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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

MS0620008 , Lake Water Works

36 of the 73 analytes this system has been tested for have been detected at least once, across 281 samples on record.

The other 37 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 281 samples on record, detections range from October 22, 2003 to July 7, 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 Lake 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
Barium 1010 Inorganic Chemical 30 of 30 results Oct 22, 2003 Mar 25, 2025
Copper, Free 1022 Inorganic Chemical 30 of 30 results Jul 19, 2007 Jul 25, 2023
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 19 of 19 results Aug 11, 2004 Jul 7, 2025
TTHM 2950 Organic Chemical 19 of 19 results Aug 11, 2004 Jul 7, 2025
Lead 1030 Inorganic Chemical 19 of 30 results Jul 19, 2007 Jul 25, 2023
Dichloroacetic Acid 2451 Organic Chemical 14 of 14 results Sep 12, 2007 Apr 29, 2025
Trichloroacetic Acid 2452 Organic Chemical 14 of 14 results Sep 12, 2007 Apr 29, 2025
Chloroform 2941 Organic Chemical 14 of 14 results Nov 1, 2007 Apr 29, 2025
Bromodichloromethane 2943 Organic Chemical 13 of 14 results Jul 14, 2010 Apr 29, 2025
Fluoride 1025 Inorganic Chemical 13 of 33 results Nov 1, 2004 Mar 25, 2025
Chromium 1020 Inorganic Chemical 11 of 30 results Mar 24, 2004 Dec 14, 2016
Gross Alpha, Incl. Radon & U 4002 Radionuclide 10 of 10 results Mar 14, 2012 Oct 9, 2012
Sodium 1052 Inorganic Chemical 9 of 9 results Sep 22, 2006 Dec 6, 2023
Sulfate 1055 Inorganic Chemical 6 of 6 results Oct 22, 2003 Sep 22, 2006
Nickel 1036 Inorganic Chemical 4 of 30 results Oct 18, 2010 May 15, 2013
Xylenes, Total 2955 Organic Chemical 4 of 62 results Mar 3, 2004 Jun 6, 2012
Calcium 1016 Inorganic Chemical 3 of 3 results Sep 22, 2006 Sep 22, 2006
Magnesium 1031 Inorganic Chemical 3 of 3 results Sep 22, 2006 Sep 22, 2006
Manganese 1032 Inorganic Chemical 3 of 3 results Sep 22, 2006 Sep 22, 2006
Potassium 1042 Inorganic Chemical 3 of 3 results Sep 22, 2006 Sep 22, 2006
Residue, Total, Filterable 1057 Water Quality 3 of 3 results Sep 22, 2006 Sep 22, 2006
Alkalinity, Caco3 Stability 1067 Water Quality 3 of 3 results Sep 22, 2006 Sep 22, 2006
Carbon Dioxide 1901 Water Quality 3 of 3 results Sep 22, 2006 Sep 22, 2006
Color 1905 Water Quality 3 of 3 results Sep 22, 2006 Sep 22, 2006
Hardness, Total (As Caco3) 1915 Water Quality 3 of 3 results Sep 22, 2006 Sep 22, 2006
PH 1925 Water Quality 3 of 3 results Sep 22, 2006 Sep 22, 2006
Alkalinity, Total 1927 Water Quality 3 of 3 results Sep 22, 2006 Sep 22, 2006
Iron, Field Result FEFD Inorganic Chemical 3 of 3 results Sep 22, 2006 Sep 22, 2006
Calculated Sodium NACA Water Quality 3 of 3 results Sep 22, 2006 Sep 22, 2006
PH, Field Result PHFD Water Quality 3 of 3 results Sep 22, 2006 Sep 22, 2006
Ethylbenzene 2992 Organic Chemical 3 of 62 results Mar 3, 2004 Mar 3, 2004
Nitrate 1040 Inorganic Chemical 2 of 66 results Aug 23, 2006 Aug 23, 2006
Dibromochloromethane 2944 Organic Chemical 1 of 14 results Aug 6, 2024 Aug 6, 2024
Monochloroacetic Acid 2450 Organic Chemical 1 of 14 results Dec 7, 2016 Dec 7, 2016
Iron 1028 Inorganic Chemical 1 of 3 results Sep 22, 2006 Sep 22, 2006
Nitrate-Nitrite 1038 Inorganic Chemical 1 of 66 results Aug 23, 2006 Aug 23, 2006

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 11–20 of 281 samples, newest first — collected April 17, 2024 to March 25, 2025. The summary above covers all 281.

