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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

MS0180014 , Brooklyn Water Association

20 of the 58 analytes this system has been tested for have been detected at least once, across 305 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 305 samples on record, detections range from November 23, 1993 to February 3, 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 Brooklyn Water Association, 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
Lead 1030 Inorganic Chemical 106 of 129 results Nov 23, 1993 Jul 11, 2023
Copper, Free 1022 Inorganic Chemical 92 of 129 results Nov 23, 1993 Jul 11, 2023
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 24 of 25 results Aug 2, 2007 Apr 26, 2023
TTHM 2950 Organic Chemical 23 of 24 results May 19, 2004 Apr 26, 2023
Barium 1010 Inorganic Chemical 20 of 20 results Sep 29, 2003 Feb 3, 2025
Fluoride 1025 Inorganic Chemical 19 of 20 results Sep 29, 2003 Feb 3, 2025
Chloroform 2941 Organic Chemical 16 of 17 results Aug 2, 2007 Nov 7, 2017
Bromodichloromethane 2943 Organic Chemical 15 of 17 results Aug 2, 2007 Nov 7, 2017
Dichloroacetic Acid 2451 Organic Chemical 12 of 17 results Feb 26, 2009 Dec 2, 2020
Dibromochloromethane 2944 Organic Chemical 12 of 17 results Aug 2, 2007 Nov 17, 2011
Chromium 1020 Inorganic Chemical 11 of 20 results Sep 29, 2003 Feb 3, 2025
Trichloroacetic Acid 2452 Organic Chemical 10 of 17 results Feb 26, 2009 Dec 2, 2020
Gross Alpha, Incl. Radon & U 4002 Radionuclide 10 of 10 results Mar 7, 2012 Oct 24, 2012
Sodium 1052 Inorganic Chemical 6 of 6 results Oct 6, 2019 Jan 29, 2024
Nickel 1036 Inorganic Chemical 4 of 20 results Apr 9, 2008 Feb 3, 2025
Sulfate 1055 Inorganic Chemical 4 of 4 results Sep 29, 2003 Feb 4, 2004
Cadmium 1015 Inorganic Chemical 2 of 20 results Mar 9, 2005 Mar 9, 2005
Selenium 1045 Inorganic Chemical 2 of 20 results Mar 9, 2005 Mar 9, 2005
Monochloroacetic Acid 2450 Organic Chemical 1 of 17 results Sep 30, 2009 Sep 30, 2009
Dibromoacetic Acid 2454 Organic Chemical 1 of 17 results Sep 30, 2009 Sep 30, 2009

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 305 samples, newest first — collected March 1, 2022 to April 26, 2023. The summary above covers all 305.

