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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

MS0300110 , Rouses

34 of the 75 analytes this system has been tested for have been detected at least once, across 108 samples on record.

The other 41 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 108 samples on record, detections range from September 22, 2003 to February 24, 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 Rouses, 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 35 of 35 results Sep 23, 2004 Jul 12, 2023
Lead 1030 Inorganic Chemical 29 of 35 results Sep 23, 2004 Jun 24, 2020
Barium 1010 Inorganic Chemical 10 of 10 results Sep 22, 2003 Feb 24, 2025
Fluoride 1025 Inorganic Chemical 10 of 11 results Sep 22, 2003 Feb 24, 2025
TTHM 2950 Organic Chemical 8 of 8 results Jun 16, 2004 Feb 12, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 6 of 8 results Sep 26, 2007 Feb 12, 2025
Arsenic 1005 Inorganic Chemical 6 of 10 results Feb 23, 2004 Apr 8, 2015
Chromium 1020 Inorganic Chemical 5 of 10 results Feb 23, 2004 May 18, 2022
Chloroform 2941 Organic Chemical 5 of 5 results Aug 9, 2007 Aug 9, 2018
Bromodichloromethane 2943 Organic Chemical 4 of 5 results Aug 9, 2007 Jun 22, 2015
Dichloroacetic Acid 2451 Organic Chemical 3 of 4 results Sep 25, 2008 Jun 22, 2015
Trichloroacetic Acid 2452 Organic Chemical 3 of 4 results Sep 25, 2008 Jun 22, 2015
Sulfate 1055 Inorganic Chemical 3 of 3 results Sep 22, 2003 Dec 2, 2008
Sodium 1052 Inorganic Chemical 2 of 2 results Dec 2, 2008 Mar 8, 2021
Dibromochloromethane 2944 Organic Chemical 2 of 5 results Aug 9, 2007 Jun 20, 2013
Gross Alpha Particle Activity 4109 Radionuclide 2 of 4 results Jun 26, 2012 Sep 12, 2012
Nickel 1036 Inorganic Chemical 2 of 10 results Feb 15, 2006 Jan 14, 2009
Selenium 1045 Inorganic Chemical 2 of 10 results Feb 23, 2004 Mar 16, 2005
Nitrite 1041 Inorganic Chemical 1 of 22 results Feb 20, 2018 Feb 20, 2018
Calcium 1016 Inorganic Chemical 1 of 1 result Dec 2, 2008 Dec 2, 2008
Chloride 1017 Inorganic Chemical 1 of 1 result Dec 2, 2008 Dec 2, 2008
Manganese 1032 Inorganic Chemical 1 of 1 result Dec 2, 2008 Dec 2, 2008
Potassium 1042 Inorganic Chemical 1 of 1 result Dec 2, 2008 Dec 2, 2008
Residue, Total, Filterable 1057 Water Quality 1 of 1 result Dec 2, 2008 Dec 2, 2008
Alkalinity, Caco3 Stability 1067 Water Quality 1 of 1 result Dec 2, 2008 Dec 2, 2008
Carbon Dioxide 1901 Water Quality 1 of 1 result Dec 2, 2008 Dec 2, 2008
Color 1905 Water Quality 1 of 1 result Dec 2, 2008 Dec 2, 2008
Hardness, Total (As Caco3) 1915 Water Quality 1 of 1 result Dec 2, 2008 Dec 2, 2008
PH 1925 Water Quality 1 of 1 result Dec 2, 2008 Dec 2, 2008
Alkalinity, Total 1927 Water Quality 1 of 1 result Dec 2, 2008 Dec 2, 2008
Calculated Sodium NACA Water Quality 1 of 1 result Dec 2, 2008 Dec 2, 2008
PH, Field Result PHFD Water Quality 1 of 1 result Dec 2, 2008 Dec 2, 2008
Temperature, Field Result TEMP Water Quality 1 of 1 result Dec 2, 2008 Dec 2, 2008
Cadmium 1015 Inorganic Chemical 1 of 10 results Mar 16, 2005 Mar 16, 2005

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 5 samples collected between September 25, 2024 and September 25, 2026 are listed below, newest first.

17 results from the 5 samples listed here: 4 detected, 13 not detected. 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 1 sampling point 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 Rouses, every result from the 5 samples on record, 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
Aug 25, 2025 08:30
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
CN-250826-040
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Aug 25, 2025 08:30, sampling point TF102 Cyanide 1024 EPA method QC10204001X Jan 1, 2023 – Dec 31, 2025
Collected
Feb 24, 2025 07:00
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
IN-250225-063
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 07:00, sampling point TF102 Arsenic 1005 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.0036 mg/l , sample collected Feb 24, 2025 07:00, sampling point TF102 Barium 1010 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 07:00, sampling point TF102 Cadmium 1015 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 07:00, sampling point TF102 Chromium 1020 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.5 mg/l , sample collected Feb 24, 2025 07:00, sampling point TF102 Fluoride 1025 EPA method QC 10-109-12-2-A Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 07:00, sampling point TF102 Mercury 1035 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 07:00, sampling point TF102 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 07:00, sampling point TF102 Selenium 1045 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 07:00, sampling point TF102 Antimony, Total 1074 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 07:00, sampling point TF102 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 07:00, sampling point TF102 Thallium, Total 1085 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Feb 24, 2025 06:30
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
NI-250225-001
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 06:30, sampling point TF102 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 06:30, sampling point TF102 Nitrate 1040 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 06:30, sampling point TF102 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Collected
Feb 12, 2025 12:45
Sampling point
SMD Location withheld
Sample type
Routine
Lab sample
HA-250213-006
Laboratory
MSDH Lab
15.6 ug/l , sample collected Feb 12, 2025 12:45, sampling point SMD Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2023 – Dec 31, 2025
Collected
Feb 12, 2025 12:30
Sampling point
SMD Location withheld
Sample type
Routine
Lab sample
TH-250213-006
Laboratory
MSDH Lab
2.89 ug/l , sample collected Feb 12, 2025 12:30, sampling point SMD TTHM 2950 EPA method 524.2 Jan 1, 2023 – Dec 31, 2025

Routine (5).