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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 91–100 of 149 samples, newest first — collected February 13, 2012 to April 29, 2013. The summary above covers all 149.

34 results from the 10 samples listed here: 6 detected, 28 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.

Chemical and radiological sample results for Central W/A-Arlington, every result from 91 to 100 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
Apr 29, 2013 02:45
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
130430-016IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 29, 2013 02:45, sampling point TF080 Arsenic 1005 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.066 mg/l , sample collected Apr 29, 2013 02:45, sampling point TF080 Barium 1010 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 29, 2013 02:45, sampling point TF080 Cadmium 1015 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 29, 2013 02:45, sampling point TF080 Chromium 1020 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 29, 2013 02:45, sampling point TF080 Fluoride 1025 EPA method 300.0 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 29, 2013 02:45, sampling point TF080 Mercury 1035 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.0542 mg/l , sample collected Apr 29, 2013 02:45, sampling point TF080 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Apr 29, 2013 02:45, sampling point TF080 Selenium 1045 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 29, 2013 02:45, sampling point TF080 Antimony, Total 1074 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 29, 2013 02:45, sampling point TF080 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 29, 2013 02:45, sampling point TF080 Thallium, Total 1085 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Collected
Sep 24, 2012 02:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120925-004CN
Laboratory
MSDH Lab
Not detected below 15 ug/l Minimum Reporting Level , sample collected Sep 24, 2012 02:00, sampling point TF080 Cyanide 1024 EPA method QC10204001X Jan 1, 2011 – Dec 31, 2013
Collected
Jul 18, 2012 14:20
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
201211140256
Laboratory
Radiation Safety Engineering
1 pci/l , sample collected Jul 18, 2012 14:20, sampling point TF080 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.232 pci/l Minimum Reporting Level , sample collected Jul 18, 2012 14:20, sampling point TF080 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.232 pci/l Minimum Reporting Level , sample collected Jul 18, 2012 14:20, sampling point TF080 Radium-226 4020 EPA method 903.1 Jul 1, 2012 – Sep 30, 2012
Not detected below 0.22 pci/l Minimum Reporting Level , sample collected Jul 18, 2012 14:20, sampling point TF080 Radium-228 4030 EPA method 904.0 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 17, 2012 15:30
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120718-054
Laboratory
Radiation Safety Engineering
1 pci/l , sample collected Jul 17, 2012 15:30, sampling point TF080 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.232 pci/l Minimum Reporting Level , sample collected Jul 17, 2012 15:30, sampling point TF080 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.232 pci/l Minimum Reporting Level , sample collected Jul 17, 2012 15:30, sampling point TF080 Radium-226 4020 EPA method 903.1 Jul 1, 2012 – Sep 30, 2012
Not detected below 0.22 pci/l Minimum Reporting Level , sample collected Jul 17, 2012 15:30, sampling point TF080 Radium-228 4030 EPA method 904.0 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 17, 2012 15:30
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120718-054RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 17, 2012 15:30, sampling point TF080 Combined Uranium 4006 EPA method 200.8 Jul 1, 2012 – Sep 30, 2012
Collected
Apr 23, 2012 15:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120424-119
Laboratory
Radiation Safety Engineering
1 pci/l , sample collected Apr 23, 2012 15:00, sampling point TF080 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.232 pci/l Minimum Reporting Level , sample collected Apr 23, 2012 15:00, sampling point TF080 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.232 pci/l Minimum Reporting Level , sample collected Apr 23, 2012 15:00, sampling point TF080 Radium-226 4020 EPA method 903.1 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.22 pci/l Minimum Reporting Level , sample collected Apr 23, 2012 15:00, sampling point TF080 Radium-228 4030 EPA method 904.0 Apr 1, 2012 – Jun 30, 2012
Collected
Apr 23, 2012 15:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120424-119RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 23, 2012 15:00, sampling point TF080 Combined Uranium 4006 EPA method 200.8 Apr 1, 2012 – Jun 30, 2012
Collected
Mar 5, 2012 02:40
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120306-031NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 5, 2012 02:40, sampling point TF080 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 5, 2012 02:40, sampling point TF080 Nitrate 1040 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 5, 2012 02:40, sampling point TF080 Nitrite 1041 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Collected
Feb 13, 2012 13:30
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120214-061
Laboratory
Radiation Safety Engineering
1 pci/l , sample collected Feb 13, 2012 13:30, sampling point TF080 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.232 pci/l Minimum Reporting Level , sample collected Feb 13, 2012 13:30, sampling point TF080 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.232 pci/l Minimum Reporting Level , sample collected Feb 13, 2012 13:30, sampling point TF080 Radium-226 4020 EPA method 903.1 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.22 pci/l Minimum Reporting Level , sample collected Feb 13, 2012 13:30, sampling point TF080 Radium-228 4030 EPA method 904.0 Jan 1, 2012 – Mar 31, 2012
Collected
Feb 13, 2012 13:30
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120214-061RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 13, 2012 13:30, sampling point TF080 Combined Uranium 4006 EPA method 200.8 Jan 1, 2012 – Mar 31, 2012

Routine (10).