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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

MS0540067 , Concord-Macedonia W/A

26 of the 57 analytes this system has been tested for have been detected at least once, across 207 samples on record.

The other 31 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 207 samples on record, detections range from October 13, 2003 to March 18, 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 Concord-Macedonia W/A, 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 52 of 52 results Jul 9, 2007 Sep 19, 2023
Lead 1030 Inorganic Chemical 38 of 52 results Jul 9, 2007 Sep 19, 2023
Barium 1010 Inorganic Chemical 20 of 20 results Oct 13, 2003 Mar 18, 2025
Fluoride 1025 Inorganic Chemical 20 of 20 results Oct 13, 2003 Mar 18, 2025
Chromium 1020 Inorganic Chemical 12 of 20 results Oct 13, 2003 Mar 9, 2016
TTHM 2950 Organic Chemical 10 of 12 results Jul 26, 2004 Dec 13, 2022
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 9 of 12 results Jul 26, 2004 Dec 13, 2022
Arsenic 1005 Inorganic Chemical 8 of 20 results Oct 13, 2003 Oct 11, 2022
Selenium 1045 Inorganic Chemical 8 of 20 results Oct 13, 2003 Mar 22, 2006
Chloroform 2941 Organic Chemical 5 of 6 results Jun 13, 2007 Aug 22, 2017
Dibromochloromethane 2944 Organic Chemical 5 of 6 results Jun 13, 2007 Aug 22, 2017
Gross Alpha, Incl. Radon & U 4002 Radionuclide 5 of 10 results Dec 15, 2011 Jul 17, 2012
Dichloroacetic Acid 2451 Organic Chemical 4 of 5 results Jul 1, 2008 Aug 22, 2017
Bromodichloromethane 2943 Organic Chemical 4 of 6 results Jun 13, 2007 Aug 22, 2017
Nitrate-Nitrite 1038 Inorganic Chemical 3 of 45 results Dec 4, 2019 Mar 9, 2022
Nitrate 1040 Inorganic Chemical 3 of 45 results Dec 4, 2019 Mar 9, 2022
Nickel 1036 Inorganic Chemical 3 of 20 results Mar 22, 2006 Apr 29, 2013
Xylenes, Total 2955 Organic Chemical 3 of 26 results May 24, 2004 Jul 30, 2009
Sodium 1052 Inorganic Chemical 2 of 2 results Sep 19, 2019 Sep 19, 2019
Dibromoacetic Acid 2454 Organic Chemical 2 of 5 results Jul 1, 2008 Aug 22, 2017
Bromoform 2942 Organic Chemical 2 of 6 results Jun 13, 2007 Aug 22, 2017
Cadmium 1015 Inorganic Chemical 2 of 20 results Apr 11, 2005 Apr 11, 2005
Dichloromethane 2964 Organic Chemical 2 of 26 results Aug 25, 2004 Aug 25, 2004
Trichloroacetic Acid 2452 Organic Chemical 1 of 5 results Aug 22, 2017 Aug 22, 2017
Toluene 2991 Organic Chemical 1 of 26 results Sep 12, 2007 Sep 12, 2007
Ethylbenzene 2992 Organic Chemical 1 of 26 results Sep 12, 2007 Sep 12, 2007

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 1–10 of 207 samples, newest first — collected April 2, 2024 to February 24, 2026. The summary above covers all 207.

