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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 81–90 of 256 samples, newest first — collected April 13, 2016 to July 6, 2017. The summary above covers all 256.

56 results from the 10 samples listed here: 42 detected, 14 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 81 to 90 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 6, 2017 09:20
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
170707-165PB
Laboratory
MSDH Lab
0.0544 mg/l , sample collected Jul 6, 2017 09:20, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 6, 2017 09:20, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Collected
Jul 6, 2017
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
170707-164PB
Laboratory
MSDH Lab
0.0576 mg/l , sample collected Jul 6, 2017, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
0.0011 mg/l , sample collected Jul 6, 2017, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Collected
Jul 6, 2017 08:56
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
170707-162PB
Laboratory
MSDH Lab
0.081 mg/l , sample collected Jul 6, 2017 08:56, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
0.0006 mg/l , sample collected Jul 6, 2017 08:56, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Collected
Jul 6, 2017 08:22
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
170707-161PB
Laboratory
MSDH Lab
0.0519 mg/l , sample collected Jul 6, 2017 08:22, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
0.0007 mg/l , sample collected Jul 6, 2017 08:22, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Collected
May 25, 2017
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
170531-002PC
Laboratory
MSDH Lab
2.8428 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point DS000 Calcium 1016 EPA method 200.8 Not recorded
5.891 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point DS000 Chloride 1017 EPA method 300.0 Not recorded
0.062 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point DS000 Fluoride 1025 EPA method 380-75WE Not recorded
0.054 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point DS000 Iron 1028 EPA method 200.8 Not recorded
0.6712 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point DS000 Magnesium 1031 EPA method 200.8 Not recorded
0.0011 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point DS000 Manganese 1032 EPA method 200.8 Not recorded
3.2027 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point DS000 Potassium 1042 EPA method 200.8 Not recorded
89.6602 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point DS000 Sodium 1052 EPA method 200.8 Not recorded
18.639 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point DS000 Sulfate 1055 EPA method 300.0 Not recorded
221 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point DS000 Residue, Total, Filterable 1057 EPA method CALCUL LAB Not recorded
6.28 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point DS000 Alkalinity, Caco3 Stability 1067 EPA method 2320B Not recorded
0 mg/l This result is recorded as a detection, and the figure the agency wrote — "0" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here. The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point DS000 Carbon Dioxide 1901 EPA method CALCUL LAB Not recorded
5 units The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point DS000 Color 1905 EPA method 2120B Not recorded
9.9 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point DS000 Hardness, Total (As Caco3) 1915 EPA method CALCUL LAB Not recorded
178 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point DS000 Alkalinity, Total 1927 EPA method 2320B Not recorded
0 mg/l This result is recorded as a detection, and the figure the agency wrote — "0.0" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here. The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point DS000 Iron, Field Result FEFD EPA method 3500AL-D Not recorded
88.3 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point DS000 Calculated Sodium NACA EPA method CALCUL LAB Not recorded
7.5 ph The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point DS000 PH, Field Result PHFD EPA method 3500AL-D Not recorded
Collected
May 25, 2017
Sampling point
WL002 Well W002
Sample type
Routine
Lab sample
170531-001PC
Laboratory
MSDH Lab
3.2412 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point WL002 Calcium 1016 EPA method 200.8 Not recorded
4.289 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point WL002 Chloride 1017 EPA method 300.0 Not recorded
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected May 25, 2017, sampling point WL002 Fluoride 1025 EPA method 380-75WE Not recorded
0.0756 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point WL002 Iron 1028 EPA method 200.8 Not recorded
0.9436 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point WL002 Magnesium 1031 EPA method 200.8 Not recorded
0.0006 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point WL002 Manganese 1032 EPA method 200.8 Not recorded
4.683 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point WL002 Potassium 1042 EPA method 200.8 Not recorded
90.4363 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point WL002 Sodium 1052 EPA method 200.8 Not recorded
17.924 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point WL002 Sulfate 1055 EPA method 300.0 Not recorded
219 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point WL002 Residue, Total, Filterable 1057 EPA method CALCUL LAB Not recorded
7.01 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point WL002 Alkalinity, Caco3 Stability 1067 EPA method 2320B Not recorded
0 mg/l This result is recorded as a detection, and the figure the agency wrote — "0" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here. The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point WL002 Carbon Dioxide 1901 EPA method CALCUL LAB Not recorded
5 units The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point WL002 Color 1905 EPA method 2120B Not recorded
11.7 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point WL002 Hardness, Total (As Caco3) 1915 EPA method CALCUL LAB Not recorded
177 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point WL002 Alkalinity, Total 1927 EPA method 2320B Not recorded
0 mg/l This result is recorded as a detection, and the figure the agency wrote — "0.0" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here. The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point WL002 Iron, Field Result FEFD EPA method 3500AL-D Not recorded
84.4 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point WL002 Calculated Sodium NACA EPA method CALCUL LAB Not recorded
7.9 ph The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 25, 2017, sampling point WL002 PH, Field Result PHFD EPA method 3500AL-D Not recorded
Collected
Feb 21, 2017 14:30
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
170222-059NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 21, 2017 14:30, sampling point TF101 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2017 – Dec 31, 2017
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Feb 21, 2017 14:30, sampling point TF101 Nitrate 1040 EPA method QC10107041C Jan 1, 2017 – Dec 31, 2017
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 21, 2017 14:30, sampling point TF101 Nitrite 1041 EPA method QC10107041C Jan 1, 2017 – Dec 31, 2017
Collected
Feb 21, 2017 14:30
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
170222-058NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 21, 2017 14:30, sampling point TF102 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2017 – Dec 31, 2017
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Feb 21, 2017 14:30, sampling point TF102 Nitrate 1040 EPA method QC10107041C Jan 1, 2017 – Dec 31, 2017
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 21, 2017 14:30, sampling point TF102 Nitrite 1041 EPA method QC10107041C Jan 1, 2017 – Dec 31, 2017
Collected
Apr 13, 2016 13:00
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
160414-023NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 13, 2016 13:00, sampling point TF102 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2016 – Dec 31, 2016
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Apr 13, 2016 13:00, sampling point TF102 Nitrate 1040 EPA method QC10107041C Jan 1, 2016 – Dec 31, 2016
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 13, 2016 13:00, sampling point TF102 Nitrite 1041 EPA method QC10107041C Jan 1, 2016 – Dec 31, 2016
Collected
Apr 13, 2016 13:00
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
160414-021NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 13, 2016 13:00, sampling point TF101 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2016 – Dec 31, 2016
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Apr 13, 2016 13:00, sampling point TF101 Nitrate 1040 EPA method QC10107041C Jan 1, 2016 – Dec 31, 2016
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 13, 2016 13:00, sampling point TF101 Nitrite 1041 EPA method QC10107041C Jan 1, 2016 – Dec 31, 2016

Routine (10).