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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 181–190 of 281 samples, newest first — collected March 15, 2010 to March 28, 2011. The summary above covers all 281.

57 results from the 10 samples listed here: 8 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.

Chemical and radiological sample results for Lake Water Works, every result from 181 to 190 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 28, 2011
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
110329-081NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 28, 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 Mar 28, 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 Mar 28, 2011, sampling point TF102 Nitrite 1041 EPA method 353.2 Jan 1, 2011 – Dec 31, 2011
Collected
Oct 18, 2010
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
101019-013IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 18, 2010, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
0.005659 mg/l , sample collected Oct 18, 2010, sampling point TF101 Barium 1010 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 18, 2010, sampling point TF101 Cadmium 1015 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 18, 2010, sampling point TF101 Chromium 1020 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Oct 18, 2010, sampling point TF101 Fluoride 1025 EPA method 380-75WE Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 18, 2010, sampling point TF101 Mercury 1035 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
0.001387 mg/l , sample collected Oct 18, 2010, sampling point TF101 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Oct 18, 2010, sampling point TF101 Selenium 1045 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 18, 2010, sampling point TF101 Antimony, Total 1074 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 18, 2010, sampling point TF101 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 18, 2010, sampling point TF101 Thallium, Total 1085 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Collected
Oct 18, 2010
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
101019-015CN
Laboratory
MSDH Lab
Not detected below 15 ug/l Minimum Reporting Level , sample collected Oct 18, 2010, sampling point TF101 Cyanide 1024 EPA method QC10204001X Jan 1, 2008 – Dec 31, 2010
Collected
Sep 22, 2010
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
100923-028NI
Laboratory
MSDH Lab
Not detected below 0.25 mg/l Minimum Reporting Level , sample collected Sep 22, 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 Sep 22, 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 Sep 22, 2010, sampling point TF102 Nitrite 1041 EPA method 353.2 Jan 1, 2010 – Dec 31, 2010
Collected
Sep 22, 2010
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
100923-009NI
Laboratory
MSDH Lab
Not detected below 0.25 mg/l Minimum Reporting Level , sample collected Sep 22, 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 Sep 22, 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 Sep 22, 2010, sampling point TF101 Nitrite 1041 EPA method 353.2 Jan 1, 2010 – Dec 31, 2010
Collected
Sep 22, 2010
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
100923-008NI
Laboratory
MSDH Lab
Not detected below 0.25 mg/l Minimum Reporting Level , sample collected Sep 22, 2010, sampling point TF103 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 Sep 22, 2010, sampling point TF103 Nitrate 1040 EPA method 353.2 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Sep 22, 2010, sampling point TF103 Nitrite 1041 EPA method 353.2 Jan 1, 2010 – Dec 31, 2010
Collected
Aug 19, 2010
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
100820-008VO
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Aug 19, 2010, sampling point TF101 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Aug 19, 2010, sampling point TF101 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Aug 19, 2010, sampling point TF101 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Aug 19, 2010, sampling point TF101 Dichloromethane 2964 EPA method 524.2 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Aug 19, 2010, sampling point TF101 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Aug 19, 2010, sampling point TF101 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Aug 19, 2010, sampling point TF101 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Aug 19, 2010, sampling point TF101 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Aug 19, 2010, sampling point TF101 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Aug 19, 2010, sampling point TF101 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Aug 19, 2010, sampling point TF101 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Aug 19, 2010, sampling point TF101 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Aug 19, 2010, sampling point TF101 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Aug 19, 2010, sampling point TF101 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Aug 19, 2010, sampling point TF101 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Aug 19, 2010, sampling point TF101 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Aug 19, 2010, sampling point TF101 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Aug 19, 2010, sampling point TF101 Benzene 2990 EPA method 524.2 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Aug 19, 2010, sampling point TF101 Toluene 2991 EPA method 524.2 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Aug 19, 2010, sampling point TF101 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Aug 19, 2010, sampling point TF101 Styrene 2996 EPA method 524.2 Jan 1, 2010 – Dec 31, 2010
Collected
Jul 14, 2010
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
100715-010TH
Laboratory
MSDH Lab
17.8 ug/l , sample collected Jul 14, 2010, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 14, 2010, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
2.67 ug/l , sample collected Jul 14, 2010, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 14, 2010, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
20.47 ug/l , sample collected Jul 14, 2010, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2008 – Dec 31, 2010
Collected
Jul 14, 2010
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
100715-010HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Jul 14, 2010, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.006 mg/l , sample collected Jul 14, 2010, sampling point MRT000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
0.006 mg/l , sample collected Jul 14, 2010, sampling point MRT000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 14, 2010, sampling point MRT000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 14, 2010, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.01 mg/l , sample collected Jul 14, 2010, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 Jan 1, 2008 – Dec 31, 2010
Collected
Mar 15, 2010
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
100316-011CN
Laboratory
MSDH Lab
Not detected below 15 ug/l Minimum Reporting Level , sample collected Mar 15, 2010, sampling point TF103 Cyanide 1024 EPA method QC10204001X Jan 1, 2008 – Dec 31, 2010

Routine (10).