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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

MS0560006 , Arlington W/A

22 of the 57 analytes this system has been tested for have been detected at least once, across 179 samples on record.

The other 35 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 179 samples on record, detections range from October 15, 2003 to May 13, 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 Arlington 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 76 of 76 results Aug 9, 2007 Aug 13, 2024
Lead 1030 Inorganic Chemical 18 of 76 results Aug 9, 2007 Aug 13, 2024
TTHM 2950 Organic Chemical 16 of 20 results Aug 2, 2004 May 13, 2026
Barium 1010 Inorganic Chemical 15 of 15 results Oct 15, 2003 Apr 9, 2025
Fluoride 1025 Inorganic Chemical 11 of 15 results Oct 15, 2003 Feb 14, 2024
Bromodichloromethane 2943 Organic Chemical 9 of 14 results Feb 21, 2024 May 13, 2026
Dibromochloromethane 2944 Organic Chemical 9 of 14 results Feb 21, 2024 May 13, 2026
Chromium 1020 Inorganic Chemical 8 of 15 results Oct 15, 2003 Apr 9, 2025
Bromoform 2942 Organic Chemical 7 of 14 results Feb 21, 2024 Nov 20, 2024
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 6 of 21 results Jun 21, 2010 Feb 5, 2025
Chloroform 2941 Organic Chemical 6 of 14 results Feb 21, 2024 Nov 20, 2024
Arsenic 1005 Inorganic Chemical 6 of 15 results Dec 15, 2020 Feb 14, 2024
Gross Alpha, Incl. Radon & U 4002 Radionuclide 5 of 5 results Dec 12, 2011 Jul 20, 2012
Nickel 1036 Inorganic Chemical 3 of 15 results May 8, 2013 Apr 9, 2025
Sodium 1052 Inorganic Chemical 3 of 3 results Oct 1, 2019 Feb 25, 2025
Dichloroacetic Acid 2451 Organic Chemical 2 of 15 results Mar 4, 2020 Nov 20, 2024
Sulfate 1055 Inorganic Chemical 2 of 2 results Oct 15, 2003 Mar 15, 2004
Nitrate-Nitrite 1038 Inorganic Chemical 1 of 20 results Apr 1, 2025 Apr 1, 2025
Nitrate 1040 Inorganic Chemical 1 of 20 results Apr 1, 2025 Apr 1, 2025
Selenium 1045 Inorganic Chemical 1 of 15 results Mar 20, 2006 Mar 20, 2006
Thallium, Total 1085 Inorganic Chemical 1 of 15 results Apr 13, 2005 Apr 13, 2005
Xylenes, Total 2955 Organic Chemical 1 of 14 results May 25, 2004 May 25, 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 71–80 of 179 samples, newest first — collected December 15, 2020 to October 13, 2021. The summary above covers all 179.

