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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

MS0760076 , Black Bayou Water Assn.

55 of the 73 analytes this system has been tested for have been detected at least once, across 1,098 samples on record.

The other 18 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 1,098 samples on record, detections range from January 29, 2002 to July 22, 2026. 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 Bayou Water Assn., 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
Fluoride 1025 Inorganic Chemical 115 of 115 results Jan 29, 2002 Jun 29, 2026
TTHM 2950 Organic Chemical 112 of 114 results Aug 25, 2004 Feb 25, 2026
Barium 1010 Inorganic Chemical 110 of 112 results Jan 29, 2002 Jun 12, 2026
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 107 of 109 results Aug 25, 2004 Feb 25, 2026
Copper, Free 1022 Inorganic Chemical 107 of 107 results Aug 21, 2007 Aug 10, 2023
Chromium 1020 Inorganic Chemical 92 of 112 results Jan 29, 2002 Oct 7, 2025
Chloroform 2941 Organic Chemical 71 of 73 results Mar 1, 2006 Feb 25, 2026
Selenium 1045 Inorganic Chemical 64 of 112 results Nov 17, 2003 Oct 7, 2025
Bromodichloromethane 2943 Organic Chemical 62 of 73 results Mar 1, 2006 Feb 25, 2026
Dichloroacetic Acid 2451 Organic Chemical 61 of 63 results Feb 25, 2008 Feb 25, 2026
Arsenic 1005 Inorganic Chemical 59 of 112 results Nov 17, 2003 Oct 7, 2025
Lead 1030 Inorganic Chemical 59 of 107 results Aug 21, 2007 Aug 10, 2023
Dibromochloromethane 2944 Organic Chemical 55 of 73 results Mar 1, 2006 Feb 25, 2026
Trichloroacetic Acid 2452 Organic Chemical 53 of 63 results Feb 25, 2008 Feb 25, 2026
Gross Alpha, Incl. Radon & U 4002 Radionuclide 50 of 50 results Dec 5, 2011 Oct 9, 2012
Xylenes, Total 2955 Organic Chemical 42 of 230 results Jun 27, 2002 Aug 3, 2021
Dibromoacetic Acid 2454 Organic Chemical 30 of 63 results Jul 20, 2009 Feb 25, 2026
Nickel 1036 Inorganic Chemical 28 of 110 results Nov 17, 2003 Jul 8, 2025
Bromoform 2942 Organic Chemical 27 of 73 results May 23, 2006 Mar 25, 2020
Sodium 1052 Inorganic Chemical 19 of 19 results Aug 30, 2006 Jul 22, 2026
Monobromoacetic Acid 2453 Organic Chemical 17 of 63 results Jun 11, 2012 Sep 28, 2020
Ethylbenzene 2992 Organic Chemical 17 of 230 results Sep 26, 2002 Aug 7, 2019
Nitrate-Nitrite 1038 Inorganic Chemical 14 of 203 results Nov 29, 2004 Jul 22, 2026
Nitrate 1040 Inorganic Chemical 14 of 203 results Nov 29, 2004 Jul 22, 2026
Nitrite 1041 Inorganic Chemical 14 of 203 results Aug 7, 2006 Apr 24, 2024
Monochloroacetic Acid 2450 Organic Chemical 14 of 63 results Sep 15, 2009 Jun 30, 2020
Dichloromethane 2964 Organic Chemical 8 of 230 results Sep 8, 2004 Mar 9, 2009
P-Dichlorobenzene 2969 Organic Chemical 5 of 230 results Jun 16, 2005 Mar 12, 2009
Cyanide 1024 Inorganic Chemical 4 of 110 results Apr 12, 2004 Jul 20, 2016
Calcium 1016 Inorganic Chemical 3 of 3 results Aug 30, 2006 Apr 1, 2009
Chloride 1017 Inorganic Chemical 3 of 3 results Aug 30, 2006 Apr 1, 2009
Magnesium 1031 Inorganic Chemical 3 of 3 results Aug 30, 2006 Apr 1, 2009
Manganese 1032 Inorganic Chemical 3 of 3 results Aug 30, 2006 Apr 1, 2009
Potassium 1042 Inorganic Chemical 3 of 3 results Aug 30, 2006 Apr 1, 2009
Sulfate 1055 Inorganic Chemical 3 of 25 results Nov 3, 2003 Apr 1, 2009
Residue, Total, Filterable 1057 Water Quality 3 of 3 results Aug 30, 2006 Apr 1, 2009
Alkalinity, Caco3 Stability 1067 Water Quality 3 of 3 results Aug 30, 2006 Apr 1, 2009
Carbon Dioxide 1901 Water Quality 3 of 3 results Aug 30, 2006 Apr 1, 2009
Color 1905 Water Quality 3 of 3 results Aug 30, 2006 Apr 1, 2009
Hardness, Total (As Caco3) 1915 Water Quality 3 of 3 results Aug 30, 2006 Apr 1, 2009
Alkalinity, Total 1927 Water Quality 3 of 3 results Aug 30, 2006 Apr 1, 2009
Calculated Sodium NACA Water Quality 3 of 3 results Aug 30, 2006 Apr 1, 2009
PH, Field Result PHFD Water Quality 3 of 3 results Aug 30, 2006 Apr 1, 2009