82 results from the 10 samples listed here: 33 detected, 49 not detected. Across the whole record it is 280 of 2,206. 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 Lake Water Works, every result from 11 to 20 of 281 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
Mar 25, 2025 09:05
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
IN-250326-006
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 25, 2025 09:05, sampling point TF103 Arsenic 1005 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.0022 mg/l , sample collected Mar 25, 2025 09:05, sampling point TF103 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 25, 2025 09:05, sampling point TF103 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 25, 2025 09:05, sampling point TF103 Chromium 1020 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.185 mg/l , sample collected Mar 25, 2025 09:05, sampling point TF103 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 25, 2025 09:05, sampling point TF103 Mercury 1035 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 25, 2025 09:05, sampling point TF103 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Mar 25, 2025 09:05, sampling point TF103 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 25, 2025 09:05, sampling point TF103 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 25, 2025 09:05, sampling point TF103 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 25, 2025 09:05, sampling point TF103 Thallium, Total 1085 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Mar 25, 2025 08:52
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
IN-250326-005
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 25, 2025 08:52, sampling point TF102 Arsenic 1005 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.0041 mg/l , sample collected Mar 25, 2025 08:52, 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 25, 2025 08:52, 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 25, 2025 08:52, sampling point TF102 Chromium 1020 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.124 mg/l , sample collected Mar 25, 2025 08:52, sampling point TF102 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 25, 2025 08:52, sampling point TF102 Mercury 1035 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 25, 2025 08:52, sampling point TF102 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Mar 25, 2025 08:52, 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 25, 2025 08:52, 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 25, 2025 08:52, 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 25, 2025 08:52, sampling point TF102 Thallium, Total 1085 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Mar 25, 2025 08:55
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
IN-250326-004
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 25, 2025 08:55, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.0041 mg/l , sample collected Mar 25, 2025 08:55, 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 25, 2025 08:55, sampling point TF101 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 25, 2025 08:55, sampling point TF101 Chromium 1020 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.135 mg/l , sample collected Mar 25, 2025 08:55, 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 25, 2025 08:55, sampling point TF101 Mercury 1035 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 25, 2025 08:55, sampling point TF101 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Mar 25, 2025 08:55, 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 25, 2025 08:55, 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 25, 2025 08:55, 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 25, 2025 08:55, sampling point TF101 Thallium, Total 1085 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Nov 4, 2024 08:45
Sampling point
SM3 Location withheld
Sample type
Routine
Lab sample
810-126796-2
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Nov 4, 2024 08:45, sampling point SM3 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
9.5 ug/l , sample collected Nov 4, 2024 08:45, sampling point SM3 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
12 ug/l , sample collected Nov 4, 2024 08:45, sampling point SM3 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Nov 4, 2024 08:45, sampling point SM3 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Nov 4, 2024 08:45, sampling point SM3 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
21.5 ug/l , sample collected Nov 4, 2024 08:45, sampling point SM3 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Oct 1, 2024 – Dec 31, 2024
19 ug/l , sample collected Nov 4, 2024 08:45, sampling point SM3 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 4, 2024 08:45, sampling point SM3 Bromoform 2942 EPA method 524.2 Not recorded
3.2 ug/l , sample collected Nov 4, 2024 08:45, sampling point SM3 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 4, 2024 08:45, sampling point SM3 Dibromochloromethane 2944 EPA method 524.2 Not recorded
