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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; 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 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

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.

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The most recent samples, result by result

The table below lists 1–10 of 11 samples, newest first — collected March 3, 2025 to July 22, 2026. The summary above covers all 11.

48 results from the 10 samples listed here: 9 detected, 39 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.

Chemical and radiological sample results for Houlka-Washington Ext, every result from 1 to 10 of 11 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 22, 2026
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
35053181002
Laboratory
Pace Analytical Services, LLC
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Jul 22, 2026, sampling point TF102 Nitrate-Nitrite 1038 Not recorded
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Jul 22, 2026, sampling point TF102 Nitrate 1040 EPA method 353.2 Not recorded
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Jul 22, 2026, sampling point TF102 Nitrite 1041 EPA method 353.2 Not recorded
Collected
Jul 22, 2026
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
35053181001
Laboratory
Pace Analytical Services, LLC
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Jul 22, 2026, sampling point TF101 Nitrate-Nitrite 1038 Not recorded
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Jul 22, 2026, sampling point TF101 Nitrate 1040 EPA method 353.2 Not recorded
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Jul 22, 2026, sampling point TF101 Nitrite 1041 EPA method 353.2 Not recorded
Collected
Oct 22, 2025 14:30
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
CN-251023-012
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Oct 22, 2025 14:30, sampling point TF102 Cyanide 1024 EPA method QC10204001X Jan 1, 2023 – Dec 31, 2025
Collected
Oct 22, 2025 14:10
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
CN-251023-011
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Oct 22, 2025 14:10, sampling point TF101 Cyanide 1024 EPA method QC10204001X Jan 1, 2023 – Dec 31, 2025
Collected
Oct 20, 2025 13:30
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
810-168743-1
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Oct 20, 2025 13:30, sampling point DS000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Oct 20, 2025 13:30, sampling point DS000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Oct 20, 2025 13:30, sampling point DS000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Oct 20, 2025 13:30, sampling point DS000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Oct 20, 2025 13:30, sampling point DS000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 2 ug/l Minimum Reporting Level , sample collected Oct 20, 2025 13:30, sampling point DS000 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 20, 2025 13:30, sampling point DS000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 20, 2025 13:30, sampling point DS000 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 20, 2025 13:30, sampling point DS000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 20, 2025 13:30, sampling point DS000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 20, 2025 13:30, sampling point DS000 TTHM 2950 EPA method 524.2 Not recorded
Collected
Apr 2, 2025 13:15
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
NI-250403-003
Laboratory
MSDH Lab
0.201 mg/l , sample collected Apr 2, 2025 13:15, 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 Apr 2, 2025 13:15, sampling point TF102 Nitrate 1040 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
0.124 mg/l , sample collected Apr 2, 2025 13:15, sampling point TF102 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Collected
Apr 2, 2025 13:00
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
NI-250403-002
Laboratory
MSDH Lab
0.445 mg/l , sample collected Apr 2, 2025 13:00, sampling point TF101 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Apr 2, 2025 13:00, sampling point TF101 Nitrate 1040 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
0.416 mg/l , sample collected Apr 2, 2025 13:00, sampling point TF101 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Collected
Mar 19, 2025 14:20
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
IN-250320-013
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 19, 2025 14:20, sampling point TF102 Arsenic 1005 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.0167 mg/l , sample collected Mar 19, 2025 14:20, 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 Mar 19, 2025 14:20, 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 Mar 19, 2025 14:20, sampling point TF102 Chromium 1020 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.94 mg/l , sample collected Mar 19, 2025 14:20, 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 Mar 19, 2025 14:20, 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 Mar 19, 2025 14:20, sampling point TF102 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Mar 19, 2025 14:20, 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 Mar 19, 2025 14:20, 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 Mar 19, 2025 14:20, 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 Mar 19, 2025 14:20, sampling point TF102 Thallium, Total 1085 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Mar 15, 2025 14:30
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
IN-250320-012
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 15, 2025 14:30, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.0196 mg/l , sample collected Mar 15, 2025 14:30, sampling point TF101 Barium 1010 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 15, 2025 14:30, sampling point TF101 Cadmium 1015 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 15, 2025 14:30, sampling point TF101 Chromium 1020 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.782 mg/l , sample collected Mar 15, 2025 14:30, sampling point TF101 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 Mar 15, 2025 14:30, sampling point TF101 Mercury 1035 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 15, 2025 14:30, sampling point TF101 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Mar 15, 2025 14:30, sampling point TF101 Selenium 1045 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 15, 2025 14:30, sampling point TF101 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 Mar 15, 2025 14:30, sampling point TF101 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 Mar 15, 2025 14:30, sampling point TF101 Thallium, Total 1085 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Mar 3, 2025 13:15
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
NA-250304-025
Laboratory
MSDH Lab
150 mg/l , sample collected Mar 3, 2025 13:15, sampling point TF102 Sodium 1052 EPA method 200.7 Jan 1, 2023 – Dec 31, 2025

Routine (10).