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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 221–230 of 426 samples, newest first — collected June 27, 2011 to January 27, 2012. The summary above covers all 426.

82 results from the 10 samples listed here: 8 detected, 74 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 221 to 230 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
Jan 27, 2012 02:40
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
120130-001VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 27, 2012 02:40, sampling point TF103 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 27, 2012 02:40, sampling point TF103 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
0.854 ug/l , sample collected Jan 27, 2012 02:40, sampling point TF103 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 27, 2012 02:40, sampling point TF103 Dichloromethane 2964 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 27, 2012 02:40, sampling point TF103 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 27, 2012 02:40, sampling point TF103 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 27, 2012 02:40, sampling point TF103 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 27, 2012 02:40, sampling point TF103 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 27, 2012 02:40, sampling point TF103 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 27, 2012 02:40, sampling point TF103 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 27, 2012 02:40, sampling point TF103 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 27, 2012 02:40, sampling point TF103 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 27, 2012 02:40, sampling point TF103 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 27, 2012 02:40, sampling point TF103 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 27, 2012 02:40, sampling point TF103 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 27, 2012 02:40, sampling point TF103 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 27, 2012 02:40, sampling point TF103 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 27, 2012 02:40, sampling point TF103 Benzene 2990 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 27, 2012 02:40, sampling point TF103 Toluene 2991 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 27, 2012 02:40, sampling point TF103 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 27, 2012 02:40, sampling point TF103 Styrene 2996 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Collected
Oct 25, 2011 03:15
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
111026-015VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2011 03:15, sampling point TF103 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Oct 1, 2011 – Dec 31, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2011 03:15, sampling point TF103 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Oct 1, 2011 – Dec 31, 2011
0.64 ug/l , sample collected Oct 25, 2011 03:15, sampling point TF103 Xylenes, Total 2955 EPA method 524.2 Oct 1, 2011 – Dec 31, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2011 03:15, sampling point TF103 Dichloromethane 2964 EPA method 524.2 Oct 1, 2011 – Dec 31, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2011 03:15, sampling point TF103 O-Dichlorobenzene 2968 EPA method 524.2 Oct 1, 2011 – Dec 31, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2011 03:15, sampling point TF103 P-Dichlorobenzene 2969 EPA method 524.2 Oct 1, 2011 – Dec 31, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2011 03:15, sampling point TF103 Vinyl Chloride 2976 EPA method 524.2 Oct 1, 2011 – Dec 31, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2011 03:15, sampling point TF103 1,1-Dichloroethylene 2977 EPA method 524.2 Oct 1, 2011 – Dec 31, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2011 03:15, sampling point TF103 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Oct 1, 2011 – Dec 31, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2011 03:15, sampling point TF103 1,2-Dichloroethane 2980 EPA method 524.2 Oct 1, 2011 – Dec 31, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2011 03:15, sampling point TF103 1,1,1-Trichloroethane 2981 EPA method 524.2 Oct 1, 2011 – Dec 31, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2011 03:15, sampling point TF103 Carbon Tetrachloride 2982 EPA method 524.2 Oct 1, 2011 – Dec 31, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2011 03:15, sampling point TF103 1,2-Dichloropropane 2983 EPA method 524.2 Oct 1, 2011 – Dec 31, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2011 03:15, sampling point TF103 Trichloroethylene 2984 EPA method 524.2 Oct 1, 2011 – Dec 31, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2011 03:15, sampling point TF103 1,1,2-Trichloroethane 2985 EPA method 524.2 Oct 1, 2011 – Dec 31, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2011 03:15, sampling point TF103 Tetrachloroethylene 2987 EPA method 524.2 Oct 1, 2011 – Dec 31, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2011 03:15, sampling point TF103 Chlorobenzene 2989 EPA method 524.2 Oct 1, 2011 – Dec 31, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2011 03:15, sampling point TF103 Benzene 2990 EPA method 524.2 Oct 1, 2011 – Dec 31, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2011 03:15, sampling point TF103 Toluene 2991 EPA method 524.2 Oct 1, 2011 – Dec 31, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2011 03:15, sampling point TF103 Ethylbenzene 2992 EPA method 524.2 Oct 1, 2011 – Dec 31, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2011 03:15, sampling point TF103 Styrene 2996 EPA method 524.2 Oct 1, 2011 – Dec 31, 2011
Collected
Aug 16, 2011 03:20
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
