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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

MS0090004 , Houlka-Houston W/A

28 of the 59 analytes this system has been tested for have been detected at least once, across 426 samples on record.

The other 31 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 426 samples on record, detections range from November 30, 1993 to December 8, 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-Houston W/A, 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 124 of 139 results Nov 30, 1993 Jun 21, 2023
Lead 1030 Inorganic Chemical 87 of 139 results Nov 30, 1993 Jun 21, 2023
Barium 1010 Inorganic Chemical 30 of 30 results Sep 24, 2003 Jan 13, 2025
Fluoride 1025 Inorganic Chemical 30 of 30 results Sep 24, 2003 Jan 13, 2025
TTHM 2950 Organic Chemical 17 of 26 results May 17, 2004 Dec 8, 2025
Chromium 1020 Inorganic Chemical 16 of 30 results Sep 24, 2003 Jan 13, 2025
Xylenes, Total 2955 Organic Chemical 16 of 83 results May 30, 2006 May 21, 2018
Arsenic 1005 Inorganic Chemical 14 of 30 results Jan 18, 2006 Jan 13, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 14 of 28 results Aug 13, 2008 Oct 21, 2024
Selenium 1045 Inorganic Chemical 10 of 30 results Dec 13, 2005 Apr 13, 2020
Gross Alpha, Incl. Radon & U 4002 Radionuclide 10 of 10 results Mar 8, 2012 Oct 24, 2012
Sodium 1052 Inorganic Chemical 6 of 6 results Feb 1, 2021 Oct 22, 2024
Nitrite 1041 Inorganic Chemical 6 of 60 results May 17, 2004 Feb 1, 2021
Ethylbenzene 2992 Organic Chemical 5 of 83 results Jul 13, 2009 Apr 12, 2011
Nitrate-Nitrite 1038 Inorganic Chemical 4 of 60 results May 17, 2004 Feb 1, 2021
Bromoform 2942 Organic Chemical 3 of 7 results Aug 18, 2014 Dec 8, 2025
Bromodichloromethane 2943 Organic Chemical 3 of 7 results Aug 18, 2014 Dec 8, 2025
Dibromochloromethane 2944 Organic Chemical 3 of 7 results Aug 18, 2014 Dec 8, 2025
Nickel 1036 Inorganic Chemical 3 of 30 results Mar 24, 2008 May 3, 2022
Nitrate 1040 Inorganic Chemical 3 of 60 results May 17, 2004 Jun 26, 2006
Dibromoacetic Acid 2454 Organic Chemical 1 of 8 results Sep 22, 2025 Sep 22, 2025
Monochloroacetic Acid 2450 Organic Chemical 1 of 8 results Apr 20, 2020 Apr 20, 2020
Monobromoacetic Acid 2453 Organic Chemical 1 of 8 results Aug 18, 2014 Aug 18, 2014
Gross Alpha, Excl. Radon & U 4000 Radionuclide 1 of 1 result Apr 23, 2012 Apr 23, 2012
Combined Radium (-226 & -228) 4010 Radionuclide 1 of 12 results Apr 23, 2012 Apr 23, 2012
Radium-226 4020 Radionuclide 1 of 12 results Apr 23, 2012 Apr 23, 2012
Gross Alpha Particle Activity 4109 Radionuclide 1 of 2 results Apr 23, 2012 Apr 23, 2012
Sulfate 1055 Inorganic Chemical 1 of 5 results Jan 14, 2004 Jan 14, 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 401–410 of 426 samples, newest first — collected November 30, 1993 to May 16, 1994. The summary above covers all 426.

20 results from the 10 samples listed here: 18 detected, 2 not detected. Across the whole record it is 412 of 2,763. 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-Houston W/A, every result from 401 to 410 of 426 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
May 16, 1994
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
940517-053L
Laboratory
MSDH Lab
0.261 mg/l , sample collected May 16, 1994, sampling point DS000 Copper, Free 1022 Not recorded
0.002 mg/l , sample collected May 16, 1994, sampling point DS000 Lead 1030 Not recorded
Collected
May 16, 1994
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
940517-052L
Laboratory
MSDH Lab
0.101 mg/l , sample collected May 16, 1994, sampling point DS000 Copper, Free 1022 Not recorded
0.002 mg/l , sample collected May 16, 1994, sampling point DS000 Lead 1030 Not recorded
Collected
May 16, 1994
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
940517-051L
Laboratory
MSDH Lab
0.153 mg/l , sample collected May 16, 1994, sampling point DS000 Copper, Free 1022 Not recorded
0.001 mg/l , sample collected May 16, 1994, sampling point DS000 Lead 1030 Not recorded
Collected
May 16, 1994
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
940517-050L
Laboratory
MSDH Lab
0.421 mg/l , sample collected May 16, 1994, sampling point DS000 Copper, Free 1022 Not recorded
0.001 mg/l , sample collected May 16, 1994, sampling point DS000 Lead 1030 Not recorded
Collected
Nov 30, 1993
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
931201-097L
Laboratory
MSDH Lab
0.084 mg/l , sample collected Nov 30, 1993, sampling point DS000 Copper, Free 1022 Not recorded
Not detected below 0.001 mg/l Method Detection Limit , sample collected Nov 30, 1993, sampling point DS000 Lead 1030 Not recorded
Collected
Nov 30, 1993
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
931201-096L
Laboratory
MSDH Lab
0.111 mg/l , sample collected Nov 30, 1993, sampling point DS000 Copper, Free 1022 Not recorded
0.002 mg/l , sample collected Nov 30, 1993, sampling point DS000 Lead 1030 Not recorded
Collected
Nov 30, 1993
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
931201-095L
Laboratory
MSDH Lab
0.174 mg/l , sample collected Nov 30, 1993, sampling point DS000 Copper, Free 1022 Not recorded
0.001 mg/l , sample collected Nov 30, 1993, sampling point DS000 Lead 1030 Not recorded
Collected
Nov 30, 1993
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
931201-094L
Laboratory
MSDH Lab
0.09 mg/l , sample collected Nov 30, 1993, sampling point DS000 Copper, Free 1022 Not recorded
0.001 mg/l , sample collected Nov 30, 1993, sampling point DS000 Lead 1030 Not recorded
Collected
Nov 30, 1993
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
931201-093L
Laboratory
MSDH Lab
0.303 mg/l , sample collected Nov 30, 1993, sampling point DS000 Copper, Free 1022 Not recorded
Not detected below 0.001 mg/l Method Detection Limit , sample collected Nov 30, 1993, sampling point DS000 Lead 1030 Not recorded
Collected
Nov 30, 1993
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
931201-072L
Laboratory
MSDH Lab
0.637 mg/l , sample collected Nov 30, 1993, sampling point DS000 Copper, Free 1022 Not recorded
0.018 mg/l , sample collected Nov 30, 1993, sampling point DS000 Lead 1030 Not recorded

Routine (10).