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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

MS0500009 , Central W/A-Southwest

39 of the 73 analytes this system has been tested for have been detected at least once, across 408 samples on record.

The other 34 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 408 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-Southwest, 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 160 of 160 results Jul 13, 2004 Aug 6, 2024
Lead 1030 Inorganic Chemical 94 of 160 results Jul 13, 2004 Aug 6, 2024
Barium 1010 Inorganic Chemical 24 of 24 results Oct 8, 2003 Mar 18, 2025
TTHM 2950 Organic Chemical 20 of 20 results Jul 21, 2004 Nov 18, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 19 of 20 results Aug 30, 2007 Nov 18, 2025
Sodium 1052 Inorganic Chemical 16 of 16 results May 17, 2016 Feb 25, 2025
Dichloroacetic Acid 2451 Organic Chemical 15 of 15 results Aug 30, 2007 Nov 18, 2025
Chloroform 2941 Organic Chemical 15 of 15 results Aug 30, 2007 Nov 18, 2025
Bromodichloromethane 2943 Organic Chemical 15 of 15 results Aug 30, 2007 Nov 18, 2025
Dibromochloromethane 2944 Organic Chemical 15 of 15 results Aug 30, 2007 Nov 18, 2025
Trichloroacetic Acid 2452 Organic Chemical 14 of 15 results Aug 30, 2007 Nov 18, 2025
Chromium 1020 Inorganic Chemical 14 of 24 results Oct 8, 2003 Apr 28, 2020
Fluoride 1025 Inorganic Chemical 12 of 31 results Oct 8, 2003 Mar 18, 2025
Nickel 1036 Inorganic Chemical 11 of 24 results Mar 10, 2004 Mar 18, 2025
Sulfate 1055 Inorganic Chemical 11 of 11 results Oct 8, 2003 Apr 7, 2017
Calcium 1016 Inorganic Chemical 7 of 7 results May 17, 2016 Apr 7, 2017
Chloride 1017 Inorganic Chemical 7 of 7 results May 17, 2016 Apr 7, 2017
Iron 1028 Inorganic Chemical 7 of 7 results May 17, 2016 Apr 7, 2017
Magnesium 1031 Inorganic Chemical 7 of 7 results May 17, 2016 Apr 7, 2017
Manganese 1032 Inorganic Chemical 7 of 7 results May 17, 2016 Apr 7, 2017
Potassium 1042 Inorganic Chemical 7 of 7 results May 17, 2016 Apr 7, 2017
Residue, Total, Filterable 1057 Water Quality 7 of 7 results May 17, 2016 Apr 7, 2017
Color 1905 Water Quality 7 of 7 results May 17, 2016 Apr 7, 2017
Hardness, Total (As Caco3) 1915 Water Quality 7 of 7 results May 17, 2016 Apr 7, 2017
Alkalinity, Total 1927 Water Quality 7 of 7 results May 17, 2016 Apr 7, 2017
Iron, Field Result FEFD Inorganic Chemical 7 of 7 results May 17, 2016 Apr 7, 2017
Calculated Sodium NACA Water Quality 7 of 7 results May 17, 2016 Apr 7, 2017
PH, Field Result PHFD Water Quality 7 of 7 results May 17, 2016 Apr 7, 2017
Carbon Dioxide 1901 Water Quality 6 of 6 results May 17, 2016 Apr 7, 2017
Gross Alpha, Incl. Radon & U 4002 Radionuclide 6 of 7 results Mar 12, 2012 Nov 19, 2013
Cyanide 1024 Inorganic Chemical 5 of 28 results Apr 4, 2005 Feb 24, 2021
Xylenes, Total 2955 Organic Chemical 5 of 63 results Sep 10, 2007 Aug 9, 2010
Selenium 1045 Inorganic Chemical 4 of 24 results Mar 10, 2004 Feb 24, 2010
Nitrate 1040 Inorganic Chemical 2 of 65 results Jul 19, 2006 Mar 29, 2021
Monobromoacetic Acid 2453 Organic Chemical 2 of 15 results Aug 30, 2007 Sep 21, 2020
Gross Alpha Particle Activity 4109 Radionuclide 2 of 2 results Sep 10, 2013 Sep 10, 2013
Nitrate-Nitrite 1038 Inorganic Chemical 1 of 65 results Mar 29, 2021 Mar 29, 2021
Alkalinity, Caco3 Stability 1067 Water Quality 1 of 1 result Apr 7, 2017 Apr 7, 2017
Ethylbenzene 2992 Organic Chemical 1 of 63 results Aug 9, 2010 Aug 9, 2010

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 81–90 of 408 samples, newest first — collected July 20, 2021 to July 20, 2021. The summary above covers all 408.