54 results from the 10 samples listed here: 19 detected, 35 not detected. Across the whole record it is 207 of 882. 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 Arlington W/A, every result from 71 to 80 of 179 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
Oct 13, 2021 09:30
Sampling point
LC0015 Location withheld
Sample type
Routine
Lab sample
PB-211014-041
Laboratory
MSDH Lab
0.0145 mg/l , sample collected Oct 13, 2021 09:30, sampling point LC0015 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2021
1.3 ug/l , sample collected Oct 13, 2021 09:30, sampling point LC0015 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2021
Collected
Oct 13, 2021 06:15
Sampling point
LC0002 Location withheld
Sample type
Routine
Lab sample
PB-211015-001
Laboratory
MSDH Lab
0.282 mg/l , sample collected Oct 13, 2021 06:15, sampling point LC0002 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2021
2.4 ug/l , sample collected Oct 13, 2021 06:15, sampling point LC0002 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2021
Collected
Oct 12, 2021 12:55
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
RU-211013-020
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 12, 2021 12:55, sampling point TF101 Combined Uranium 4006 EPA method 200.8 Jan 1, 2013 – Dec 31, 2021
Collected
Oct 5, 2021 12:20
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
NI-211006-034
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Oct 5, 2021 12:20, sampling point TF101 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2021 – Dec 31, 2021
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Oct 5, 2021 12:20, sampling point TF101 Nitrate 1040 EPA method QC10107041C Jan 1, 2021 – Dec 31, 2021
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Oct 5, 2021 12:20, sampling point TF101 Nitrite 1041 EPA method QC10107041C Jan 1, 2021 – Dec 31, 2021
Collected
Sep 21, 2021 12:55
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
IN-210922-003
Laboratory
MSDH Lab
0.0012 mg/l , sample collected Sep 21, 2021 12:55, sampling point TF101 Arsenic 1005 EPA method 200.8 Jul 1, 2021 – Sep 30, 2021
0.11 mg/l , sample collected Sep 21, 2021 12:55, sampling point TF101 Barium 1010 EPA method 200.8 Jul 1, 2021 – Sep 30, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 21, 2021 12:55, sampling point TF101 Cadmium 1015 EPA method 200.8 Jul 1, 2021 – Sep 30, 2021
0.0007 mg/l , sample collected Sep 21, 2021 12:55, sampling point TF101 Chromium 1020 EPA method 200.8 Jul 1, 2021 – Sep 30, 2021
0.131 mg/l , sample collected Sep 21, 2021 12:55, sampling point TF101 Fluoride 1025 EPA method QC 10-109-12-2-A Jul 1, 2021 – Sep 30, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 21, 2021 12:55, sampling point TF101 Mercury 1035 EPA method 200.8 Jul 1, 2021 – Sep 30, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 21, 2021 12:55, sampling point TF101 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Sep 21, 2021 12:55, sampling point TF101 Selenium 1045 EPA method 200.8 Jul 1, 2021 – Sep 30, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 21, 2021 12:55, sampling point TF101 Antimony, Total 1074 EPA method 200.8 Jul 1, 2021 – Sep 30, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 21, 2021 12:55, sampling point TF101 Beryllium, Total 1075 EPA method 200.8 Jul 1, 2021 – Sep 30, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 21, 2021 12:55, sampling point TF101 Thallium, Total 1085 EPA method 200.8 Jul 1, 2021 – Sep 30, 2021
Collected
Jun 15, 2021 13:00
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
IN-210616-015
Laboratory
MSDH Lab
0.0017 mg/l , sample collected Jun 15, 2021 13:00, sampling point TF101 Arsenic 1005 EPA method 200.8 Apr 1, 2021 – Jun 30, 2021
0.107 mg/l , sample collected Jun 15, 2021 13:00, sampling point TF101 Barium 1010 EPA method 200.8 Apr 1, 2021 – Jun 30, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 15, 2021 13:00, sampling point TF101 Cadmium 1015 EPA method 200.8 Apr 1, 2021 – Jun 30, 2021
0.0007 mg/l , sample collected Jun 15, 2021 13:00, sampling point TF101 Chromium 1020 EPA method 200.8 Apr 1, 2021 – Jun 30, 2021