PH 1925 Water Quality 2 of 2 results Aug 30, 2006 Apr 1, 2009
Carbon Tetrachloride 2982 Organic Chemical 2 of 230 results Sep 8, 2004 Aug 18, 2008
Cadmium 1015 Inorganic Chemical 2 of 112 results May 2, 2005 May 2, 2005
Toluene 2991 Organic Chemical 2 of 230 results Sep 26, 2002 Nov 6, 2002
Combined Radium (-226 & -228) 4010 Radionuclide 1 of 52 results Jun 24, 2020 Jun 24, 2020
Radium-226 4020 Radionuclide 1 of 52 results Jun 24, 2020 Jun 24, 2020
Radium-228 4030 Radionuclide 1 of 52 results Jun 24, 2020 Jun 24, 2020
Combined Uranium 4006 Radionuclide 1 of 45 results May 22, 2012 May 22, 2012
Temperature, Field Result TEMP Water Quality 1 of 1 result Aug 30, 2006 Aug 30, 2006
Mercury 1035 Inorganic Chemical 1 of 110 results Apr 25, 2006 Apr 25, 2006
Styrene 2996 Organic Chemical 1 of 230 results Feb 23, 2005 Feb 23, 2005
1,2-Dichloroethane 2980 Organic Chemical 1 of 230 results Sep 8, 2004 Sep 8, 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 441–450 of 1,098 samples, newest first — collected October 14, 2015 to April 6, 2016. The summary above covers all 1,098.

68 results from the 10 samples listed here: 42 detected, 26 not detected. Across the whole record it is 1,488 of 8,176. 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 2 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 Bayou Water Assn., every result from 441 to 450 of 1,098 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
Apr 6, 2016 14:00
Sampling point
TF106 Treatment Plant T106
Sample type
Routine
Lab sample
160407-004NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 6, 2016 14:00, sampling point TF106 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2016 – Dec 31, 2016
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Apr 6, 2016 14:00, sampling point TF106 Nitrate 1040 EPA method QC10107041C Jan 1, 2016 – Dec 31, 2016
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 6, 2016 14:00, sampling point TF106 Nitrite 1041 EPA method QC10107041C Jan 1, 2016 – Dec 31, 2016
Collected
Mar 9, 2016 01:00
Sampling point
SMT Location withheld
Sample type
Routine
Lab sample
160310-006TH
Laboratory
MSDH Lab
22.7 ug/l , sample collected Mar 9, 2016 01:00, sampling point SMT Chloroform 2941 EPA method 524.2 Not recorded
30.7 ug/l , sample collected Mar 9, 2016 01:00, sampling point SMT Bromoform 2942 EPA method 524.2 Not recorded
47 ug/l , sample collected Mar 9, 2016 01:00, sampling point SMT Bromodichloromethane 2943 EPA method 524.2 Not recorded
73.2 ug/l , sample collected Mar 9, 2016 01:00, sampling point SMT Dibromochloromethane 2944 EPA method 524.2 Not recorded
174 ug/l , sample collected Mar 9, 2016 01:00, sampling point SMT TTHM 2950 Jan 1, 2016 – Mar 31, 2016
Collected
Mar 9, 2016 12:45
Sampling point
SMH Location withheld
Sample type
Routine
Lab sample
160310-005TH
Laboratory
MSDH Lab
22.4 ug/l , sample collected Mar 9, 2016 12:45, sampling point SMH Chloroform 2941 EPA method 524.2 Not recorded
29.5 ug/l , sample collected Mar 9, 2016 12:45, sampling point SMH Bromoform 2942 EPA method 524.2 Not recorded
46 ug/l , sample collected Mar 9, 2016 12:45, sampling point SMH Bromodichloromethane 2943 EPA method 524.2 Not recorded
70.8 ug/l , sample collected Mar 9, 2016 12:45, sampling point SMH Dibromochloromethane 2944 EPA method 524.2 Not recorded
169 ug/l , sample collected Mar 9, 2016 12:45, sampling point SMH TTHM 2950 Jan 1, 2016 – Mar 31, 2016
Collected
Mar 9, 2016 01:08
Sampling point
SMT Location withheld
Sample type
Routine
Lab sample
160310-006HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Mar 9, 2016 01:08, sampling point SMT Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.011 mg/l , sample collected Mar 9, 2016 01:08, sampling point SMT Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
0.014 mg/l , sample collected Mar 9, 2016 01:08, sampling point SMT Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
