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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

MS0500001 , Central W/A-Arlington

34 of the 71 analytes this system has been tested for have been detected at least once, across 149 samples on record.

The other 37 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 149 samples on record, detections range from October 8, 2003 to November 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 Central W/A-Arlington, 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 60 of 60 results Jun 12, 2007 Sep 12, 2023
Lead 1030 Inorganic Chemical 21 of 60 results Jun 12, 2007 Sep 12, 2023
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 16 of 17 results Aug 30, 2007 Nov 18, 2025
TTHM 2950 Organic Chemical 16 of 16 results Jul 21, 2004 Nov 12, 2024
Dichloroacetic Acid 2451 Organic Chemical 12 of 12 results Aug 30, 2007 Nov 18, 2025
Trichloroacetic Acid 2452 Organic Chemical 11 of 12 results Aug 30, 2007 Nov 18, 2025
Chloroform 2941 Organic Chemical 11 of 11 results Aug 30, 2007 Nov 12, 2024
Bromodichloromethane 2943 Organic Chemical 11 of 11 results Aug 30, 2007 Nov 12, 2024
Dibromochloromethane 2944 Organic Chemical 11 of 11 results Aug 30, 2007 Nov 12, 2024
Barium 1010 Inorganic Chemical 9 of 9 results Oct 8, 2003 Mar 18, 2025
Nickel 1036 Inorganic Chemical 6 of 9 results Mar 10, 2004 Mar 18, 2025
Fluoride 1025 Inorganic Chemical 5 of 11 results Oct 8, 2003 Mar 18, 2025
Sodium 1052 Inorganic Chemical 5 of 5 results Apr 7, 2017 Feb 25, 2025
Gross Alpha, Incl. Radon & U 4002 Radionuclide 5 of 5 results Dec 13, 2011 Jul 18, 2012
Dibromoacetic Acid 2454 Organic Chemical 4 of 12 results Aug 30, 2007 Nov 18, 2025
Sulfate 1055 Inorganic Chemical 4 of 4 results Oct 8, 2003 Apr 7, 2017
Chromium 1020 Inorganic Chemical 4 of 9 results Oct 8, 2003 Mar 7, 2016
Calcium 1016 Inorganic Chemical 2 of 2 results Apr 7, 2017 Apr 7, 2017
Chloride 1017 Inorganic Chemical 2 of 2 results Apr 7, 2017 Apr 7, 2017
Iron 1028 Inorganic Chemical 2 of 2 results Apr 7, 2017 Apr 7, 2017
Magnesium 1031 Inorganic Chemical 2 of 2 results Apr 7, 2017 Apr 7, 2017
Manganese 1032 Inorganic Chemical 2 of 2 results Apr 7, 2017 Apr 7, 2017
Potassium 1042 Inorganic Chemical 2 of 2 results Apr 7, 2017 Apr 7, 2017
Residue, Total, Filterable 1057 Water Quality 2 of 2 results Apr 7, 2017 Apr 7, 2017
Color 1905 Water Quality 2 of 2 results Apr 7, 2017 Apr 7, 2017
Hardness, Total (As Caco3) 1915 Water Quality 2 of 2 results Apr 7, 2017 Apr 7, 2017
Alkalinity, Total 1927 Water Quality 2 of 2 results Apr 7, 2017 Apr 7, 2017
Iron, Field Result FEFD Inorganic Chemical 2 of 2 results Apr 7, 2017 Apr 7, 2017
Calculated Sodium NACA Water Quality 2 of 2 results Apr 7, 2017 Apr 7, 2017
PH, Field Result PHFD Water Quality 2 of 2 results Apr 7, 2017 Apr 7, 2017
Selenium 1045 Inorganic Chemical 2 of 9 results Mar 10, 2004 Apr 4, 2005
Monobromoacetic Acid 2453 Organic Chemical 1 of 12 results Sep 21, 2020 Sep 21, 2020
Alkalinity, Caco3 Stability 1067 Water Quality 1 of 1 result Apr 7, 2017 Apr 7, 2017
Carbon Dioxide 1901 Water Quality 1 of 1 result Apr 7, 2017 Apr 7, 2017

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 149 samples, newest first — collected June 6, 2022 to September 12, 2023. The summary above covers all 149.

