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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

MS0400016 , Marydell Water Association

37 of the 72 analytes this system has been tested for have been detected at least once, across 337 samples on record.

The other 35 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 337 samples on record, detections range from October 1, 2003 to December 8, 2025. These figures cover the whole record; the list of samples further down is narrowed.

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 Marydell Water Association, 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 123 of 123 results Aug 16, 2007 Oct 7, 2020
Lead 1030 Inorganic Chemical 63 of 123 results Aug 16, 2007 Oct 6, 2020
Barium 1010 Inorganic Chemical 27 of 27 results Oct 1, 2003 Mar 11, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 21 of 24 results Sep 30, 2009 Dec 8, 2025
TTHM 2950 Organic Chemical 21 of 23 results Jul 7, 2004 Dec 8, 2025
Chloroform 2941 Organic Chemical 15 of 18 results Jul 25, 2013 Dec 8, 2025
Bromodichloromethane 2943 Organic Chemical 15 of 18 results Jul 25, 2013 Dec 8, 2025
Dibromochloromethane 2944 Organic Chemical 15 of 18 results Jul 25, 2013 Dec 8, 2025
Chromium 1020 Inorganic Chemical 15 of 27 results Oct 1, 2003 Mar 11, 2025
Gross Alpha, Incl. Radon & U 4002 Radionuclide 15 of 15 results Mar 8, 2012 Oct 11, 2012
Dichloroacetic Acid 2451 Organic Chemical 14 of 18 results Jul 25, 2013 Dec 8, 2025
Trichloroacetic Acid 2452 Organic Chemical 13 of 18 results Jul 25, 2013 Dec 8, 2025
Bromoform 2942 Organic Chemical 13 of 18 results Jul 25, 2013 Dec 8, 2025
Sodium 1052 Inorganic Chemical 12 of 12 results Sep 24, 2019 Feb 19, 2025
Dibromoacetic Acid 2454 Organic Chemical 10 of 18 results Jul 25, 2013 Dec 8, 2025
Fluoride 1025 Inorganic Chemical 9 of 30 results May 10, 2017 Mar 11, 2025
Nickel 1036 Inorganic Chemical 7 of 27 results Oct 1, 2003 Mar 11, 2025
Sulfate 1055 Inorganic Chemical 7 of 7 results Oct 1, 2003 Dec 11, 2020
Calcium 1016 Inorganic Chemical 3 of 3 results Dec 11, 2020 Dec 11, 2020
Chloride 1017 Inorganic Chemical 3 of 3 results Dec 11, 2020 Dec 11, 2020
Iron 1028 Inorganic Chemical 3 of 3 results Dec 11, 2020 Dec 11, 2020
Magnesium 1031 Inorganic Chemical 3 of 3 results Dec 11, 2020 Dec 11, 2020
Manganese 1032 Inorganic Chemical 3 of 3 results Dec 11, 2020 Dec 11, 2020
Potassium 1042 Inorganic Chemical 3 of 3 results Dec 11, 2020 Dec 11, 2020
Residue, Total, Filterable 1057 Water Quality 3 of 3 results Dec 11, 2020 Dec 11, 2020
Alkalinity, Caco3 Stability 1067 Water Quality 3 of 3 results Dec 11, 2020 Dec 11, 2020
Carbon Dioxide 1901 Water Quality 3 of 3 results Dec 11, 2020 Dec 11, 2020
Color 1905 Water Quality 3 of 3 results Dec 11, 2020 Dec 11, 2020
Hardness, Total (As Caco3) 1915 Water Quality 3 of 3 results Dec 11, 2020 Dec 11, 2020
Alkalinity, Total 1927 Water Quality 3 of 3 results Dec 11, 2020 Dec 11, 2020
Iron, Field Result FEFD Inorganic Chemical 3 of 3 results Dec 11, 2020 Dec 11, 2020
Calculated Sodium NACA Water Quality 3 of 3 results Dec 11, 2020 Dec 11, 2020
PH, Field Result PHFD Water Quality 3 of 3 results Dec 11, 2020 Dec 11, 2020
Monobromoacetic Acid 2453 Organic Chemical 2 of 18 results Jul 6, 2015 Sep 24, 2019
Xylenes, Total 2955 Organic Chemical 2 of 25 results Mar 5, 2009 May 11, 2009
Dichloromethane 2964 Organic Chemical 2 of 25 results Aug 12, 2004 Aug 12, 2004
Arsenic 1005 Inorganic Chemical 1 of 27 results Apr 2, 2014 Apr 2, 2014

Showing samples collected between September 26, 2024 and September 26, 2026. That is this page’s default, not a limit on what the agency records.

