium NACA Water Quality 1 of 1 result Dec 20, 2006 Dec 20, 2006
PH, Field Result PHFD Water Quality 1 of 1 result Dec 20, 2006 Dec 20, 2006
Cadmium 1015 Inorganic Chemical 1 of 15 results May 2, 2005 May 2, 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 21–30 of 199 samples, newest first — collected August 15, 2023 to July 30, 2024. The summary above covers all 199.

19 results from the 10 samples listed here: 7 detected, 12 not detected. Across the whole record it is 171 of 1,020. 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 5 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.

Chemical and radiological sample results for Tomnolen Water Assn, Inc, every result from 21 to 30 of 199 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, 2024 15:15
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
TH-240731-017
Laboratory
MSDH Lab
3.41 ug/l , sample collected Jul 30, 2024 15:15, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2024 – Dec 31, 2024
Collected
Apr 23, 2024 14:10
Sampling point
TF102 Tment Plant T102
Sample type
Routine
Lab sample
NI-240424-051
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 23, 2024 14:10, sampling point TF102 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Apr 23, 2024 14:10, sampling point TF102 Nitrate 1040 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 23, 2024 14:10, sampling point TF102 Nitrite 1041 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Collected
Apr 23, 2024 13:50
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
NI-240424-050
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 23, 2024 13:50, sampling point TF101 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Apr 23, 2024 13:50, sampling point TF101 Nitrate 1040 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 23, 2024 13:50, sampling point TF101 Nitrite 1041 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Collected
Sep 11, 2023 14:00
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
TH-230912-003
Laboratory
MSDH Lab
2.8 ug/l , sample collected Sep 11, 2023 14:00, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2023 – Dec 31, 2023
Collected
Sep 11, 2023 14:05
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
HA-230912-002
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 11, 2023 14:05, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2023 – Dec 31, 2023
Collected
Aug 15, 2023 16:15
Sampling point
LC0012 Location withheld
Sample type
Routine
Lab sample
PB-230817-050
Laboratory
MSDH Lab
0.248 mg/l , sample collected Aug 15, 2023 16:15, sampling point LC0012 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 15, 2023 16:15, sampling point LC0012 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Aug 15, 2023 04:00
Sampling point
LC0011 Location withheld
Sample type
Routine
Lab sample
PB-230817-049
Laboratory
MSDH Lab
0.0967 mg/l , sample collected Aug 15, 2023 04:00, sampling point LC0011 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 15, 2023 04:00, sampling point LC0011 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Aug 15, 2023 05:30
Sampling point
LC0002 Location withheld
Sample type
Routine
Lab sample
PB-230817-048
Laboratory
MSDH Lab
0.121 mg/l , sample collected Aug 15, 2023 05:30, sampling point LC0002 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 15, 2023 05:30, sampling point LC0002 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Aug 15, 2023 06:15
Sampling point
LC0001 Location withheld
Sample type
Routine
Lab sample
PB-230817-047
Laboratory
MSDH Lab
0.18 mg/l , sample collected Aug 15, 2023 06:15, sampling point LC0001 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 15, 2023 06:15, sampling point LC0001 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Aug 15, 2023 08:00
Sampling point
LC0009 Location withheld
Sample type
Routine
Lab sample
PB-230817-046
Laboratory
MSDH Lab
0.427 mg/l , sample collected Aug 15, 2023 08:00, sampling point LC0009 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 15, 2023 08:00, sampling point LC0009 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023

Routine (10).