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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.

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

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 337 samples, newest first — collected June 21, 2022 to October 26, 2023. The summary above covers all 337.

64 results from the 10 samples listed here: 9 detected, 55 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.

Chemical and radiological sample results for Marydell Water Association, every result from 31 to 40 of 337 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 26, 2023 13:00
Sampling point
TF103
Sample type
Routine
Lab sample
IN-231027-010
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 26, 2023 13:00, sampling point TF103 Arsenic 1005 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
0.0097 mg/l , sample collected Oct 26, 2023 13:00, sampling point TF103 Barium 1010 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 26, 2023 13:00, sampling point TF103 Cadmium 1015 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 26, 2023 13:00, sampling point TF103 Chromium 1020 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
0.161 mg/l , sample collected Oct 26, 2023 13:00, sampling point TF103 Fluoride 1025 EPA method QC 10-109-12-2-A Jan 1, 2021 – Dec 31, 2023
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 26, 2023 13:00, sampling point TF103 Mercury 1035 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 26, 2023 13:00, sampling point TF103 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Oct 26, 2023 13:00, sampling point TF103 Selenium 1045 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 26, 2023 13:00, sampling point TF103 Antimony, Total 1074 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 26, 2023 13:00, sampling point TF103 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 26, 2023 13:00, sampling point TF103 Thallium, Total 1085 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Aug 30, 2023 14:00
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
TH-230831-016
Laboratory
MSDH Lab
23.6 ug/l , sample collected Aug 30, 2023 14:00, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2023 – Dec 31, 2023
Collected
Aug 30, 2023 14:00
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
HA-230831-016
Laboratory
MSDH Lab
8.47 ug/l , sample collected Aug 30, 2023 14:00, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2023 – Dec 31, 2023
Collected
Jul 18, 2023 14:00
Sampling point
TF103
Sample type
Routine
Lab sample
CN-230719-001
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Jul 18, 2023 14:00, sampling point TF103 Cyanide 1024 EPA method QC10204001X Jan 1, 2021 – Dec 31, 2023
Collected
Jun 12, 2023 11:10
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
HA-230613-003
Laboratory
MSDH Lab
4.34 ug/l , sample collected Jun 12, 2023 11:10, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Not recorded
Collected
Apr 3, 2023 14:15
Sampling point
TF103
Sample type
Routine
Lab sample
NI-230404-008
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 3, 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 Apr 3, 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 Apr 3, 2023 14:15, sampling point TF103 Nitrite 1041 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Collected
Apr 3, 2023 14:00
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
NI-230404-007
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 3, 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 Apr 3, 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 Apr 3, 2023 14:00, sampling point TF101 Nitrite 1041 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Collected
Sep 21, 2022 11:00
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
IN-220922-004
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 21, 2022 11:00, sampling point TF102 Arsenic 1005 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.0091 mg/l , sample collected Sep 21, 2022 11:00, 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 Sep 21, 2022 11:00, 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 Sep 21, 2022 11:00, sampling point TF102 Chromium 1020 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.12 mg/l , sample collected Sep 21, 2022 11:00, 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 Sep 21, 2022 11:00, sampling point TF102 Mercury 1035 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 21, 2022 11:00, sampling point TF102 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Sep 21, 2022 11:00, 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 Sep 21, 2022 11:00, 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 Sep 21, 2022 11:00, 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 Sep 21, 2022 11:00, sampling point TF102 Thallium, Total 1085 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Collected
Sep 21, 2022 11:15
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
IN-220922-003
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 21, 2022 11:15, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.0094 mg/l , sample collected Sep 21, 2022 11:15, 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 Sep 21, 2022 11:15, 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 Sep 21, 2022 11:15, sampling point TF101 Chromium 1020 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.114 mg/l , sample collected Sep 21, 2022 11:15, 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 Sep 21, 2022 11:15, sampling point TF101 Mercury 1035 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 21, 2022 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 Sep 21, 2022 11:15, 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 Sep 21, 2022 11:15, 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 Sep 21, 2022 11:15, 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 Sep 21, 2022 11:15, sampling point TF101 Thallium, Total 1085 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Collected
Jun 21, 2022 13:20
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
VO-220622-035
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2022 13:20, sampling point TF102 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2022 13:20, sampling point TF102 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2022 13:20, sampling point TF102 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2022 13:20, sampling point TF102 Dichloromethane 2964 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2022 13:20, sampling point TF102 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2022 13:20, sampling point TF102 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2022 13:20, sampling point TF102 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2022 13:20, sampling point TF102 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2022 13:20, sampling point TF102 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2022 13:20, sampling point TF102 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2022 13:20, sampling point TF102 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2022 13:20, sampling point TF102 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2022 13:20, sampling point TF102 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2022 13:20, sampling point TF102 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2022 13:20, sampling point TF102 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2022 13:20, sampling point TF102 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2022 13:20, sampling point TF102 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2022 13:20, sampling point TF102 Benzene 2990 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2022 13:20, sampling point TF102 Toluene 2991 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2022 13:20, sampling point TF102 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2022 13:20, sampling point TF102 Styrene 2996 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022

Routine (10).