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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 31–40 of 251 samples, newest first — collected January 19, 2022 to January 18, 2023. The summary above covers all 251.

78 results from the 10 samples listed here: 3 detected, 75 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 1 sampling point 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 31 to 40 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 18, 2023 13:50
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
NI-230119-042
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 18, 2023 13:50, sampling point TF102 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 18, 2023 13:50, sampling point TF102 Nitrate 1040 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 18, 2023 13:50, sampling point TF102 Nitrite 1041 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Collected
Jan 18, 2023 13:40
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
NI-230119-041
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 18, 2023 13:40, sampling point TF101 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 18, 2023 13:40, sampling point TF101 Nitrate 1040 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 18, 2023 13:40, sampling point TF101 Nitrite 1041 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Collected
Sep 14, 2022 13:45
Sampling point
SMD Location withheld
Sample type
Routine
Lab sample
HA-220915-015
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 14, 2022 13:45, sampling point SMD Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2020 – Dec 31, 2022
Collected
Sep 14, 2022 13:45
Sampling point
SMD Location withheld
Sample type
Routine
Lab sample
TH-220915-015
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 14, 2022 13:45, sampling point SMD TTHM 2950 EPA method 524.2 Jan 1, 2020 – Dec 31, 2022
Collected
May 4, 2022 08:30
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
IN-220505-015
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 4, 2022 08:30, sampling point TF102 Arsenic 1005 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.0086 mg/l , sample collected May 4, 2022 08:30, sampling point TF102 Barium 1010 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 4, 2022 08:30, sampling point TF102 Cadmium 1015 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 4, 2022 08:30, sampling point TF102 Chromium 1020 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected May 4, 2022 08:30, sampling point TF102 Fluoride 1025 EPA method QC 10-109-12-2-A Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 4, 2022 08:30, sampling point TF102 Mercury 1035 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 4, 2022 08:30, sampling point TF102 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected May 4, 2022 08:30, sampling point TF102 Selenium 1045 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 4, 2022 08:30, sampling point TF102 Antimony, Total 1074 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 4, 2022 08:30, sampling point TF102 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 4, 2022 08:30, sampling point TF102 Thallium, Total 1085 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Collected
May 4, 2022 08:15
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
IN-220505-014
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 4, 2022 08:15, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.029 mg/l , sample collected May 4, 2022 08:15, sampling point TF101 Barium 1010 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 4, 2022 08:15, sampling point TF101 Cadmium 1015 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.0006 mg/l , sample collected May 4, 2022 08:15, sampling point TF101 Chromium 1020 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected May 4, 2022 08:15, sampling point TF101 Fluoride 1025 EPA method QC 10-109-12-2-A Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 4, 2022 08:15, sampling point TF101 Mercury 1035 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 4, 2022 08:15, sampling point TF101 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected May 4, 2022 08:15, sampling point TF101 Selenium 1045 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 4, 2022 08:15, sampling point TF101 Antimony, Total 1074 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 4, 2022 08:15, sampling point TF101 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 4, 2022 08:15, sampling point TF101 Thallium, Total 1085 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Collected
Mar 31, 2022 13:30
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
VO-220401-002
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF102 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF102 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF102 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF102 Dichloromethane 2964 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF102 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF102 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF102 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF102 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF102 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF102 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF102 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF102 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF102 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF102 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF102 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF102 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF102 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF102 Benzene 2990 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF102 Toluene 2991 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF102 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF102 Styrene 2996 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Collected
Mar 31, 2022 13:30
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
VO-220401-001
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF101 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF101 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF101 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF101 Dichloromethane 2964 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF101 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF101 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF101 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF101 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF101 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF101 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF101 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF101 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF101 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF101 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF101 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF101 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF101 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF101 Benzene 2990 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF101 Toluene 2991 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF101 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 31, 2022 13:30, sampling point TF101 Styrene 2996 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Collected
Jan 19, 2022 09:15
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
NI-220120-076
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 19, 2022 09:15, sampling point TF102 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2022 – Dec 31, 2022
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 19, 2022 09:15, sampling point TF102 Nitrate 1040 EPA method QC10107041C Jan 1, 2022 – Dec 31, 2022
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 19, 2022 09:15, sampling point TF102 Nitrite 1041 EPA method QC10107041C Jan 1, 2022 – Dec 31, 2022
Collected
Jan 19, 2022 09:30
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
NI-220120-057
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 19, 2022 09:30, sampling point TF101 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2022 – Dec 31, 2022
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 19, 2022 09:30, sampling point TF101 Nitrate 1040 EPA method QC10107041C Jan 1, 2022 – Dec 31, 2022
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 19, 2022 09:30, sampling point TF101 Nitrite 1041 EPA method QC10107041C Jan 1, 2022 – Dec 31, 2022

Routine (10).