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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

MS0080001 , Black Hawk Water Assn #1

19 of the 57 analytes this system has been tested for have been detected at least once, across 251 samples on record.

The other 38 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 251 samples on record, detections range from January 11, 1994 to January 14, 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 Black Hawk Water Assn #1, 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 89 of 104 results Apr 26, 1994 Jul 24, 2023
Lead 1030 Inorganic Chemical 43 of 104 results Jan 11, 1994 Jul 24, 2023
Barium 1010 Inorganic Chemical 22 of 22 results Jul 25, 2002 Jan 14, 2025
Nitrate-Nitrite 1038 Inorganic Chemical 11 of 44 results Jun 14, 2006 Jan 14, 2025
Gross Alpha, Incl. Radon & U 4002 Radionuclide 10 of 10 results Dec 7, 2011 Jul 13, 2012
Chromium 1020 Inorganic Chemical 9 of 22 results Jul 25, 2002 Jan 14, 2025
Nitrite 1041 Inorganic Chemical 8 of 44 results Jun 14, 2006 Nov 6, 2018
Fluoride 1025 Inorganic Chemical 7 of 22 results Mar 2, 2005 Jan 14, 2025
Nitrate 1040 Inorganic Chemical 5 of 44 results May 7, 2008 Jan 14, 2025
TTHM 2950 Organic Chemical 4 of 17 results Jul 10, 2007 Aug 14, 2024
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 4 of 17 results Jul 10, 2007 Aug 13, 2014
Sodium 1052 Inorganic Chemical 3 of 3 results Jan 20, 2021 Oct 15, 2024
Chloroform 2941 Organic Chemical 3 of 13 results Sep 6, 2017 Aug 14, 2024
Nickel 1036 Inorganic Chemical 3 of 22 results Mar 12, 2008 Apr 23, 2014
Dichloroacetic Acid 2451 Organic Chemical 2 of 13 results Aug 13, 2014 Aug 13, 2014
Cadmium 1015 Inorganic Chemical 2 of 22 results Mar 2, 2005 Mar 2, 2005
Selenium 1045 Inorganic Chemical 2 of 22 results Mar 2, 2005 Mar 2, 2005
Sulfate 1055 Inorganic Chemical 2 of 4 results Sep 22, 2003 Jan 14, 2004
Trichloroacetic Acid 2452 Organic Chemical 1 of 13 results Aug 13, 2014 Aug 13, 2014

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 251 samples, newest first — collected July 24, 2023 to July 24, 2023. The summary above covers all 251.

20 results from the 10 samples listed here: 16 detected, 4 not detected. Across the whole record it is 230 of 1,104. 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 Black Hawk Water Assn #1, every result from 21 to 30 of 251 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 24, 2023 09:00
Sampling point
LC0004 Location withheld
Sample type
Routine
Lab sample
PB-230725-036
Laboratory
MSDH Lab
0.0043 mg/l , sample collected Jul 24, 2023 09:00, sampling point LC0004 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
1.2 ug/l , sample collected Jul 24, 2023 09:00, sampling point LC0004 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Jul 24, 2023 09:30
Sampling point
LC0001 Location withheld
Sample type
Routine
Lab sample
PB-230725-037
Laboratory
MSDH Lab
0.0817 mg/l , sample collected Jul 24, 2023 09:30, sampling point LC0001 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
1.2 ug/l , sample collected Jul 24, 2023 09:30, sampling point LC0001 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Jul 24, 2023 06:30
Sampling point
LC0003 Location withheld
Sample type
Routine
Lab sample
PB-230725-035
Laboratory
MSDH Lab
0.065 mg/l , sample collected Jul 24, 2023 06:30, sampling point LC0003 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 24, 2023 06:30, sampling point LC0003 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Jul 24, 2023 14:30
Sampling point
LC0012 Location withheld
Sample type
Routine
Lab sample
PB-230725-034
Laboratory
MSDH Lab
0.134 mg/l , sample collected Jul 24, 2023 14:30, sampling point LC0012 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 24, 2023 14:30, sampling point LC0012 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Jul 24, 2023 14:15
Sampling point
LC0011 Location withheld
Sample type
Routine
Lab sample
PB-230725-033
Laboratory
MSDH Lab
0.0051 mg/l , sample collected Jul 24, 2023 14:15, sampling point LC0011 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 24, 2023 14:15, sampling point LC0011 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Jul 24, 2023 11:10
Sampling point
LC0010 Location withheld
Sample type
Routine
Lab sample
PB-230725-032
Laboratory
MSDH Lab
0.0022 mg/l , sample collected Jul 24, 2023 11:10, sampling point LC0010 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
0.7 ug/l , sample collected Jul 24, 2023 11:10, sampling point LC0010 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Jul 24, 2023 10:55
Sampling point
LC0009 Location withheld
Sample type
Routine
Lab sample
PB-230725-031
Laboratory
MSDH Lab
0.0093 mg/l , sample collected Jul 24, 2023 10:55, sampling point LC0009 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
1.2 ug/l , sample collected Jul 24, 2023 10:55, sampling point LC0009 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Jul 24, 2023 07:15
Sampling point
LC0008 Location withheld
Sample type
Routine
Lab sample
PB-230725-039
Laboratory
MSDH Lab
0.0052 mg/l , sample collected Jul 24, 2023 07:15, 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 Jul 24, 2023 07:15, sampling point LC0008 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Jul 24, 2023 07:30
Sampling point
LC0007 Location withheld
Sample type
Routine
Lab sample
PB-230725-038
Laboratory
MSDH Lab
0.0075 mg/l , sample collected Jul 24, 2023 07:30, sampling point LC0007 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
1 ug/l , sample collected Jul 24, 2023 07:30, sampling point LC0007 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Jul 24, 2023 10:45
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
PB-230725-030
Laboratory
MSDH Lab
0.114 mg/l , sample collected Jul 24, 2023 10:45, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
2.4 ug/l , sample collected Jul 24, 2023 10:45, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023

Routine (10).