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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

MS0490009 , Stewart Water Association

24 of the 57 analytes this system has been tested for have been detected at least once, across 128 samples on record.

The other 33 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 128 samples on record, detections range from October 8, 2003 to February 25, 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 Stewart Water Association, 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 36 of 36 results Sep 22, 2004 Sep 20, 2023
Lead 1030 Inorganic Chemical 23 of 36 results Sep 22, 2004 Jul 21, 2020
Barium 1010 Inorganic Chemical 10 of 10 results Oct 8, 2003 Jan 10, 2024
Fluoride 1025 Inorganic Chemical 8 of 10 results Oct 8, 2003 Jan 10, 2024
Chromium 1020 Inorganic Chemical 7 of 10 results Oct 8, 2003 Jan 10, 2024
Gross Alpha, Incl. Radon & U 4002 Radionuclide 7 of 7 results Dec 12, 2011 Sep 10, 2019
TTHM 2950 Organic Chemical 6 of 7 results Aug 27, 2007 Feb 25, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 5 of 7 results Jun 16, 2010 Feb 25, 2025
Dichloroacetic Acid 2451 Organic Chemical 4 of 4 results Aug 27, 2007 Jul 5, 2016
Sodium 1052 Inorganic Chemical 3 of 3 results Sep 24, 2019 Feb 25, 2025
Chloroform 2941 Organic Chemical 3 of 4 results Aug 27, 2007 Jul 5, 2016
Bromodichloromethane 2943 Organic Chemical 3 of 4 results Aug 27, 2007 Jul 5, 2016
Combined Radium (-226 & -228) 4010 Radionuclide 2 of 7 results Jun 25, 2018 Sep 10, 2019
Radium-226 4020 Radionuclide 2 of 7 results Jun 25, 2018 Sep 10, 2019
Dibromoacetic Acid 2454 Organic Chemical 2 of 4 results Aug 12, 2013 Jul 5, 2016
Dibromochloromethane 2944 Organic Chemical 2 of 4 results Aug 12, 2013 Jul 5, 2016
Xylenes, Total 2955 Organic Chemical 2 of 19 results Aug 9, 2010 Aug 22, 2011
Arsenic 1005 Inorganic Chemical 1 of 10 results Apr 28, 2020 Apr 28, 2020
Radium-228 4030 Radionuclide 1 of 7 results Sep 10, 2019 Sep 10, 2019
Trichloroacetic Acid 2452 Organic Chemical 1 of 4 results Jul 5, 2016 Jul 5, 2016
Nickel 1036 Inorganic Chemical 1 of 10 results Mar 31, 2014 Mar 31, 2014
Bromoform 2942 Organic Chemical 1 of 4 results Aug 12, 2013 Aug 12, 2013
Cyanide 1024 Inorganic Chemical 1 of 9 results May 2, 2011 May 2, 2011
Selenium 1045 Inorganic Chemical 1 of 10 results Mar 9, 2004 Mar 9, 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 51–60 of 128 samples, newest first — collected March 6, 2013 to August 5, 2014. The summary above covers all 128.