74 results from the 10 samples listed here: 8 detected, 66 not detected. Across the whole record it is 390 of 1,191. 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 Brooklyn Water Association, every result from 21 to 30 of 305 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 26, 2023 13:30
Sampling point
SMH Location withheld
Sample type
Routine
Lab sample
TH-230427-004
Laboratory
MSDH Lab
5.84 ug/l , sample collected Apr 26, 2023 13:30, sampling point SMH TTHM 2950 EPA method 524.2 Not recorded
Collected
Apr 26, 2023 14:00
Sampling point
SMT Location withheld
Sample type
Routine
Lab sample
HA-230427-005
Laboratory
MSDH Lab
7.86 ug/l , sample collected Apr 26, 2023 14:00, sampling point SMT Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Not recorded
Collected
Apr 26, 2023 13:30
Sampling point
SMH Location withheld
Sample type
Routine
Lab sample
HA-230427-004
Laboratory
MSDH Lab
7.98 ug/l , sample collected Apr 26, 2023 13:30, sampling point SMH Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Not recorded
Collected
Jan 30, 2023 12:45
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
NI-230131-002
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 30, 2023 12:45, sampling point TF103 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 30, 2023 12:45, sampling point TF103 Nitrate 1040 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 30, 2023 12:45, sampling point TF103 Nitrite 1041 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Collected
Jan 30, 2023 12:45
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
NI-230131-001
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 30, 2023 12:45, 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 30, 2023 12:45, 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 30, 2023 12:45, sampling point TF102 Nitrite 1041 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Collected
May 23, 2022 12:15
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
IN-220524-005
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 23, 2022 12:15, sampling point TF103 Arsenic 1005 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.0032 mg/l , sample collected May 23, 2022 12:15, sampling point TF103 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 23, 2022 12:15, sampling point TF103 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 23, 2022 12:15, sampling point TF103 Chromium 1020 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.248 mg/l , sample collected May 23, 2022 12:15, sampling point TF103 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 23, 2022 12:15, sampling point TF103 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 23, 2022 12:15, sampling point TF103 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected May 23, 2022 12:15, sampling point TF103 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 23, 2022 12:15, sampling point TF103 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 23, 2022 12:15, sampling point TF103 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 23, 2022 12:15, sampling point TF103 Thallium, Total 1085 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Collected
May 23, 2022 12:20
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
IN-220524-004
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 23, 2022 12:20, sampling point TF102 Arsenic 1005 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.0032 mg/l , sample collected May 23, 2022 12:20, 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 23, 2022 12:20, 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 23, 2022 12:20, sampling point TF102 Chromium 1020 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.258 mg/l , sample collected May 23, 2022 12:20, 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 23, 2022 12:20, 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 23, 2022 12:20, sampling point TF102 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected May 23, 2022 12:20, 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 23, 2022 12:20, 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 23, 2022 12:20, 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 23, 2022 12:20, sampling point TF102 Thallium, Total 1085 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Collected
May 3, 2022 12:58
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
VO-220504-006
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 3, 2022 12:58, sampling point TF103 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 May 3, 2022 12:58, sampling point TF103 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 May 3, 2022 12:58, sampling point TF103 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 May 3, 2022 12:58, sampling point TF103 Dichloromethane 2964 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 3, 2022 12:58, sampling point TF103 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 May 3, 2022 12:58, sampling point TF103 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 May 3, 2022 12:58, sampling point TF103 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 May 3, 2022 12:58, sampling point TF103 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 May 3, 2022 12:58, sampling point TF103 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 May 3, 2022 12:58, sampling point TF103 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 May 3, 2022 12:58, sampling point TF103 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 May 3, 2022 12:58, sampling point TF103 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 May 3, 2022 12:58, sampling point TF103 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 May 3, 2022 12:58, sampling point TF103 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 3, 2022 12:58, sampling point TF103 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 May 3, 2022 12:58, sampling point TF103 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 3, 2022 12:58, sampling point TF103 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 3, 2022 12:58, sampling point TF103 Benzene 2990 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 3, 2022 12:58, sampling point TF103 Toluene 2991 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 3, 2022 12:58, sampling point TF103 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 3, 2022 12:58, sampling point TF103 Styrene 2996 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Collected
May 3, 2022 13:00
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
VO-220504-005
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 3, 2022 13:00, 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 May 3, 2022 13:00, 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 May 3, 2022 13:00, 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 May 3, 2022 13:00, 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 May 3, 2022 13:00, 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 May 3, 2022 13:00, 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 May 3, 2022 13:00, 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 May 3, 2022 13:00, 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 May 3, 2022 13:00, 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 May 3, 2022 13:00, 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 May 3, 2022 13:00, 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 May 3, 2022 13:00, 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 May 3, 2022 13:00, 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 May 3, 2022 13:00, 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 May 3, 2022 13:00, 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 May 3, 2022 13:00, 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 May 3, 2022 13:00, 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 May 3, 2022 13:00, 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 May 3, 2022 13:00, 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 May 3, 2022 13:00, 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 May 3, 2022 13:00, sampling point TF102 Styrene 2996 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Collected
Mar 1, 2022 12:50
Sampling point
SMT Location withheld
Sample type
Routine
Lab sample
HA-220302-022
Laboratory
MSDH Lab
4.72 ug/l , sample collected Mar 1, 2022 12:50, sampling point SMT Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2022 – Dec 31, 2022

Routine (10).