0.003 mg/l , sample collected Mar 9, 2016 01:08, sampling point SMT Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
0.017 mg/l , sample collected Mar 9, 2016 01:08, sampling point SMT Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.045 mg/l , sample collected Mar 9, 2016 01:08, sampling point SMT Total Haloacetic Acids (Haa5) 2456 Jan 1, 2016 – Mar 31, 2016
Collected
Mar 9, 2016 12:45
Sampling point
SMH Location withheld
Sample type
Routine
Lab sample
160310-005HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Mar 9, 2016 12:45, sampling point SMH Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.012 mg/l , sample collected Mar 9, 2016 12:45, sampling point SMH Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
0.014 mg/l , sample collected Mar 9, 2016 12:45, sampling point SMH Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
0.002 mg/l , sample collected Mar 9, 2016 12:45, sampling point SMH Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
0.018 mg/l , sample collected Mar 9, 2016 12:45, sampling point SMH Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.046 mg/l , sample collected Mar 9, 2016 12:45, sampling point SMH Total Haloacetic Acids (Haa5) 2456 Jan 1, 2016 – Mar 31, 2016
Collected
Dec 9, 2015 03:30
Sampling point
SMT Location withheld
Sample type
Routine
Lab sample
151210-010TH
Laboratory
MSDH Lab
29.1 ug/l , sample collected Dec 9, 2015 03:30, sampling point SMT Chloroform 2941 EPA method 524.2 Not recorded
24.6 ug/l , sample collected Dec 9, 2015 03:30, sampling point SMT Bromoform 2942 EPA method 524.2 Not recorded
62.2 ug/l , sample collected Dec 9, 2015 03:30, sampling point SMT Bromodichloromethane 2943 EPA method 524.2 Not recorded
84.6 ug/l , sample collected Dec 9, 2015 03:30, sampling point SMT Dibromochloromethane 2944 EPA method 524.2 Not recorded
200.5 ug/l , sample collected Dec 9, 2015 03:30, sampling point SMT TTHM 2950 Oct 1, 2015 – Dec 31, 2015
Collected
Dec 9, 2015 03:15
Sampling point
SMH Location withheld
Sample type
Routine
Lab sample
151210-009TH
Laboratory
MSDH Lab
28.8 ug/l , sample collected Dec 9, 2015 03:15, sampling point SMH Chloroform 2941 EPA method 524.2 Not recorded
24 ug/l , sample collected Dec 9, 2015 03:15, sampling point SMH Bromoform 2942 EPA method 524.2 Not recorded
62 ug/l , sample collected Dec 9, 2015 03:15, sampling point SMH Bromodichloromethane 2943 EPA method 524.2 Not recorded
84.6 ug/l , sample collected Dec 9, 2015 03:15, sampling point SMH Dibromochloromethane 2944 EPA method 524.2 Not recorded
199 ug/l , sample collected Dec 9, 2015 03:15, sampling point SMH TTHM 2950 Oct 1, 2015 – Dec 31, 2015
Collected
Dec 9, 2015 03:30
Sampling point
SMT Location withheld
Sample type
Routine
Lab sample
151210-010HA
Laboratory
MSDH Lab
0.027 mg/l , sample collected Dec 9, 2015 03:30, sampling point SMT Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.01 mg/l , sample collected Dec 9, 2015 03:30, sampling point SMT Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
0.013 mg/l , sample collected Dec 9, 2015 03:30, sampling point SMT Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
0.008 mg/l , sample collected Dec 9, 2015 03:30, sampling point SMT Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
0.012 mg/l , sample collected Dec 9, 2015 03:30, sampling point SMT Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.07 mg/l , sample collected Dec 9, 2015 03:30, sampling point SMT Total Haloacetic Acids (Haa5) 2456 Oct 1, 2015 – Dec 31, 2015
Collected
Dec 9, 2015 03:15
Sampling point
SMH Location withheld
Sample type
Routine
Lab sample
151210-009HA
Laboratory
MSDH Lab
0.013 mg/l , sample collected Dec 9, 2015 03:15, sampling point SMH Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.01 mg/l , sample collected Dec 9, 2015 03:15, sampling point SMH Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
0.011 mg/l , sample collected Dec 9, 2015 03:15, sampling point SMH Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