74 results from the 10 samples listed here: 16 detected, 58 not detected. Across the whole record it is 132 of 750. 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 Stewart Water Association, every result from 51 to 60 of 128 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
Aug 5, 2014 08:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
140807-141PB
Laboratory
MSDH Lab
0.0899 mg/l , sample collected Aug 5, 2014 08:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
0.0005 mg/l , sample collected Aug 5, 2014 08:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Collected
Aug 5, 2014
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
140807-140PB
Laboratory
MSDH Lab
0.0777 mg/l , sample collected Aug 5, 2014, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 5, 2014, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Collected
Aug 5, 2014
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
140807-139PB
Laboratory
MSDH Lab
0.2346 mg/l , sample collected Aug 5, 2014, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
0.0006 mg/l , sample collected Aug 5, 2014, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Collected
Jun 24, 2014 02:25
Sampling point
TF103
Sample type
Routine
Lab sample
140625-012VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 24, 2014 02:25, sampling point TF103 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 24, 2014 02:25, sampling point TF103 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 24, 2014 02:25, sampling point TF103 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 24, 2014 02:25, sampling point TF103 Dichloromethane 2964 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 24, 2014 02:25, sampling point TF103 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 24, 2014 02:25, sampling point TF103 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 24, 2014 02:25, sampling point TF103 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 24, 2014 02:25, sampling point TF103 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 24, 2014 02:25, sampling point TF103 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 24, 2014 02:25, sampling point TF103 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 24, 2014 02:25, sampling point TF103 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 24, 2014 02:25, sampling point TF103 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 24, 2014 02:25, sampling point TF103 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 24, 2014 02:25, sampling point TF103 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 24, 2014 02:25, sampling point TF103 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 24, 2014 02:25, sampling point TF103 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 24, 2014 02:25, sampling point TF103 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 24, 2014 02:25, sampling point TF103 Benzene 2990 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 24, 2014 02:25, sampling point TF103 Toluene 2991 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 24, 2014 02:25, sampling point TF103 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 24, 2014 02:25, sampling point TF103 Styrene 2996 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Collected
Mar 31, 2014 02:30
Sampling point
TF103
Sample type
Routine
Lab sample
140401-060IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 31, 2014 02:30, sampling point TF103 Arsenic 1005 EPA method 200.8 Jan 1, 2013 – Dec 31, 2015
0.0034 mg/l , sample collected Mar 31, 2014 02:30, sampling point TF103 Barium 1010 EPA method 200.8 Jan 1, 2013 – Dec 31, 2015
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 31, 2014 02:30, sampling point TF103 Cadmium 1015 EPA method 200.8 Jan 1, 2013 – Dec 31, 2015
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 31, 2014 02:30, sampling point TF103 Chromium 1020 EPA method 200.8 Jan 1, 2013 – Dec 31, 2015
0.143 mg/l , sample collected Mar 31, 2014 02:30, sampling point TF103 Fluoride 1025 EPA method 300.0 Jan 1, 2013 – Dec 31, 2015
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 31, 2014 02:30, sampling point TF103 Mercury 1035 EPA method 200.8 Jan 1, 2013 – Dec 31, 2015
0.0014 mg/l , sample collected Mar 31, 2014 02:30, sampling point TF103 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Mar 31, 2014 02:30, sampling point TF103 Selenium 1045 EPA method 200.8 Jan 1, 2013 – Dec 31, 2015
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 31, 2014 02:30, sampling point TF103 Antimony, Total 1074 EPA method 200.8 Jan 1, 2013 – Dec 31, 2015
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 31, 2014 02:30, sampling point TF103 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2013 – Dec 31, 2015
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 31, 2014 02:30, sampling point TF103 Thallium, Total 1085 EPA method 200.8 Jan 1, 2013 – Dec 31, 2015
Collected
Mar 17, 2014 02:10
Sampling point
TF103
Sample type
Routine
Lab sample
140318-039CN
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Mar 17, 2014 02:10, sampling point TF103 Cyanide 1024 EPA method QC10204001X Jan 1, 2013 – Dec 31, 2015
Collected
Aug 12, 2013
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
130813-011TH
Laboratory
MSDH Lab
2.87 ug/l , sample collected Aug 12, 2013, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
2.29 ug/l , sample collected Aug 12, 2013, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
3.23 ug/l , sample collected Aug 12, 2013, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
4.72 ug/l , sample collected Aug 12, 2013, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
13.11 ug/l , sample collected Aug 12, 2013, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2011 – Dec 31, 2013
Collected
Aug 12, 2013
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
130813-016HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Aug 12, 2013, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.001 mg/l , sample collected Aug 12, 2013, sampling point MRT000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Aug 12, 2013, sampling point MRT000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Aug 12, 2013, sampling point MRT000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
0.002 mg/l , sample collected Aug 12, 2013, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.003 mg/l , sample collected Aug 12, 2013, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 Jan 1, 2011 – Dec 31, 2013
Collected
Jun 3, 2013 15:00
Sampling point
TF103
Sample type
Routine
Lab sample
130604-002VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 15:00, sampling point TF103 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 15:00, sampling point TF103 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 15:00, sampling point TF103 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 15:00, sampling point TF103 Dichloromethane 2964 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 15:00, sampling point TF103 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 15:00, sampling point TF103 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 15:00, sampling point TF103 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 15:00, sampling point TF103 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 15:00, sampling point TF103 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 15:00, sampling point TF103 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 15:00, sampling point TF103 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 15:00, sampling point TF103 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 15:00, sampling point TF103 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 15:00, sampling point TF103 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 15:00, sampling point TF103 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 15:00, sampling point TF103 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 15:00, sampling point TF103 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 15:00, sampling point TF103 Benzene 2990 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 15:00, sampling point TF103 Toluene 2991 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 15:00, sampling point TF103 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 15:00, sampling point TF103 Styrene 2996 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Collected
Mar 6, 2013 01:00
Sampling point
TF103
Sample type
Routine
Lab sample
130307-027NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 6, 2013 01:00, sampling point TF103 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 6, 2013 01:00, sampling point TF103 Nitrate 1040 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 6, 2013 01:00, sampling point TF103 Nitrite 1041 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013

Routine (10).