Show every sample on record

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The most recent samples, result by result

The table below lists 11–20 of 24 samples, newest first — collected February 19, 2025 to May 12, 2025. The summary above covers all 24.

64 results from the 10 samples listed here: 31 detected, 33 not detected. Across the whole record it is 467 of 1,623. 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 2 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 Marydell Water Association, every result from 11 to 20 of 24 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
May 12, 2025 12:15
Sampling point
SM1 Location withheld
Sample type
Routine
Lab sample
810-148401-1
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected May 12, 2025 12:15, sampling point SM1 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
2.1 ug/l , sample collected May 12, 2025 12:15, sampling point SM1 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
1.1 ug/l , sample collected May 12, 2025 12:15, sampling point SM1 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected May 12, 2025 12:15, sampling point SM1 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
2.5 ug/l , sample collected May 12, 2025 12:15, sampling point SM1 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
5.7 ug/l , sample collected May 12, 2025 12:15, sampling point SM1 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Apr 1, 2025 – Jun 30, 2025
5.2 ug/l , sample collected May 12, 2025 12:15, sampling point SM1 Chloroform 2941 EPA method 524.2 Not recorded
2.9 ug/l , sample collected May 12, 2025 12:15, sampling point SM1 Bromoform 2942 EPA method 524.2 Not recorded
8.4 ug/l , sample collected May 12, 2025 12:15, sampling point SM1 Bromodichloromethane 2943 EPA method 524.2 Not recorded
11 ug/l , sample collected May 12, 2025 12:15, sampling point SM1 Dibromochloromethane 2944 EPA method 524.2 Not recorded
27.5 ug/l , sample collected May 12, 2025 12:15, sampling point SM1 TTHM 2950 EPA method 524.2 Apr 1, 2025 – Jun 30, 2025
Collected
Apr 22, 2025 13:00
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
NI-250423-011
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 22, 2025 13:00, sampling point TF101 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Apr 22, 2025 13:00, sampling point TF101 Nitrate 1040 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 22, 2025 13:00, sampling point TF101 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Collected
Mar 11, 2025 11:20
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
IN-250312-057
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 11, 2025 11:20, sampling point TF102 Arsenic 1005 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.0086 mg/l , sample collected Mar 11, 2025 11:20, sampling point TF102 Barium 1010 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 11, 2025 11:20, sampling point TF102 Cadmium 1015 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 11, 2025 11:20, sampling point TF102 Chromium 1020 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.113 mg/l , sample collected Mar 11, 2025 11:20, sampling point TF102 Fluoride 1025 EPA method QC 10-109-12-2-A Jan 1, 2023 – Dec 31, 2025
0.0022 mg/l , sample collected Mar 11, 2025 11:20, sampling point TF102 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Mar 11, 2025 11:20, sampling point TF102 Selenium 1045 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 11, 2025 11:20, sampling point TF102 Antimony, Total 1074 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 11, 2025 11:20, sampling point TF102 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 11, 2025 11:20, sampling point TF102 Thallium, Total 1085 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Mar 11, 2025 11:15
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
IN-250312-056
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 11, 2025 11:15, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.0093 mg/l , sample collected Mar 11, 2025 11:15, sampling point TF101 Barium 1010 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 11, 2025 11:15, sampling point TF101 Cadmium 1015 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.0005 mg/l , sample collected Mar 11, 2025 11:15, sampling point TF101 Chromium 1020 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.108 mg/l , sample collected Mar 11, 2025 11:15, sampling point TF101 Fluoride 1025 EPA method QC 10-109-12-2-A Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 11, 2025 11:15, sampling point TF101 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Mar 11, 2025 11:15, sampling point TF101 Selenium 1045 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 11, 2025 11:15, sampling point TF101 Antimony, Total 1074 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 11, 2025 11:15, sampling point TF101 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 11, 2025 11:15, sampling point TF101 Thallium, Total 1085 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Mar 11, 2025 11:20
