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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 101–110 of 251 samples, newest first — collected June 19, 2014 to August 13, 2014. The summary above covers all 251.

21 results from the 10 samples listed here: 9 detected, 12 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.

Chemical and radiological sample results for Black Hawk Water Assn #1, every result from 101 to 110 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
Aug 13, 2014 01:00
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
140814-026TH
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 13, 2014 01:00, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 13, 2014 01:00, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 13, 2014 01:00, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 13, 2014 01:00, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
Not detected below 4 ug/l Minimum Reporting Level , sample collected Aug 13, 2014 01:00, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2014 – Dec 31, 2016
Collected
Jul 2, 2014 01:35
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
140703-014CN
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Jul 2, 2014 01:35, sampling point TF101 Cyanide 1024 EPA method QC10204001X Jan 1, 2014 – Dec 31, 2016
Collected
Jul 2, 2014 01:40
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
140703-013CN
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Jul 2, 2014 01:40, sampling point TF102 Cyanide 1024 EPA method QC10204001X Jan 1, 2014 – Dec 31, 2016
Collected
Jun 19, 2014 08:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
140620-075PB
Laboratory
MSDH Lab
0.0749 mg/l , sample collected Jun 19, 2014 08:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 19, 2014 08:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Collected
Jun 19, 2014 09:20
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
140620-074PB
Laboratory
MSDH Lab
0.0486 mg/l , sample collected Jun 19, 2014 09:20, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 19, 2014 09:20, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Collected
Jun 19, 2014 10:20
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
140620-073PB
Laboratory
MSDH Lab
0.0761 mg/l , sample collected Jun 19, 2014 10:20, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 19, 2014 10:20, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Collected
Jun 19, 2014 10:30
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
140620-071PB
Laboratory
MSDH Lab
0.0443 mg/l , sample collected Jun 19, 2014 10:30, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 19, 2014 10:30, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Collected
Jun 19, 2014 08:15
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
140620-070PB
Laboratory
MSDH Lab
0.0176 mg/l , sample collected Jun 19, 2014 08:15, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 19, 2014 08:15, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Collected
Jun 19, 2014 02:45
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
140620-022PB
Laboratory
MSDH Lab
0.0247 mg/l , sample collected Jun 19, 2014 02:45, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
0.0057 mg/l , sample collected Jun 19, 2014 02:45, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Collected
Jun 19, 2014 02:30
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
140620-021PB
Laboratory
MSDH Lab
0.0382 mg/l , sample collected Jun 19, 2014 02:30, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
0.0049 mg/l , sample collected Jun 19, 2014 02:30, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014

Routine (10).