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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

MS0810012 , Tri-Lakes Water Assn-West

34 of the 73 analytes this system has been tested for have been detected at least once, across 160 samples on record.

The other 39 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 160 samples on record, detections range from November 5, 2003 to September 30, 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 Tri-Lakes Water Assn-West, 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 66 of 66 results Aug 21, 2007 Aug 15, 2023
TTHM 2950 Organic Chemical 17 of 20 results Sep 13, 2004 Sep 30, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 16 of 21 results Sep 18, 2007 Sep 30, 2025
Chloroform 2941 Organic Chemical 15 of 15 results Sep 18, 2007 Sep 30, 2025
Bromodichloromethane 2943 Organic Chemical 15 of 15 results Sep 18, 2007 Sep 30, 2025
Dibromochloromethane 2944 Organic Chemical 15 of 15 results Sep 18, 2007 Sep 30, 2025
Lead 1030 Inorganic Chemical 13 of 66 results Aug 21, 2007 Aug 15, 2023
Dichloroacetic Acid 2451 Organic Chemical 11 of 15 results Aug 2, 2010 Sep 30, 2025
Trichloroacetic Acid 2452 Organic Chemical 11 of 15 results Sep 23, 2013 Sep 30, 2025
Barium 1010 Inorganic Chemical 10 of 10 results Nov 5, 2003 Apr 8, 2025
Fluoride 1025 Inorganic Chemical 5 of 11 results Nov 5, 2003 Apr 8, 2025
Gross Alpha, Incl. Radon & U 4002 Radionuclide 5 of 5 results Dec 12, 2011 Jul 19, 2012
Chromium 1020 Inorganic Chemical 3 of 10 results May 10, 2010 Apr 8, 2025
Nickel 1036 Inorganic Chemical 3 of 10 results May 10, 2010 Apr 8, 2025
Sodium 1052 Inorganic Chemical 3 of 3 results Dec 13, 2007 Mar 21, 2023
Bromoform 2942 Organic Chemical 2 of 15 results Oct 1, 2024 Oct 1, 2024
Monobromoacetic Acid 2453 Organic Chemical 1 of 15 results Nov 3, 2020 Nov 3, 2020
Dibromoacetic Acid 2454 Organic Chemical 1 of 15 results Sep 23, 2013 Sep 23, 2013
Arsenic 1005 Inorganic Chemical 1 of 10 results May 10, 2010 May 10, 2010
Calcium 1016 Inorganic Chemical 1 of 1 result Dec 13, 2007 Dec 13, 2007
Chloride 1017 Inorganic Chemical 1 of 1 result Dec 13, 2007 Dec 13, 2007
Magnesium 1031 Inorganic Chemical 1 of 1 result Dec 13, 2007 Dec 13, 2007
Manganese 1032 Inorganic Chemical 1 of 1 result Dec 13, 2007 Dec 13, 2007
Potassium 1042 Inorganic Chemical 1 of 1 result Dec 13, 2007 Dec 13, 2007
Residue, Total, Filterable 1057 Water Quality 1 of 1 result Dec 13, 2007 Dec 13, 2007
Alkalinity, Caco3 Stability 1067 Water Quality 1 of 1 result Dec 13, 2007 Dec 13, 2007
Carbon Dioxide 1901 Water Quality 1 of 1 result Dec 13, 2007 Dec 13, 2007
Hardness, Total (As Caco3) 1915 Water Quality 1 of 1 result Dec 13, 2007 Dec 13, 2007
PH 1925 Water Quality 1 of 1 result Dec 13, 2007 Dec 13, 2007
Alkalinity, Total 1927 Water Quality 1 of 1 result Dec 13, 2007 Dec 13, 2007
Iron, Field Result FEFD Inorganic Chemical 1 of 1 result Dec 13, 2007 Dec 13, 2007
Calculated Sodium NACA Water Quality 1 of 1 result Dec 13, 2007 Dec 13, 2007
PH, Field Result PHFD Water Quality 1 of 1 result Dec 13, 2007 Dec 13, 2007
Toluene 2991 Organic Chemical 1 of 8 results Sep 13, 2004 Sep 13, 2004

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 21–30 of 160 samples, newest first — collected August 15, 2023 to September 12, 2023. The summary above covers all 160.

19 results from the 10 samples listed here: 12 detected, 7 not detected. Across the whole record it is 228 of 708. 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 9 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 Tri-Lakes Water Assn-West, every result from 21 to 30 of 160 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
Sep 12, 2023 14:00
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
HA-230913-009
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 12, 2023 14:00, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2023 – Dec 31, 2023
Collected
Aug 15, 2023 07:00
Sampling point
LC0101 Location withheld
Sample type
Routine
Lab sample
PB-230816-046
Laboratory
MSDH Lab
0.0519 mg/l , sample collected Aug 15, 2023 07:00, sampling point LC0101 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
1.1 ug/l , sample collected Aug 15, 2023 07:00, sampling point LC0101 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Aug 15, 2023 06:45
Sampling point
LC0008 Location withheld
Sample type
Routine
Lab sample
PB-230816-047
Laboratory
MSDH Lab
0.172 mg/l , sample collected Aug 15, 2023 06:45, sampling point LC0008 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 Aug 15, 2023 06:45, sampling point LC0008 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Aug 15, 2023 06:30
Sampling point
LC0110 Location withheld
Sample type
Routine
Lab sample
PB-230816-048
Laboratory
MSDH Lab
0.108 mg/l , sample collected Aug 15, 2023 06:30, sampling point LC0110 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 Aug 15, 2023 06:30, sampling point LC0110 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Aug 15, 2023 07:00
Sampling point
LC0136 Location withheld
Sample type
Routine
Lab sample
PB-230816-049
Laboratory
MSDH Lab
0.169 mg/l , sample collected Aug 15, 2023 07:00, sampling point LC0136 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 Aug 15, 2023 07:00, sampling point LC0136 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Aug 15, 2023 08:00
Sampling point
LC0020 Location withheld
Sample type
Routine
Lab sample
PB-230816-050
Laboratory
MSDH Lab
0.238 mg/l , sample collected Aug 15, 2023 08:00, sampling point LC0020 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
0.6 ug/l , sample collected Aug 15, 2023 08:00, sampling point LC0020 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Aug 15, 2023 07:30
Sampling point
LC0025 Location withheld
Sample type
Routine
Lab sample
PB-230816-051
Laboratory
MSDH Lab
0.0833 mg/l , sample collected Aug 15, 2023 07:30, sampling point LC0025 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 Aug 15, 2023 07:30, sampling point LC0025 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Aug 15, 2023 06:00
Sampling point
LC0095 Location withheld
Sample type
Routine
Lab sample
PB-230816-052
Laboratory
MSDH Lab
0.176 mg/l , sample collected Aug 15, 2023 06:00, sampling point LC0095 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 Aug 15, 2023 06:00, sampling point LC0095 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Aug 15, 2023 06:15
Sampling point
LC0075 Location withheld
Sample type
Routine
Lab sample
PB-230816-053
Laboratory
MSDH Lab
0.137 mg/l , sample collected Aug 15, 2023 06:15, sampling point LC0075 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 Aug 15, 2023 06:15, sampling point LC0075 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Aug 15, 2023 07:45
Sampling point
LC0053 Location withheld
Sample type
Routine
Lab sample
PB-230816-054
Laboratory
MSDH Lab
0.235 mg/l , sample collected Aug 15, 2023 07:45, sampling point LC0053 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
0.5 ug/l , sample collected Aug 15, 2023 07:45, sampling point LC0053 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023

Routine (10).