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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

MS0820010 , Midway W/A #1

37 of the 72 analytes this system has been tested for have been detected at least once, across 313 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 313 samples on record, detections range from May 20, 2004 to December 9, 2025. These figures cover the whole record; the list of samples further down is narrowed.

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 Midway W/A #1, 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
TTHM 2950 Organic Chemical 83 of 95 results Sep 22, 2004 May 9, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 81 of 90 results Sep 22, 2004 May 9, 2025
Copper, Free 1022 Inorganic Chemical 60 of 60 results Aug 21, 2007 Sep 30, 2024
Chloroform 2941 Organic Chemical 49 of 52 results May 24, 2006 Dec 15, 2020
Lead 1030 Inorganic Chemical 47 of 60 results Aug 21, 2007 Sep 30, 2024
Bromodichloromethane 2943 Organic Chemical 44 of 52 results May 24, 2006 Dec 15, 2020
Dichloroacetic Acid 2451 Organic Chemical 43 of 46 results Jul 10, 2008 Dec 15, 2020
Trichloroacetic Acid 2452 Organic Chemical 39 of 46 results Jul 10, 2008 Dec 15, 2020
Fluoride 1025 Inorganic Chemical 11 of 11 results Nov 15, 2004 Dec 9, 2025
Monochloroacetic Acid 2450 Organic Chemical 11 of 46 results Dec 14, 2009 Mar 22, 2020
Barium 1010 Inorganic Chemical 10 of 10 results Nov 15, 2004 Dec 9, 2025
Monobromoacetic Acid 2453 Organic Chemical 10 of 46 results Jun 15, 2009 Dec 15, 2020
Chromium 1020 Inorganic Chemical 7 of 10 results May 2, 2005 Dec 9, 2025
Gross Alpha, Incl. Radon & U 4002 Radionuclide 5 of 5 results Dec 12, 2011 Jul 17, 2012
Sodium 1052 Inorganic Chemical 4 of 4 results Oct 13, 2009 Mar 28, 2023
Arsenic 1005 Inorganic Chemical 2 of 10 results Dec 9, 2025 Dec 9, 2025
Calcium 1016 Inorganic Chemical 2 of 2 results Oct 13, 2009 Sep 27, 2017
Chloride 1017 Inorganic Chemical 2 of 2 results Oct 13, 2009 Sep 27, 2017
Magnesium 1031 Inorganic Chemical 2 of 2 results Oct 13, 2009 Sep 27, 2017
Manganese 1032 Inorganic Chemical 2 of 2 results Oct 13, 2009 Sep 27, 2017
Potassium 1042 Inorganic Chemical 2 of 2 results Oct 13, 2009 Sep 27, 2017
Residue, Total, Filterable 1057 Water Quality 2 of 2 results Oct 13, 2009 Sep 27, 2017
Alkalinity, Caco3 Stability 1067 Water Quality 2 of 2 results Oct 13, 2009 Sep 27, 2017
Color 1905 Water Quality 2 of 2 results Oct 13, 2009 Sep 27, 2017
Hardness, Total (As Caco3) 1915 Water Quality 2 of 2 results Oct 13, 2009 Sep 27, 2017
Alkalinity, Total 1927 Water Quality 2 of 2 results Oct 13, 2009 Sep 27, 2017
Calculated Sodium NACA Water Quality 2 of 2 results Oct 13, 2009 Sep 27, 2017
PH, Field Result PHFD Water Quality 2 of 2 results Oct 13, 2009 Sep 27, 2017
Dibromochloromethane 2944 Organic Chemical 2 of 52 results Dec 9, 2015 Dec 9, 2015
Iron 1028 Inorganic Chemical 1 of 2 results Sep 27, 2017 Sep 27, 2017
Nickel 1036 Inorganic Chemical 1 of 10 results May 10, 2010 May 10, 2010
Carbon Dioxide 1901 Water Quality 1 of 1 result Oct 13, 2009 Oct 13, 2009
Iron, Field Result FEFD Inorganic Chemical 1 of 1 result Oct 13, 2009 Oct 13, 2009
Selenium 1045 Inorganic Chemical 1 of 10 results May 2, 2005 May 2, 2005
Xylenes, Total 2955 Organic Chemical 1 of 12 results May 20, 2004 May 20, 2004
Toluene 2991 Organic Chemical 1 of 12 results May 20, 2004 May 20, 2004
Ethylbenzene 2992 Organic Chemical 1 of 12 results May 20, 2004 May 20, 2004

Showing samples collected between September 25, 2024 and September 25, 2026. That is this page’s default, not a limit on what the agency records.