20 results from the 10 samples listed here: 12 detected, 8 not detected. Across the whole record it is 581 of 2,485. 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 10 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-Southwest, every result from 81 to 90 of 408 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
Jul 20, 2021 06:05
Sampling point
LC0013 Location withheld
Sample type
Routine
Lab sample
PB-210721-093
Laboratory
MSDH Lab
0.0435 mg/l , sample collected Jul 20, 2021 06:05, sampling point LC0013 Copper, Free 1022 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 20, 2021 06:05, sampling point LC0013 Lead 1030 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Collected
Jul 20, 2021 06:29
Sampling point
LC0001 Location withheld
Sample type
Routine
Lab sample
PB-210721-092
Laboratory
MSDH Lab
0.0962 mg/l , sample collected Jul 20, 2021 06:29, sampling point LC0001 Copper, Free 1022 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 20, 2021 06:29, sampling point LC0001 Lead 1030 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Collected
Jul 20, 2021 05:30
Sampling point
LC0002 Location withheld
Sample type
Routine
Lab sample
PB-210721-091
Laboratory
MSDH Lab
0.0643 mg/l , sample collected Jul 20, 2021 05:30, sampling point LC0002 Copper, Free 1022 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 20, 2021 05:30, sampling point LC0002 Lead 1030 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Collected
Jul 20, 2021 05:00
Sampling point
LC0017 Location withheld
Sample type
Routine
Lab sample
PB-210721-090
Laboratory
MSDH Lab
0.0437 mg/l , sample collected Jul 20, 2021 05:00, sampling point LC0017 Copper, Free 1022 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 20, 2021 05:00, sampling point LC0017 Lead 1030 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Collected
Jul 20, 2021 04:45
Sampling point
LC0007 Location withheld
Sample type
Routine
Lab sample
PB-210721-089
Laboratory
MSDH Lab
0.11 mg/l , sample collected Jul 20, 2021 04:45, sampling point LC0007 Copper, Free 1022 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
0.6 ug/l , sample collected Jul 20, 2021 04:45, sampling point LC0007 Lead 1030 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Collected
Jul 20, 2021 06:00
Sampling point
LC0009 Location withheld
Sample type
Routine
Lab sample
PB-210721-096
Laboratory
MSDH Lab
0.121 mg/l , sample collected Jul 20, 2021 06:00, sampling point LC0009 Copper, Free 1022 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 20, 2021 06:00, sampling point LC0009 Lead 1030 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Collected
Jul 20, 2021 06:00
Sampling point
LC0050 Location withheld
Sample type
Routine
Lab sample
PB-210721-095
Laboratory
MSDH Lab
0.0426 mg/l , sample collected Jul 20, 2021 06:00, sampling point LC0050 Copper, Free 1022 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 20, 2021 06:00, sampling point LC0050 Lead 1030 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Collected
Jul 20, 2021 04:45
Sampling point
LC0011 Location withheld
Sample type
Routine
Lab sample
PB-210721-094
Laboratory
MSDH Lab
0.392 mg/l , sample collected Jul 20, 2021 04:45, sampling point LC0011 Copper, Free 1022 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 20, 2021 04:45, sampling point LC0011 Lead 1030 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Collected
Jul 20, 2021 06:00
Sampling point
LC0030 Location withheld
Sample type
Routine
Lab sample
PB-210721-088
Laboratory
MSDH Lab
0.0812 mg/l , sample collected Jul 20, 2021 06:00, sampling point LC0030 Copper, Free 1022 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
0.5 ug/l , sample collected Jul 20, 2021 06:00, sampling point LC0030 Lead 1030 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Collected
Jul 20, 2021 07:00
Sampling point
LC0036 Location withheld
Sample type
Routine
Lab sample
PB-210721-087
Laboratory
MSDH Lab
0.153 mg/l , sample collected Jul 20, 2021 07:00, sampling point LC0036 Copper, Free 1022 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 20, 2021 07:00, sampling point LC0036 Lead 1030 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021

Routine (10).