0.125 mg/l , sample collected Jun 15, 2021 13:00, sampling point TF101 Fluoride 1025 EPA method QC 10-109-12-2-A Apr 1, 2021 – Jun 30, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 15, 2021 13:00, sampling point TF101 Mercury 1035 EPA method 200.8 Apr 1, 2021 – Jun 30, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 15, 2021 13:00, sampling point TF101 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Jun 15, 2021 13:00, sampling point TF101 Selenium 1045 EPA method 200.8 Apr 1, 2021 – Jun 30, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 15, 2021 13:00, sampling point TF101 Antimony, Total 1074 EPA method 200.8 Apr 1, 2021 – Jun 30, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 15, 2021 13:00, sampling point TF101 Beryllium, Total 1075 EPA method 200.8 Apr 1, 2021 – Jun 30, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 15, 2021 13:00, sampling point TF101 Thallium, Total 1085 EPA method 200.8 Apr 1, 2021 – Jun 30, 2021
Collected
Mar 24, 2021 12:05
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
IN-210325-001
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 24, 2021 12:05, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2021 – Mar 31, 2021
0.0199 mg/l , sample collected Mar 24, 2021 12:05, sampling point TF101 Barium 1010 EPA method 200.8 Jan 1, 2021 – Mar 31, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 24, 2021 12:05, sampling point TF101 Cadmium 1015 EPA method 200.8 Jan 1, 2021 – Mar 31, 2021
0.0012 mg/l , sample collected Mar 24, 2021 12:05, sampling point TF101 Chromium 1020 EPA method 200.8 Jan 1, 2021 – Mar 31, 2021
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 24, 2021 12:05, sampling point TF101 Fluoride 1025 EPA method QC 10-109-12-2-A Jan 1, 2021 – Mar 31, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 24, 2021 12:05, sampling point TF101 Mercury 1035 EPA method 200.8 Jan 1, 2021 – Mar 31, 2021
0.0017 mg/l , sample collected Mar 24, 2021 12:05, sampling point TF101 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Mar 24, 2021 12:05, sampling point TF101 Selenium 1045 EPA method 200.8 Jan 1, 2021 – Mar 31, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 24, 2021 12:05, sampling point TF101 Antimony, Total 1074 EPA method 200.8 Jan 1, 2021 – Mar 31, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 24, 2021 12:05, sampling point TF101 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2021 – Mar 31, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 24, 2021 12:05, sampling point TF101 Thallium, Total 1085 EPA method 200.8 Jan 1, 2021 – Mar 31, 2021
Collected
Mar 24, 2021 15:30
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
TH-210325-001
Laboratory
MSDH Lab
2.89 ug/l , sample collected Mar 24, 2021 15:30, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2021 – Dec 31, 2021
Collected
Mar 24, 2021 15:00
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
HA-210325-001
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Mar 24, 2021 15:00, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2021 – Dec 31, 2021
Collected
Dec 15, 2020 14:08
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
IN-201216-002
Laboratory
MSDH Lab
0.0018 mg/l , sample collected Dec 15, 2020 14:08, sampling point TF101 Arsenic 1005 EPA method 200.8 Oct 1, 2020 – Dec 31, 2020
0.0189 mg/l , sample collected Dec 15, 2020 14:08, sampling point TF101 Barium 1010 EPA method 200.8 Oct 1, 2020 – Dec 31, 2020
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Dec 15, 2020 14:08, sampling point TF101 Cadmium 1015 EPA method 200.8 Oct 1, 2020 – Dec 31, 2020
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Dec 15, 2020 14:08, sampling point TF101 Chromium 1020 EPA method 200.8 Oct 1, 2020 – Dec 31, 2020
0.152 mg/l , sample collected Dec 15, 2020 14:08, sampling point TF101 Fluoride 1025 EPA method QC 10-109-12-2-A Oct 1, 2020 – Dec 31, 2020
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Dec 15, 2020 14:08, sampling point TF101 Mercury 1035 EPA method 200.8 Oct 1, 2020 – Dec 31, 2020
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Dec 15, 2020 14:08, sampling point TF101 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Dec 15, 2020 14:08, sampling point TF101 Selenium 1045 EPA method 200.8 Oct 1, 2020 – Dec 31, 2020
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Dec 15, 2020 14:08, sampling point TF101 Antimony, Total 1074 EPA method 200.8 Oct 1, 2020 – Dec 31, 2020
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Dec 15, 2020 14:08, sampling point TF101 Beryllium, Total 1075 EPA method 200.8 Oct 1, 2020 – Dec 31, 2020
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Dec 15, 2020 14:08, sampling point TF101 Thallium, Total 1085 EPA method 200.8 Oct 1, 2020 – Dec 31, 2020

Routine (10).