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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 121–130 of 251 samples, newest first — collected April 18, 2012 to January 14, 2013. The summary above covers all 251.

67 results from the 10 samples listed here: 5 detected, 62 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 121 to 130 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
Jan 14, 2013 01:30
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
130115-030NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 14, 2013 01:30, sampling point TF102 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 14, 2013 01:30, sampling point TF102 Nitrate 1040 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 14, 2013 01:30, sampling point TF102 Nitrite 1041 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Collected
Jul 13, 2012 13:15
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
201211120039
Laboratory
Radiation Safety Engineering
0.9 pci/l , sample collected Jul 13, 2012 13:15, sampling point TF102 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.37 pci/l Minimum Reporting Level , sample collected Jul 13, 2012 13:15, sampling point TF102 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.264 pci/l Minimum Reporting Level , sample collected Jul 13, 2012 13:15, sampling point TF102 Radium-226 4020 EPA method 903.1 Jul 1, 2012 – Sep 30, 2012
Not detected below 0.37 pci/l Minimum Reporting Level , sample collected Jul 13, 2012 13:15, sampling point TF102 Radium-228 4030 EPA method 904.0 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 13, 2012 13:40
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
201211120034
Laboratory
Radiation Safety Engineering
0.6 pci/l , sample collected Jul 13, 2012 13:40, sampling point TF101 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.35 pci/l Minimum Reporting Level , sample collected Jul 13, 2012 13:40, sampling point TF101 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.242 pci/l Minimum Reporting Level , sample collected Jul 13, 2012 13:40, sampling point TF101 Radium-226 4020 EPA method 903.1 Jul 1, 2012 – Sep 30, 2012
Not detected below 0.35 pci/l Minimum Reporting Level , sample collected Jul 13, 2012 13:40, sampling point TF101 Radium-228 4030 EPA method 904.0 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 12, 2012 14:30
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
120713-022
Laboratory
Radiation Safety Engineering
0.9 pci/l , sample collected Jul 12, 2012 14:30, sampling point TF102 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.37 pci/l Minimum Reporting Level , sample collected Jul 12, 2012 14:30, sampling point TF102 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.264 pci/l Minimum Reporting Level , sample collected Jul 12, 2012 14:30, sampling point TF102 Radium-226 4020 EPA method 903.1 Jul 1, 2012 – Sep 30, 2012
Not detected below 0.37 pci/l Minimum Reporting Level , sample collected Jul 12, 2012 14:30, sampling point TF102 Radium-228 4030 EPA method 904.0 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 12, 2012 14:45
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
120713-021
Laboratory
Radiation Safety Engineering
0.6 pci/l , sample collected Jul 12, 2012 14:45, sampling point TF101 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.35 pci/l Minimum Reporting Level , sample collected Jul 12, 2012 14:45, sampling point TF101 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.242 pci/l Minimum Reporting Level , sample collected Jul 12, 2012 14:45, sampling point TF101 Radium-226 4020 EPA method 903.1 Jul 1, 2012 – Sep 30, 2012
Not detected below 0.35 pci/l Minimum Reporting Level , sample collected Jul 12, 2012 14:45, sampling point TF101 Radium-228 4030 EPA method 904.0 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 12, 2012 14:32
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
120713-022RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 12, 2012 14:32, sampling point TF102 Combined Uranium 4006 EPA method 200.8 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 12, 2012 14:47
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
120713-021RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 12, 2012 14:47, sampling point TF101 Combined Uranium 4006 EPA method 200.8 Jul 1, 2012 – Sep 30, 2012
Collected
Jun 26, 2012 01:05
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
120627-012VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:05, sampling point TF102 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:05, sampling point TF102 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:05, sampling point TF102 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:05, sampling point TF102 Dichloromethane 2964 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:05, sampling point TF102 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:05, sampling point TF102 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:05, sampling point TF102 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:05, sampling point TF102 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:05, sampling point TF102 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:05, sampling point TF102 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:05, sampling point TF102 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:05, sampling point TF102 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:05, sampling point TF102 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:05, sampling point TF102 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:05, sampling point TF102 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:05, sampling point TF102 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:05, sampling point TF102 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:05, sampling point TF102 Benzene 2990 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:05, sampling point TF102 Toluene 2991 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:05, sampling point TF102 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:05, sampling point TF102 Styrene 2996 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Collected
Jun 26, 2012 01:00
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
120627-011VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:00, sampling point TF101 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:00, sampling point TF101 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:00, sampling point TF101 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:00, sampling point TF101 Dichloromethane 2964 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:00, sampling point TF101 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:00, sampling point TF101 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:00, sampling point TF101 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:00, sampling point TF101 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:00, sampling point TF101 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:00, sampling point TF101 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:00, sampling point TF101 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:00, sampling point TF101 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:00, sampling point TF101 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:00, sampling point TF101 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:00, sampling point TF101 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:00, sampling point TF101 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:00, sampling point TF101 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:00, sampling point TF101 Benzene 2990 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:00, sampling point TF101 Toluene 2991 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:00, sampling point TF101 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 26, 2012 01:00, sampling point TF101 Styrene 2996 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Collected
Apr 18, 2012 15:44
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
120419-062
Laboratory
Radiation Safety Engineering
0.9 pci/l , sample collected Apr 18, 2012 15:44, sampling point TF102 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.37 pci/l Minimum Reporting Level , sample collected Apr 18, 2012 15:44, sampling point TF102 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.264 pci/l Minimum Reporting Level , sample collected Apr 18, 2012 15:44, sampling point TF102 Radium-226 4020 EPA method 903.1 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.37 pci/l Minimum Reporting Level , sample collected Apr 18, 2012 15:44, sampling point TF102 Radium-228 4030 EPA method 904.0 Apr 1, 2012 – Jun 30, 2012

Routine (10).