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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 161–170 of 256 samples, newest first — collected July 6, 2010 to August 10, 2011. The summary above covers all 256.

24 results from the 10 samples listed here: 12 detected, 12 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.

Chemical and radiological sample results for Louin Water Works, every result from 161 to 170 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
Aug 10, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110811-043PB
Laboratory
MSDH Lab
0.0903 mg/l , sample collected Aug 10, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
0.0012 mg/l , sample collected Aug 10, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Aug 10, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110811-042PB
Laboratory
MSDH Lab
0.099 mg/l , sample collected Aug 10, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
0.0008 mg/l , sample collected Aug 10, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Aug 10, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110811-041PB
Laboratory
MSDH Lab
0.0775 mg/l , sample collected Aug 10, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
0.0013 mg/l , sample collected Aug 10, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Aug 10, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110811-040PB
Laboratory
MSDH Lab
0.294 mg/l , sample collected Aug 10, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
0.001 mg/l , sample collected Aug 10, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Aug 10, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110811-039PB
Laboratory
MSDH Lab
0.1218 mg/l , sample collected Aug 10, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
0.0021 mg/l , sample collected Aug 10, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Aug 10, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110811-038PB
Laboratory
MSDH Lab
0.0863 mg/l , sample collected Aug 10, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
0.0015 mg/l , sample collected Aug 10, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Apr 11, 2011
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
110412-024NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 11, 2011, sampling point TF102 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2011 – Dec 31, 2011
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Apr 11, 2011, sampling point TF102 Nitrate 1040 EPA method 353.2 Jan 1, 2011 – Dec 31, 2011
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 11, 2011, sampling point TF102 Nitrite 1041 EPA method 353.2 Jan 1, 2011 – Dec 31, 2011
Collected
Apr 11, 2011
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
110412-022NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 11, 2011, sampling point TF101 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2011 – Dec 31, 2011
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Apr 11, 2011, sampling point TF101 Nitrate 1040 EPA method 353.2 Jan 1, 2011 – Dec 31, 2011
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 11, 2011, sampling point TF101 Nitrite 1041 EPA method 353.2 Jan 1, 2011 – Dec 31, 2011
Collected
Jul 6, 2010
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
100707-068NI
Laboratory
MSDH Lab
Not detected below 0.25 mg/l Minimum Reporting Level , sample collected Jul 6, 2010, sampling point TF102 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.2 mg/l Minimum Reporting Level , sample collected Jul 6, 2010, sampling point TF102 Nitrate 1040 EPA method 353.2 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Jul 6, 2010, sampling point TF102 Nitrite 1041 EPA method 353.2 Jan 1, 2010 – Dec 31, 2010
Collected
Jul 6, 2010
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
100707-067NI
Laboratory
MSDH Lab
Not detected below 0.25 mg/l Minimum Reporting Level , sample collected Jul 6, 2010, sampling point TF101 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.2 mg/l Minimum Reporting Level , sample collected Jul 6, 2010, sampling point TF101 Nitrate 1040 EPA method 353.2 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Jul 6, 2010, sampling point TF101 Nitrite 1041 EPA method 353.2 Jan 1, 2010 – Dec 31, 2010

Routine (10).