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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

MS0310007 , Louin Water Works

41 of the 72 analytes this system has been tested for have been detected at least once, across 256 samples on record.

The other 31 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 256 samples on record, detections range from November 24, 2003 to September 18, 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 Louin Water Works, 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 Jul 24, 2007 Jul 18, 2023
Lead 1030 Inorganic Chemical 55 of 60 results Jul 24, 2007 Jul 18, 2023
Barium 1010 Inorganic Chemical 19 of 19 results Nov 24, 2003 Feb 25, 2025
TTHM 2950 Organic Chemical 12 of 17 results Jun 20, 2007 Sep 18, 2025
Chromium 1020 Inorganic Chemical 11 of 19 results Mar 11, 2004 Feb 6, 2024
Chloroform 2941 Organic Chemical 9 of 14 results Mar 12, 2024 Sep 18, 2025
Xylenes, Total 2955 Organic Chemical 9 of 62 results Sep 10, 2008 Apr 13, 2021
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 8 of 17 results Jun 20, 2007 Sep 18, 2025
Sodium 1052 Inorganic Chemical 8 of 8 results May 25, 2017 Feb 4, 2025
Sulfate 1055 Inorganic Chemical 6 of 6 results Nov 24, 2003 May 25, 2017
Ethylbenzene 2992 Organic Chemical 5 of 62 results Sep 10, 2008 Mar 4, 2009
Dichloroacetic Acid 2451 Organic Chemical 4 of 13 results Sep 10, 2008 Sep 18, 2025
Fluoride 1025 Inorganic Chemical 4 of 21 results Jan 12, 2009 May 17, 2022
Trichloroacetic Acid 2452 Organic Chemical 3 of 13 results Aug 14, 2024 Sep 18, 2025
Bromodichloromethane 2943 Organic Chemical 3 of 14 results Aug 14, 2024 Sep 18, 2025
Dibromochloromethane 2944 Organic Chemical 3 of 14 results Aug 14, 2024 Sep 18, 2025
Cadmium 1015 Inorganic Chemical 3 of 19 results Nov 24, 2003 Mar 11, 2004
Monochloroacetic Acid 2450 Organic Chemical 2 of 13 results Sep 10, 2008 Aug 7, 2018
Nitrate-Nitrite 1038 Inorganic Chemical 2 of 44 results Feb 20, 2018 Feb 20, 2018
Nitrite 1041 Inorganic Chemical 2 of 44 results Feb 20, 2018 Feb 20, 2018
Calcium 1016 Inorganic Chemical 2 of 2 results May 25, 2017 May 25, 2017
Chloride 1017 Inorganic Chemical 2 of 2 results May 25, 2017 May 25, 2017
Iron 1028 Inorganic Chemical 2 of 2 results May 25, 2017 May 25, 2017
Magnesium 1031 Inorganic Chemical 2 of 2 results May 25, 2017 May 25, 2017
Manganese 1032 Inorganic Chemical 2 of 2 results May 25, 2017 May 25, 2017
Potassium 1042 Inorganic Chemical 2 of 2 results May 25, 2017 May 25, 2017
Residue, Total, Filterable 1057 Water Quality 2 of 2 results May 25, 2017 May 25, 2017
Alkalinity, Caco3 Stability 1067 Water Quality 2 of 2 results May 25, 2017 May 25, 2017
Carbon Dioxide 1901 Water Quality 2 of 2 results May 25, 2017 May 25, 2017
Color 1905 Water Quality 2 of 2 results May 25, 2017 May 25, 2017
Hardness, Total (As Caco3) 1915 Water Quality 2 of 2 results May 25, 2017 May 25, 2017
Alkalinity, Total 1927 Water Quality 2 of 2 results May 25, 2017 May 25, 2017
Iron, Field Result FEFD Inorganic Chemical 2 of 2 results May 25, 2017 May 25, 2017
Calculated Sodium NACA Water Quality 2 of 2 results May 25, 2017 May 25, 2017
PH, Field Result PHFD Water Quality 2 of 2 results May 25, 2017 May 25, 2017
Nickel 1036 Inorganic Chemical 2 of 19 results Mar 11, 2004 Mar 11, 2004
Bromoform 2942 Organic Chemical 1 of 14 results Nov 20, 2024 Nov 20, 2024
Dibromoacetic Acid 2454 Organic Chemical 1 of 13 results Aug 14, 2024 Aug 14, 2024
Cyanide 1024 Inorganic Chemical 1 of 20 results Sep 14, 2009 Sep 14, 2009
Monobromoacetic Acid 2453 Organic Chemical 1 of 13 results Sep 10, 2008 Sep 10, 2008
Selenium 1045 Inorganic Chemical 1 of 19 results Nov 24, 2003 Nov 24, 2003