60 results from the 10 samples listed here: 4 detected, 56 not detected. Across the whole record it is 225 of 1,154. 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 Concord-Macedonia W/A, every result from 1 to 10 of 207 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
Feb 24, 2026 13:08
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
NI-260225-001
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 24, 2026 13:08, sampling point TF101 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2026 – Dec 31, 2026
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Feb 24, 2026 13:08, sampling point TF101 Nitrate 1040 EPA method QC10107041C Jan 1, 2026 – Dec 31, 2026
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 24, 2026 13:08, sampling point TF101 Nitrite 1041 EPA method QC10107041C Jan 1, 2026 – Dec 31, 2026
Collected
Oct 1, 2025 07:05
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
CN-251002-017
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Oct 1, 2025 07:05, sampling point TF102 Cyanide 1024 EPA method QC10204001X Jan 1, 2023 – Dec 31, 2025
Collected
Oct 1, 2025 06:55
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
CN-251002-018
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Oct 1, 2025 06:55, sampling point TF101 Cyanide 1024 EPA method QC10204001X Jan 1, 2023 – Dec 31, 2025
Collected
Mar 25, 2025 12:34
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
NI-250326-053
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 25, 2025 12:34, sampling point TF102 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 25, 2025 12:34, sampling point TF102 Nitrate 1040 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 25, 2025 12:34, sampling point TF102 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Collected
Mar 25, 2025 12:20
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
NI-250326-054
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 25, 2025 12:20, sampling point TF101 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 25, 2025 12:20, sampling point TF101 Nitrate 1040 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 25, 2025 12:20, sampling point TF101 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Collected
Mar 18, 2025 10:29
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
IN-250319-044
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 18, 2025 10:29, sampling point TF102 Arsenic 1005 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.0147 mg/l , sample collected Mar 18, 2025 10:29, sampling point TF102 Barium 1010 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 18, 2025 10:29, sampling point TF102 Cadmium 1015 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 18, 2025 10:29, sampling point TF102 Chromium 1020 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.188 mg/l , sample collected Mar 18, 2025 10:29, sampling point TF102 Fluoride 1025 EPA method QC 10-109-12-2-A Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 18, 2025 10:29, sampling point TF102 Mercury 1035 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 18, 2025 10:29, sampling point TF102 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Mar 18, 2025 10:29, sampling point TF102 Selenium 1045 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 18, 2025 10:29, sampling point TF102 Antimony, Total 1074 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 18, 2025 10:29, sampling point TF102 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 18, 2025 10:29, sampling point TF102 Thallium, Total 1085 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Mar 18, 2025 10:17
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
IN-250319-043
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 18, 2025 10:17, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.0141 mg/l , sample collected Mar 18, 2025 10:17, sampling point TF101 Barium 1010 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 18, 2025 10:17, sampling point TF101 Cadmium 1015 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 18, 2025 10:17, sampling point TF101 Chromium 1020 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.196 mg/l , sample collected Mar 18, 2025 10:17, sampling point TF101 Fluoride 1025 EPA method QC 10-109-12-2-A Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 18, 2025 10:17, sampling point TF101 Mercury 1035 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 18, 2025 10:17, sampling point TF101 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Mar 18, 2025 10:17, sampling point TF101 Selenium 1045 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 18, 2025 10:17, sampling point TF101 Antimony, Total 1074 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 18, 2025 10:17, sampling point TF101 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 18, 2025 10:17, sampling point TF101 Thallium, Total 1085 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Jun 25, 2024 07:05
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
VO-240626-004
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2024 07:05, sampling point TF101 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2019 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2024 07:05, sampling point TF101 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2019 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2024 07:05, sampling point TF101 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2019 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2024 07:05, sampling point TF101 Dichloromethane 2964 EPA method 524.2 Jan 1, 2019 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2024 07:05, sampling point TF101 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2019 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2024 07:05, sampling point TF101 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2019 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2024 07:05, sampling point TF101 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2019 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2024 07:05, sampling point TF101 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2019 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2024 07:05, sampling point TF101 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2019 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2024 07:05, sampling point TF101 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2019 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2024 07:05, sampling point TF101 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2019 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2024 07:05, sampling point TF101 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2019 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2024 07:05, sampling point TF101 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2019 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2024 07:05, sampling point TF101 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2019 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2024 07:05, sampling point TF101 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2019 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2024 07:05, sampling point TF101 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2019 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2024 07:05, sampling point TF101 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2019 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2024 07:05, sampling point TF101 Benzene 2990 EPA method 524.2 Jan 1, 2019 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2024 07:05, sampling point TF101 Toluene 2991 EPA method 524.2 Jan 1, 2019 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2024 07:05, sampling point TF101 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2019 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2024 07:05, sampling point TF101 Styrene 2996 EPA method 524.2 Jan 1, 2019 – Dec 31, 2024
Collected
Apr 2, 2024 07:05
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
NI-240403-072
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 2, 2024 07:05, sampling point TF102 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Apr 2, 2024 07:05, sampling point TF102 Nitrate 1040 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 2, 2024 07:05, sampling point TF102 Nitrite 1041 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Collected
Apr 2, 2024 07:22
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
NI-240403-071
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 2, 2024 07:22, sampling point TF101 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Apr 2, 2024 07:22, sampling point TF101 Nitrate 1040 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 2, 2024 07:22, sampling point TF101 Nitrite 1041 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024

Routine (10).