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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 131–140 of 426 samples, newest first — collected May 8, 2017 to September 18, 2017. The summary above covers all 426.

66 results from the 10 samples listed here: 12 detected, 54 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 131 to 140 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
Sep 18, 2017 05:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
170921-029PB
Laboratory
MSDH Lab
0.2413 mg/l , sample collected Sep 18, 2017 05:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 18, 2017 05:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Collected
Sep 18, 2017 08:30
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
170921-028PB
Laboratory
MSDH Lab
0.0494 mg/l , sample collected Sep 18, 2017 08:30, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 18, 2017 08:30, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Collected
Sep 18, 2017 05:11
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
170921-027PB
Laboratory
MSDH Lab
0.0262 mg/l , sample collected Sep 18, 2017 05:11, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
0.002 mg/l , sample collected Sep 18, 2017 05:11, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Collected
Sep 18, 2017 04:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
170921-026PB
Laboratory
MSDH Lab
0.3419 mg/l , sample collected Sep 18, 2017 04:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
0.0013 mg/l , sample collected Sep 18, 2017 04:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Collected
Sep 18, 2017 07:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
170921-022PB
Laboratory
MSDH Lab
0.0195 mg/l , sample collected Sep 18, 2017 07:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 18, 2017 07:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Collected
Sep 18, 2017
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
170921-021PB
Laboratory
MSDH Lab
0.2131 mg/l , sample collected Sep 18, 2017, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 18, 2017, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Collected
Sep 18, 2017 12:45
Sampling point
TF104 Treatment Facility TF104
Sample type
Routine
Lab sample
170919-014CN
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Sep 18, 2017 12:45, sampling point TF104 Cyanide 1024 EPA method QC10204001X Jan 1, 2015 – Dec 31, 2017
Collected
Jun 21, 2017 01:00
Sampling point
TF104 Treatment Facility TF104
Sample type
Routine
Lab sample
170622-008VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:00, sampling point TF104 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:00, sampling point TF104 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:00, sampling point TF104 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:00, sampling point TF104 Dichloromethane 2964 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:00, sampling point TF104 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:00, sampling point TF104 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:00, sampling point TF104 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:00, sampling point TF104 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:00, sampling point TF104 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:00, sampling point TF104 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:00, sampling point TF104 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:00, sampling point TF104 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:00, sampling point TF104 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:00, sampling point TF104 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:00, sampling point TF104 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:00, sampling point TF104 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:00, sampling point TF104 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:00, sampling point TF104 Benzene 2990 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:00, sampling point TF104 Toluene 2991 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:00, sampling point TF104 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:00, sampling point TF104 Styrene 2996 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Collected
Jun 21, 2017 01:35
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
170622-007VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:35, sampling point TF103 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:35, sampling point TF103 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:35, sampling point TF103 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:35, sampling point TF103 Dichloromethane 2964 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:35, sampling point TF103 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:35, sampling point TF103 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:35, sampling point TF103 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:35, sampling point TF103 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:35, sampling point TF103 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:35, sampling point TF103 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:35, sampling point TF103 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:35, sampling point TF103 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:35, sampling point TF103 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:35, sampling point TF103 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:35, sampling point TF103 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:35, sampling point TF103 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:35, sampling point TF103 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:35, sampling point TF103 Benzene 2990 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:35, sampling point TF103 Toluene 2991 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:35, sampling point TF103 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 21, 2017 01:35, sampling point TF103 Styrene 2996 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Collected
May 8, 2017 03:30
Sampling point
TF104 Treatment Facility TF104
Sample type
Routine
Lab sample
170509-025IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 8, 2017 03:30, sampling point TF104 Arsenic 1005 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
0.0315 mg/l , sample collected May 8, 2017 03:30, sampling point TF104 Barium 1010 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 8, 2017 03:30, sampling point TF104 Cadmium 1015 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
0.0015 mg/l , sample collected May 8, 2017 03:30, sampling point TF104 Chromium 1020 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
0.187 mg/l , sample collected May 8, 2017 03:30, sampling point TF104 Fluoride 1025 EPA method 300.0 Jan 1, 2015 – Dec 31, 2017
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 8, 2017 03:30, sampling point TF104 Mercury 1035 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 8, 2017 03:30, sampling point TF104 Nickel 1036 EPA method 200.8 Not recorded
0.0018 mg/l , sample collected May 8, 2017 03:30, sampling point TF104 Selenium 1045 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 8, 2017 03:30, sampling point TF104 Antimony, Total 1074 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 8, 2017 03:30, sampling point TF104 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 8, 2017 03:30, sampling point TF104 Thallium, Total 1085 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017

Routine (10).