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 256 samples, newest first — collected March 22, 2022 to July 18, 2023. The summary above covers all 256.

27 results from the 10 samples listed here: 11 detected, 16 not detected. Across the whole record it is 265 of 2,034. 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 4 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 Louin Water Works, every result from 31 to 40 of 256 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 18, 2023 05:46
Sampling point
LC0009 Location withheld
Sample type
Routine
Lab sample
PB-230719-023
Laboratory
MSDH Lab
0.143 mg/l , sample collected Jul 18, 2023 05:46, sampling point LC0009 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
0.8 ug/l , sample collected Jul 18, 2023 05:46, sampling point LC0009 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Jul 18, 2023 06:00
Sampling point
LC0017 Location withheld
Sample type
Routine
Lab sample
PB-230719-022
Laboratory
MSDH Lab
0.0172 mg/l , sample collected Jul 18, 2023 06:00, sampling point LC0017 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
0.5 ug/l , sample collected Jul 18, 2023 06:00, sampling point LC0017 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Jul 18, 2023 06:00
Sampling point
LC0004 Location withheld
Sample type
Routine
Lab sample
PB-230719-021
Laboratory
MSDH Lab
0.0659 mg/l , sample collected Jul 18, 2023 06:00, sampling point LC0004 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
1 ug/l , sample collected Jul 18, 2023 06:00, sampling point LC0004 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
May 9, 2023 15:00
Sampling point
SMD Location withheld
Sample type
Routine
Lab sample
HA-230510-009
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected May 9, 2023 15:00, sampling point SMD Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Not recorded
Collected
May 9, 2023 15:00
Sampling point
SMD Location withheld
Sample type
Routine
Lab sample
TH-230510-009
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected May 9, 2023 15:00, sampling point SMD TTHM 2950 EPA method 524.2 Not recorded
Collected
Feb 22, 2023 12:45
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
NI-230223-040
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 22, 2023 12:45, 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 Feb 22, 2023 12:45, 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 Feb 22, 2023 12:45, sampling point TF102 Nitrite 1041 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Collected
Feb 22, 2023 12:40
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
NI-230223-039
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 22, 2023 12:40, 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 Feb 22, 2023 12:40, 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 Feb 22, 2023 12:40, sampling point TF101 Nitrite 1041 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Collected
May 17, 2022 05:00
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
IN-220518-009
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 17, 2022 05:00, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.0035 mg/l , sample collected May 17, 2022 05:00, 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 May 17, 2022 05:00, sampling point TF101 Cadmium 1015 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.0009 mg/l , sample collected May 17, 2022 05:00, sampling point TF101 Chromium 1020 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.25 mg/l , sample collected May 17, 2022 05:00, 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 May 17, 2022 05:00, 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 May 17, 2022 05:00, sampling point TF101 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected May 17, 2022 05:00, 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 May 17, 2022 05:00, 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 May 17, 2022 05:00, 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 May 17, 2022 05:00, sampling point TF101 Thallium, Total 1085 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Collected
Mar 22, 2022 11:50
Sampling point
SMD Location withheld
Sample type
Routine
Lab sample
HA-220323-006
Laboratory
MSDH Lab
1.29 ug/l , sample collected Mar 22, 2022 11:50, sampling point SMD Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Not recorded
Collected
Mar 22, 2022 11:50
Sampling point
SMD Location withheld
Sample type
Routine
Lab sample
TH-220323-006
Laboratory
MSDH Lab
1.07 ug/l , sample collected Mar 22, 2022 11:50, sampling point SMD TTHM 2950 EPA method 524.2 Not recorded

Routine (10).