0.009 mg/l , sample collected Dec 9, 2015 03:15, sampling point SMH Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
0.011 mg/l , sample collected Dec 9, 2015 03:15, sampling point SMH Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.05 mg/l , sample collected Dec 9, 2015 03:15, sampling point SMH Total Haloacetic Acids (Haa5) 2456 Oct 1, 2015 – Dec 31, 2015
Collected
Oct 14, 2015 03:15
Sampling point
TF112 Treatment Plant T103
Sample type
Routine
Lab sample
151015-013VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 14, 2015 03:15, sampling point TF112 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2015 – Dec 31, 2015
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 14, 2015 03:15, sampling point TF112 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2015 – Dec 31, 2015
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 14, 2015 03:15, sampling point TF112 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2015 – Dec 31, 2015
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 14, 2015 03:15, sampling point TF112 Dichloromethane 2964 EPA method 524.2 Jan 1, 2015 – Dec 31, 2015
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 14, 2015 03:15, sampling point TF112 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2015 – Dec 31, 2015
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 14, 2015 03:15, sampling point TF112 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2015 – Dec 31, 2015
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 14, 2015 03:15, sampling point TF112 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2015 – Dec 31, 2015
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 14, 2015 03:15, sampling point TF112 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2015 – Dec 31, 2015
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 14, 2015 03:15, sampling point TF112 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2015 – Dec 31, 2015
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 14, 2015 03:15, sampling point TF112 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2015 – Dec 31, 2015
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 14, 2015 03:15, sampling point TF112 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2015 – Dec 31, 2015
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 14, 2015 03:15, sampling point TF112 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2015 – Dec 31, 2015
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 14, 2015 03:15, sampling point TF112 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2015 – Dec 31, 2015
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 14, 2015 03:15, sampling point TF112 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2015 – Dec 31, 2015
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 14, 2015 03:15, sampling point TF112 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2015 – Dec 31, 2015
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 14, 2015 03:15, sampling point TF112 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2015 – Dec 31, 2015
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 14, 2015 03:15, sampling point TF112 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2015 – Dec 31, 2015
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 14, 2015 03:15, sampling point TF112 Benzene 2990 EPA method 524.2 Jan 1, 2015 – Dec 31, 2015
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 14, 2015 03:15, sampling point TF112 Toluene 2991 EPA method 524.2 Jan 1, 2015 – Dec 31, 2015
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 14, 2015 03:15, sampling point TF112 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2015 – Dec 31, 2015
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 14, 2015 03:15, sampling point TF112 Styrene 2996 EPA method 524.2 Jan 1, 2015 – Dec 31, 2015

Routine (10).