46 results from the 10 samples listed here: 11 detected, 35 not detected. Across the whole record it is 242 of 642. 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 4 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 Central W/A-Arlington, every result from 21 to 30 of 149 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
Sep 12, 2023 08:25
Sampling point
LC0004 Location withheld
Sample type
Routine
Lab sample
PB-230913-194
Laboratory
MSDH Lab
0.266 mg/l , sample collected Sep 12, 2023 08:25, sampling point LC0004 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 12, 2023 08:25, sampling point LC0004 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Sep 12, 2023 07:00
Sampling point
LC0011 Location withheld
Sample type
Routine
Lab sample
PB-230913-193
Laboratory
MSDH Lab
0.0218 mg/l , sample collected Sep 12, 2023 07:00, sampling point LC0011 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
0.9 ug/l , sample collected Sep 12, 2023 07:00, sampling point LC0011 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Sep 12, 2023 09:11
Sampling point
LC0008 Location withheld
Sample type
Routine
Lab sample
PB-230913-192
Laboratory
MSDH Lab
0.0943 mg/l , sample collected Sep 12, 2023 09:11, sampling point LC0008 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 12, 2023 09:11, sampling point LC0008 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Sep 12, 2023 09:15
Sampling point
LC0010 Location withheld
Sample type
Routine
Lab sample
PB-230913-191
Laboratory
MSDH Lab
0.187 mg/l , sample collected Sep 12, 2023 09:15, sampling point LC0010 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
0.5 ug/l , sample collected Sep 12, 2023 09:15, sampling point LC0010 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Jun 26, 2023 12:15
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
HA-230627-013
Laboratory
MSDH Lab
8.83 ug/l , sample collected Jun 26, 2023 12:15, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Not recorded
Collected
Jun 26, 2023 12:16
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
TH-230627-013
Laboratory
MSDH Lab
19.5 ug/l , sample collected Jun 26, 2023 12:16, sampling point MRT000 TTHM 2950 EPA method 524.2 Not recorded
Collected
Feb 27, 2023 14:45
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
NI-230228-091
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 27, 2023 14:45, sampling point TF080 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Feb 27, 2023 14:45, sampling point TF080 Nitrate 1040 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 27, 2023 14:45, sampling point TF080 Nitrite 1041 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Collected
Oct 3, 2022 15:20
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
IN-221004-003
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 3, 2022 15:20, sampling point TF080 Arsenic 1005 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.0598 mg/l , sample collected Oct 3, 2022 15:20, sampling point TF080 Barium 1010 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 3, 2022 15:20, sampling point TF080 Cadmium 1015 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 3, 2022 15:20, sampling point TF080 Chromium 1020 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Oct 3, 2022 15:20, sampling point TF080 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 Oct 3, 2022 15:20, sampling point TF080 Mercury 1035 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.0011 mg/l , sample collected Oct 3, 2022 15:20, sampling point TF080 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Oct 3, 2022 15:20, sampling point TF080 Selenium 1045 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 3, 2022 15:20, sampling point TF080 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 Oct 3, 2022 15:20, sampling point TF080 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 Oct 3, 2022 15:20, sampling point TF080 Thallium, Total 1085 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Collected
Jul 26, 2022 15:15
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
VO-220727-023
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 26, 2022 15:15, sampling point TF080 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 Jul 26, 2022 15:15, sampling point TF080 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 Jul 26, 2022 15:15, sampling point TF080 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 Jul 26, 2022 15:15, sampling point TF080 Dichloromethane 2964 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 26, 2022 15:15, sampling point TF080 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 Jul 26, 2022 15:15, sampling point TF080 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 Jul 26, 2022 15:15, sampling point TF080 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 Jul 26, 2022 15:15, sampling point TF080 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 Jul 26, 2022 15:15, sampling point TF080 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 Jul 26, 2022 15:15, sampling point TF080 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 Jul 26, 2022 15:15, sampling point TF080 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 Jul 26, 2022 15:15, sampling point TF080 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 Jul 26, 2022 15:15, sampling point TF080 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 Jul 26, 2022 15:15, sampling point TF080 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 26, 2022 15:15, sampling point TF080 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 Jul 26, 2022 15:15, sampling point TF080 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 26, 2022 15:15, sampling point TF080 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 26, 2022 15:15, sampling point TF080 Benzene 2990 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 26, 2022 15:15, sampling point TF080 Toluene 2991 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 26, 2022 15:15, sampling point TF080 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 26, 2022 15:15, sampling point TF080 Styrene 2996 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Collected
Jun 6, 2022 14:40
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
HA-220607-007
Laboratory
MSDH Lab
8.87 ug/l , sample collected Jun 6, 2022 14:40, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Not recorded

Routine (10).