110817-016VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 16, 2011 03:20, sampling point TF103 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jul 1, 2011 – Sep 30, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 16, 2011 03:20, sampling point TF103 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jul 1, 2011 – Sep 30, 2011
0.965 ug/l , sample collected Aug 16, 2011 03:20, sampling point TF103 Xylenes, Total 2955 EPA method 524.2 Jul 1, 2011 – Sep 30, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 16, 2011 03:20, sampling point TF103 Dichloromethane 2964 EPA method 524.2 Jul 1, 2011 – Sep 30, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 16, 2011 03:20, sampling point TF103 O-Dichlorobenzene 2968 EPA method 524.2 Jul 1, 2011 – Sep 30, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 16, 2011 03:20, sampling point TF103 P-Dichlorobenzene 2969 EPA method 524.2 Jul 1, 2011 – Sep 30, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 16, 2011 03:20, sampling point TF103 Vinyl Chloride 2976 EPA method 524.2 Jul 1, 2011 – Sep 30, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 16, 2011 03:20, sampling point TF103 1,1-Dichloroethylene 2977 EPA method 524.2 Jul 1, 2011 – Sep 30, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 16, 2011 03:20, sampling point TF103 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jul 1, 2011 – Sep 30, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 16, 2011 03:20, sampling point TF103 1,2-Dichloroethane 2980 EPA method 524.2 Jul 1, 2011 – Sep 30, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 16, 2011 03:20, sampling point TF103 1,1,1-Trichloroethane 2981 EPA method 524.2 Jul 1, 2011 – Sep 30, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 16, 2011 03:20, sampling point TF103 Carbon Tetrachloride 2982 EPA method 524.2 Jul 1, 2011 – Sep 30, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 16, 2011 03:20, sampling point TF103 1,2-Dichloropropane 2983 EPA method 524.2 Jul 1, 2011 – Sep 30, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 16, 2011 03:20, sampling point TF103 Trichloroethylene 2984 EPA method 524.2 Jul 1, 2011 – Sep 30, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 16, 2011 03:20, sampling point TF103 1,1,2-Trichloroethane 2985 EPA method 524.2 Jul 1, 2011 – Sep 30, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 16, 2011 03:20, sampling point TF103 Tetrachloroethylene 2987 EPA method 524.2 Jul 1, 2011 – Sep 30, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 16, 2011 03:20, sampling point TF103 Chlorobenzene 2989 EPA method 524.2 Jul 1, 2011 – Sep 30, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 16, 2011 03:20, sampling point TF103 Benzene 2990 EPA method 524.2 Jul 1, 2011 – Sep 30, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 16, 2011 03:20, sampling point TF103 Toluene 2991 EPA method 524.2 Jul 1, 2011 – Sep 30, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 16, 2011 03:20, sampling point TF103 Ethylbenzene 2992 EPA method 524.2 Jul 1, 2011 – Sep 30, 2011
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 16, 2011 03:20, sampling point TF103 Styrene 2996 EPA method 524.2 Jul 1, 2011 – Sep 30, 2011
Collected
Jul 14, 2011 02:10
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
110715-004TH
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 14, 2011 02:10, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 14, 2011 02:10, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 14, 2011 02:10, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 14, 2011 02:10, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
Not detected below 4 ug/l Minimum Reporting Level , sample collected Jul 14, 2011 02:10, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2011 – Dec 31, 2013
Collected
Jul 14, 2011 02:10
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
110715-002HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Jul 14, 2011 02:10, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 14, 2011 02:10, sampling point MRT000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 14, 2011 02:10, sampling point MRT000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 14, 2011 02:10, sampling point MRT000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 14, 2011 02:10, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 0.006 mg/l Minimum Reporting Level , sample collected Jul 14, 2011 02:10, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 Jan 1, 2011 – Dec 31, 2013
Collected
Jun 27, 2011 04:25
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
110628-011CN
Laboratory
MSDH Lab
Not detected below 15 ug/l Minimum Reporting Level , sample collected Jun 27, 2011 04:25, sampling point TF103 Cyanide 1024 EPA method QC10204001X Jan 1, 2011 – Dec 31, 2013
Collected
Jun 27, 2011 04:00
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
110628-001CN
Laboratory
MSDH Lab
Not detected below 15 ug/l Minimum Reporting Level , sample collected Jun 27, 2011 04:00, sampling point TF102 Cyanide 1024 EPA method QC10204001X Jan 1, 2011 – Dec 31, 2013
Collected
Jun 27, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110628-045PB
Laboratory
MSDH Lab
0.0212 mg/l , sample collected Jun 27, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
0.0007 mg/l , sample collected Jun 27, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Jun 27, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110628-044PB
Laboratory
MSDH Lab
0.0293 mg/l , sample collected Jun 27, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
0.0005 mg/l , sample collected Jun 27, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Jun 27, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110628-043PB
Laboratory
MSDH Lab
0.0478 mg/l , sample collected Jun 27, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 27, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011

Routine (10).