Show every sample on record

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The most recent samples, result by result

The table below lists 11–20 of 34 samples, newest first — collected February 24, 2025 to September 8, 2025. The summary above covers all 34.

10 results from the 10 samples listed here: 8 detected, 2 not detected. Across the whole record it is 540 of 1,242. 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 Midway W/A #1, every result from 11 to 20 of 34 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 8, 2025 11:00
Sampling point
SMT Location withheld
Sample type
Routine
Lab sample
TH-250909-004
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 8, 2025 11:00, sampling point SMT TTHM 2950 EPA method 524.2 Jul 1, 2025 – Sep 30, 2025
Collected
Sep 8, 2025 10:45
Sampling point
SMH Location withheld
Sample type
Routine
Lab sample
TH-250909-003
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 8, 2025 10:45, sampling point SMH TTHM 2950 EPA method 524.2 Jul 1, 2025 – Sep 30, 2025
Collected
May 9, 2025 07:15
Sampling point
SMT Location withheld
Sample type
Routine
Lab sample
HA-250509-006
Laboratory
MSDH Lab
24.9 ug/l , sample collected May 9, 2025 07:15, sampling point SMT Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Apr 1, 2025 – Jun 30, 2025
Collected
May 9, 2025 07:35
Sampling point
SMH Location withheld
Sample type
Routine
Lab sample
HA-250509-005
Laboratory
MSDH Lab
29.8 ug/l , sample collected May 9, 2025 07:35, sampling point SMH Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Apr 1, 2025 – Jun 30, 2025
Collected
May 9, 2025 07:45
Sampling point
SMT Location withheld
Sample type
Routine
Lab sample
TH-250509-006
Laboratory
MSDH Lab
36.4 ug/l , sample collected May 9, 2025 07:45, sampling point SMT TTHM 2950 EPA method 524.2 Apr 1, 2025 – Jun 30, 2025
Collected
May 9, 2025 07:00
Sampling point
SMH Location withheld
Sample type
Routine
Lab sample
TH-250509-005
Laboratory
MSDH Lab
34.9 ug/l , sample collected May 9, 2025 07:00, sampling point SMH TTHM 2950 EPA method 524.2 Apr 1, 2025 – Jun 30, 2025
Collected
Feb 24, 2025 12:15
Sampling point
SMT Location withheld
Sample type
Routine
Lab sample
TH-250225-025
Laboratory
MSDH Lab
36.9 ug/l , sample collected Feb 24, 2025 12:15, sampling point SMT TTHM 2950 EPA method 524.2 Jan 1, 2025 – Mar 31, 2025
Collected
Feb 24, 2025 12:30
Sampling point
SMH Location withheld
Sample type
Routine
Lab sample
TH-250225-024
Laboratory
MSDH Lab
37.5 ug/l , sample collected Feb 24, 2025 12:30, sampling point SMH TTHM 2950 EPA method 524.2 Jan 1, 2025 – Mar 31, 2025
Collected
Feb 24, 2025 12:15
Sampling point
SMT Location withheld
Sample type
Routine
Lab sample
HA-250225-025
Laboratory
MSDH Lab
11.5 ug/l , sample collected Feb 24, 2025 12:15, sampling point SMT Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2025 – Mar 31, 2025
Collected
Feb 24, 2025 12:30
Sampling point
SMH Location withheld
Sample type
Routine
Lab sample
HA-250225-024
Laboratory
MSDH Lab
11.1 ug/l , sample collected Feb 24, 2025 12:30, sampling point SMH Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2025 – Mar 31, 2025

Routine (10).