Sampling point
TF103
Sample type
Routine
Lab sample
NI-250312-002
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 11, 2025 11:20, sampling point TF103 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 11, 2025 11:20, sampling point TF103 Nitrate 1040 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 11, 2025 11:20, sampling point TF103 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Collected
Mar 11, 2025 11:10
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
NI-250312-001
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 11, 2025 11:10, sampling point TF102 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 11, 2025 11:10, sampling point TF102 Nitrate 1040 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 11, 2025 11:10, sampling point TF102 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Collected
Mar 11, 2025 09:30
Sampling point
SM2 Location withheld
Sample type
Routine
Lab sample
810-141092-2
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Mar 11, 2025 09:30, sampling point SM2 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Mar 11, 2025 09:30, sampling point SM2 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Mar 11, 2025 09:30, sampling point SM2 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Mar 11, 2025 09:30, sampling point SM2 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Mar 11, 2025 09:30, sampling point SM2 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 2 ug/l Minimum Reporting Level , sample collected Mar 11, 2025 09:30, sampling point SM2 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2025 – Mar 31, 2025
3.1 ug/l , sample collected Mar 11, 2025 09:30, sampling point SM2 Chloroform 2941 EPA method 524.2 Not recorded
1.4 ug/l , sample collected Mar 11, 2025 09:30, sampling point SM2 Bromoform 2942 EPA method 524.2 Not recorded
2.9 ug/l , sample collected Mar 11, 2025 09:30, sampling point SM2 Bromodichloromethane 2943 EPA method 524.2 Not recorded
3.4 ug/l , sample collected Mar 11, 2025 09:30, sampling point SM2 Dibromochloromethane 2944 EPA method 524.2 Not recorded
10.8 ug/l , sample collected Mar 11, 2025 09:30, sampling point SM2 TTHM 2950 EPA method 524.2 Jan 1, 2025 – Mar 31, 2025
Collected
Mar 11, 2025 09:00
Sampling point
SM1 Location withheld
Sample type
Routine
Lab sample
810-141092-1
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Mar 11, 2025 09:00, sampling point SM1 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
4.4 ug/l , sample collected Mar 11, 2025 09:00, sampling point SM1 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
15 ug/l , sample collected Mar 11, 2025 09:00, sampling point SM1 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Mar 11, 2025 09:00, sampling point SM1 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
1.6 ug/l , sample collected Mar 11, 2025 09:00, sampling point SM1 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
21 ug/l , sample collected Mar 11, 2025 09:00, sampling point SM1 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2025 – Mar 31, 2025
3.4 ug/l , sample collected Mar 11, 2025 09:00, sampling point SM1 Chloroform 2941 EPA method 524.2 Not recorded
1.5 ug/l , sample collected Mar 11, 2025 09:00, sampling point SM1 Bromoform 2942 EPA method 524.2 Not recorded
3.1 ug/l , sample collected Mar 11, 2025 09:00, sampling point SM1 Bromodichloromethane 2943 EPA method 524.2 Not recorded
3.4 ug/l , sample collected Mar 11, 2025 09:00, sampling point SM1 Dibromochloromethane 2944 EPA method 524.2 Not recorded
11.4 ug/l , sample collected Mar 11, 2025 09:00, sampling point SM1 TTHM 2950 EPA method 524.2 Jan 1, 2025 – Mar 31, 2025
Collected
Feb 19, 2025 14:30
Sampling point
TF103
Sample type
Routine
Lab sample
NA-250220-006
Laboratory
MSDH Lab
104 mg/l , sample collected Feb 19, 2025 14:30, sampling point TF103 Sodium 1052 EPA method 200.7 Jan 1, 2023 – Dec 31, 2025
Collected
Feb 19, 2025 14:15
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
NA-250220-005
Laboratory
MSDH Lab
106 mg/l , sample collected Feb 19, 2025 14:15, sampling point TF102 Sodium 1052 EPA method 200.7 Jan 1, 2023 – Dec 31, 2025

Routine (10).