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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

MS0580023 , Houlka-Washington Ext

21 of the 57 analytes this system has been tested for have been detected at least once, across 214 samples on record.

The other 36 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 214 samples on record, detections range from October 15, 2003 to April 2, 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 Houlka-Washington Ext, 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 Aug 7, 2007 Sep 15, 2023
Barium 1010 Inorganic Chemical 20 of 20 results Oct 15, 2003 Mar 19, 2025
Fluoride 1025 Inorganic Chemical 20 of 20 results Oct 15, 2003 Mar 19, 2025
Lead 1030 Inorganic Chemical 19 of 60 results Aug 7, 2007 Sep 15, 2023
Chromium 1020 Inorganic Chemical 12 of 20 results Oct 15, 2003 May 8, 2013
Gross Alpha, Incl. Radon & U 4002 Radionuclide 10 of 10 results Dec 12, 2011 Jul 17, 2012
Sodium 1052 Inorganic Chemical 6 of 6 results Sep 22, 2019 Mar 3, 2025
Selenium 1045 Inorganic Chemical 6 of 20 results Mar 15, 2004 Mar 29, 2006
Nickel 1036 Inorganic Chemical 5 of 20 results Mar 15, 2004 Nov 4, 2019
Nitrate-Nitrite 1038 Inorganic Chemical 4 of 46 results May 4, 2015 Apr 2, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 4 of 11 results Sep 4, 2007 Dec 7, 2016
Sulfate 1055 Inorganic Chemical 4 of 4 results Oct 15, 2003 Mar 15, 2004
Nitrite 1041 Inorganic Chemical 3 of 46 results Mar 9, 2022 Apr 2, 2025
Arsenic 1005 Inorganic Chemical 3 of 20 results Mar 15, 2004 Oct 11, 2022
Cyanide 1024 Inorganic Chemical 3 of 22 results Feb 22, 2010 Feb 23, 2016
Nitrate 1040 Inorganic Chemical 2 of 46 results May 4, 2015 Dec 11, 2019
Monochloroacetic Acid 2450 Organic Chemical 2 of 5 results Dec 7, 2016 Dec 7, 2016
TTHM 2950 Organic Chemical 2 of 13 results Sep 4, 2007 Jun 28, 2010
Cadmium 1015 Inorganic Chemical 2 of 20 results Apr 11, 2005 Apr 11, 2005
Uranium-238 4009 Radionuclide 1 of 2 results Mar 29, 2006 Mar 29, 2006
Antimony, Total 1074 Inorganic Chemical 1 of 20 results Mar 15, 2004 Mar 15, 2004

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 11–20 of 214 samples, newest first — collected September 15, 2023 to March 3, 2025. The summary above covers all 214.

19 results from the 10 samples listed here: 6 detected, 13 not detected. Across the whole record it is 189 of 1,040. 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 5 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 Houlka-Washington Ext, every result from 11 to 20 of 214 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
Mar 3, 2025 12:50
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
NA-250304-024
Laboratory
MSDH Lab
157 mg/l , sample collected Mar 3, 2025 12:50, sampling point TF101 Sodium 1052 EPA method 200.7 Jan 1, 2023 – Dec 31, 2025
Collected
Jun 24, 2024 13:15
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
HA-240625-011
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 24, 2024 13:15, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Not recorded
Collected
Jun 24, 2024 13:15
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
TH-240625-011
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 24, 2024 13:15, sampling point MRT000 TTHM 2950 EPA method 524.2 Not recorded
Collected
Apr 8, 2024 13:10
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
NI-240409-002
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 8, 2024 13:10, sampling point TF102 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Apr 8, 2024 13:10, sampling point TF102 Nitrate 1040 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 8, 2024 13:10, sampling point TF102 Nitrite 1041 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Collected
Apr 8, 2024 12:55
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
NI-240409-001
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 8, 2024 12:55, sampling point TF101 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Apr 8, 2024 12:55, sampling point TF101 Nitrate 1040 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 8, 2024 12:55, sampling point TF101 Nitrite 1041 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Collected
Sep 15, 2023 07:00
Sampling point
LC0001 Location withheld
Sample type
Routine
Lab sample
PB-230919-029
Laboratory
MSDH Lab
0.0201 mg/l , sample collected Sep 15, 2023 07:00, sampling point LC0001 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 15, 2023 07:00, sampling point LC0001 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Sep 15, 2023 10:19
Sampling point
LC0013 Location withheld
Sample type
Routine
Lab sample
PB-230919-023
Laboratory
MSDH Lab
0.04 mg/l , sample collected Sep 15, 2023 10:19, sampling point LC0013 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 15, 2023 10:19, sampling point LC0013 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Sep 15, 2023 07:00
Sampling point
LC0019 Location withheld
Sample type
Routine
Lab sample
PB-230919-021
Laboratory
MSDH Lab
0.1 mg/l , sample collected Sep 15, 2023 07:00, sampling point LC0019 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 15, 2023 07:00, sampling point LC0019 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Sep 15, 2023 08:43
Sampling point
LC0003 Location withheld
Sample type
Routine
Lab sample
PB-230919-022
Laboratory
MSDH Lab
0.0403 mg/l , sample collected Sep 15, 2023 08:43, sampling point LC0003 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 15, 2023 08:43, sampling point LC0003 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Sep 15, 2023 04:30
Sampling point
LC0002 Location withheld
Sample type
Routine
Lab sample
PB-230919-024
Laboratory
MSDH Lab
0.0641 mg/l , sample collected Sep 15, 2023 04:30, sampling point LC0002 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 15, 2023 04:30, sampling point LC0002 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023

Routine (10).