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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 31–40 of 281 samples, newest first — collected December 1, 2022 to August 16, 2023. The summary above covers all 281.

41 results from the 10 samples listed here: 9 detected, 32 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 5 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 31 to 40 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
Aug 16, 2023 08:50
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
TH-230817-002
Laboratory
MSDH Lab
32.4 ug/l , sample collected Aug 16, 2023 08:50, sampling point MRT000 TTHM 2950 EPA method 524.2 Not recorded
Collected
Jul 25, 2023 06:00
Sampling point
LC0004 Location withheld
Sample type
Routine
Lab sample
PB-230725-077
Laboratory
MSDH Lab
0.05 mg/l , sample collected Jul 25, 2023 06:00, sampling point LC0004 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 25, 2023 06:00, sampling point LC0004 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Jul 25, 2023 02:00
Sampling point
LC0001 Location withheld
Sample type
Routine
Lab sample
PB-230725-076
Laboratory
MSDH Lab
0.0345 mg/l , sample collected Jul 25, 2023 02:00, sampling point LC0001 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
1.7 ug/l , sample collected Jul 25, 2023 02:00, sampling point LC0001 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Jul 25, 2023 06:15
Sampling point
LC0009 Location withheld
Sample type
Routine
Lab sample
PB-230725-075
Laboratory
MSDH Lab
0.0872 mg/l , sample collected Jul 25, 2023 06:15, sampling point LC0009 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
0.5 ug/l , sample collected Jul 25, 2023 06:15, sampling point LC0009 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Jul 25, 2023 07:15
Sampling point
LC0005 Location withheld
Sample type
Routine
Lab sample
PB-230725-074
Laboratory
MSDH Lab
0.0493 mg/l , sample collected Jul 25, 2023 07:15, sampling point LC0005 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
1 ug/l , sample collected Jul 25, 2023 07:15, sampling point LC0005 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Jul 25, 2023 04:30
Sampling point
LC0007 Location withheld
Sample type
Routine
Lab sample
PB-230725-073
Laboratory
MSDH Lab
0.037 mg/l , sample collected Jul 25, 2023 04:30, sampling point LC0007 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 25, 2023 04:30, sampling point LC0007 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Mar 14, 2023 09:10
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
NI-230314-093
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 14, 2023 09:10, 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 Mar 14, 2023 09:10, 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 Mar 14, 2023 09:10, sampling point TF103 Nitrite 1041 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Collected
Mar 14, 2023 07:45
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
NI-230314-094
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 14, 2023 07:45, 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 Mar 14, 2023 07:45, 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 Mar 14, 2023 07:45, sampling point TF102 Nitrite 1041 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Collected
Mar 14, 2023 07:25
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
NI-230314-095
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 14, 2023 07:25, 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 Mar 14, 2023 07:25, 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 Mar 14, 2023 07:25, sampling point TF101 Nitrite 1041 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Collected
Dec 1, 2022 08:20
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
VO-221202-013
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 1, 2022 08:20, sampling point TF103 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 1, 2022 08:20, sampling point TF103 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 1, 2022 08:20, sampling point TF103 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 1, 2022 08:20, sampling point TF103 Dichloromethane 2964 EPA method 524.2 Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 1, 2022 08:20, sampling point TF103 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 1, 2022 08:20, sampling point TF103 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 1, 2022 08:20, sampling point TF103 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 1, 2022 08:20, sampling point TF103 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 1, 2022 08:20, sampling point TF103 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 1, 2022 08:20, sampling point TF103 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 1, 2022 08:20, sampling point TF103 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 1, 2022 08:20, sampling point TF103 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 1, 2022 08:20, sampling point TF103 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 1, 2022 08:20, sampling point TF103 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 1, 2022 08:20, sampling point TF103 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 1, 2022 08:20, sampling point TF103 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 1, 2022 08:20, sampling point TF103 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 1, 2022 08:20, sampling point TF103 Benzene 2990 EPA method 524.2 Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 1, 2022 08:20, sampling point TF103 Toluene 2991 EPA method 524.2 Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 1, 2022 08:20, sampling point TF103 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 1, 2022 08:20, sampling point TF103 Styrene 2996 EPA method 524.2 Jan 1, 2022 – Dec 31, 2027

Routine (10).