22.2 ug/l , sample collected Nov 4, 2024 08:45, sampling point SM3 TTHM 2950 EPA method 524.2 Oct 1, 2024 – Dec 31, 2024
Collected
Nov 4, 2024 08:55
Sampling point
SM4 Location withheld
Sample type
Routine
Lab sample
810-126796-1
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Nov 4, 2024 08:55, sampling point SM4 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
10 ug/l , sample collected Nov 4, 2024 08:55, sampling point SM4 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
12 ug/l , sample collected Nov 4, 2024 08:55, sampling point SM4 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Nov 4, 2024 08:55, sampling point SM4 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Nov 4, 2024 08:55, sampling point SM4 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
22 ug/l , sample collected Nov 4, 2024 08:55, sampling point SM4 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Oct 1, 2024 – Dec 31, 2024
22 ug/l , sample collected Nov 4, 2024 08:55, sampling point SM4 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 4, 2024 08:55, sampling point SM4 Bromoform 2942 EPA method 524.2 Not recorded
3.7 ug/l , sample collected Nov 4, 2024 08:55, sampling point SM4 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 4, 2024 08:55, sampling point SM4 Dibromochloromethane 2944 EPA method 524.2 Not recorded
25.7 ug/l , sample collected Nov 4, 2024 08:55, sampling point SM4 TTHM 2950 EPA method 524.2 Oct 1, 2024 – Dec 31, 2024
Collected
Aug 6, 2024 08:25
Sampling point
SM3 Location withheld
Sample type
Routine
Lab sample
810-114631-2
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Aug 6, 2024 08:25, sampling point SM3 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
4.8 ug/l , sample collected Aug 6, 2024 08:25, sampling point SM3 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
6.2 ug/l , sample collected Aug 6, 2024 08:25, sampling point SM3 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 6, 2024 08:25, sampling point SM3 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 6, 2024 08:25, sampling point SM3 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
11 ug/l , sample collected Aug 6, 2024 08:25, sampling point SM3 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jul 1, 2024 – Sep 30, 2024
14 ug/l , sample collected Aug 6, 2024 08:25, sampling point SM3 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 6, 2024 08:25, sampling point SM3 Bromoform 2942 EPA method 524.2 Not recorded
2.4 ug/l , sample collected Aug 6, 2024 08:25, sampling point SM3 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 6, 2024 08:25, sampling point SM3 Dibromochloromethane 2944 EPA method 524.2 Not recorded
16.4 ug/l , sample collected Aug 6, 2024 08:25, sampling point SM3 TTHM 2950 EPA method 524.2 Jul 1, 2024 – Sep 30, 2024
Collected
Aug 6, 2024 08:10
Sampling point
SM4 Location withheld
Sample type
Routine
Lab sample
810-114631-1
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Aug 6, 2024 08:10, sampling point SM4 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
11 ug/l , sample collected Aug 6, 2024 08:10, sampling point SM4 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
13 ug/l , sample collected Aug 6, 2024 08:10, sampling point SM4 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 6, 2024 08:10, sampling point SM4 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 6, 2024 08:10, sampling point SM4 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
24 ug/l , sample collected Aug 6, 2024 08:10, sampling point SM4 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jul 1, 2024 – Sep 30, 2024
29 ug/l , sample collected Aug 6, 2024 08:10, sampling point SM4 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 6, 2024 08:10, sampling point SM4 Bromoform 2942 EPA method 524.2 Not recorded
4.4 ug/l , sample collected Aug 6, 2024 08:10, sampling point SM4 Bromodichloromethane 2943 EPA method 524.2 Not recorded
0.61 ug/l , sample collected Aug 6, 2024 08:10, sampling point SM4 Dibromochloromethane 2944 EPA method 524.2 Not recorded
34.01 ug/l , sample collected Aug 6, 2024 08:10, sampling point SM4 TTHM 2950 EPA method 524.2 Jul 1, 2024 – Sep 30, 2024
Collected
Jun 25, 2024 08:42
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
HA-240626-021
Laboratory
MSDH Lab
20.5 ug/l , sample collected Jun 25, 2024 08:42, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Not recorded
Collected
Jun 25, 2024 08:43
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
TH-240626-021
Laboratory
MSDH Lab
27.4 ug/l , sample collected Jun 25, 2024 08:43, sampling point MRT000 TTHM 2950 EPA method 524.2 Not recorded
Collected
Apr 17, 2024 08:48
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
NI-240417-084
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 17, 2024 08:48, sampling point TF103 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Apr 17, 2024 08:48, sampling point TF103 Nitrate 1040 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 17, 2024 08:48, sampling point TF103 Nitrite 1041 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024

Routine (10).