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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

MS0480021 , Tronox

15 of the 54 analytes this system has been tested for have been detected at least once, across 140 samples on record.

The other 39 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 140 samples on record, detections range from October 13, 2003 to March 18, 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 Tronox, 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 30 of 32 results Jul 17, 2007 Sep 6, 2023
Barium 1010 Inorganic Chemical 16 of 16 results Oct 13, 2003 Mar 18, 2025
Fluoride 1025 Inorganic Chemical 12 of 16 results Oct 13, 2003 Mar 18, 2025
Chromium 1020 Inorganic Chemical 12 of 16 results Oct 13, 2003 May 7, 2019
TTHM 2950 Organic Chemical 5 of 15 results Aug 27, 2007 Nov 6, 2024
Nickel 1036 Inorganic Chemical 5 of 16 results Mar 10, 2004 May 7, 2019
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 4 of 14 results Jun 16, 2010 Feb 26, 2025
Sulfate 1055 Inorganic Chemical 4 of 4 results Oct 13, 2003 Mar 10, 2004
Dibromochloromethane 2944 Organic Chemical 2 of 12 results Jul 5, 2016 Nov 6, 2024
Chloroform 2941 Organic Chemical 2 of 12 results Aug 14, 2013 Jul 5, 2016
Selenium 1045 Inorganic Chemical 2 of 16 results Apr 6, 2005 Apr 6, 2005
Sodium 1052 Inorganic Chemical 1 of 1 result Mar 1, 2022 Mar 1, 2022
Dichloroacetic Acid 2451 Organic Chemical 1 of 11 results Jul 5, 2016 Jul 5, 2016
Bromodichloromethane 2943 Organic Chemical 1 of 12 results Jul 5, 2016 Jul 5, 2016
Toluene 2991 Organic Chemical 1 of 18 results Nov 17, 2004 Nov 17, 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 31–40 of 140 samples, newest first — collected July 5, 2017 to July 21, 2020. The summary above covers all 140.

49 results from the 10 samples listed here: 7 detected, 42 not detected. Across the whole record it is 98 of 872. 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 Tronox, every result from 31 to 40 of 140 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 21, 2020 15:25
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
200723-066PB
Laboratory
MSDH Lab
0.0046 mg/l , sample collected Jul 21, 2020 15:25, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2018 – Dec 31, 2020
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 21, 2020 15:25, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2018 – Dec 31, 2020
Collected
Jul 21, 2020 15:35
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
200723-063PB
Laboratory
MSDH Lab
0.0053 mg/l , sample collected Jul 21, 2020 15:35, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2018 – Dec 31, 2020
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 21, 2020 15:35, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2018 – Dec 31, 2020
Collected
Jun 2, 2020 14:30
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
200603-010VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 2, 2020 14:30, sampling point TF080 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2016 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 2, 2020 14:30, sampling point TF080 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2016 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 2, 2020 14:30, sampling point TF080 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2016 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 2, 2020 14:30, sampling point TF080 Dichloromethane 2964 EPA method 524.2 Jan 1, 2016 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 2, 2020 14:30, sampling point TF080 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2016 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 2, 2020 14:30, sampling point TF080 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2016 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 2, 2020 14:30, sampling point TF080 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2016 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 2, 2020 14:30, sampling point TF080 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2016 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 2, 2020 14:30, sampling point TF080 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2016 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 2, 2020 14:30, sampling point TF080 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2016 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 2, 2020 14:30, sampling point TF080 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2016 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 2, 2020 14:30, sampling point TF080 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2016 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 2, 2020 14:30, sampling point TF080 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2016 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 2, 2020 14:30, sampling point TF080 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2016 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 2, 2020 14:30, sampling point TF080 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2016 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 2, 2020 14:30, sampling point TF080 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2016 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 2, 2020 14:30, sampling point TF080 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2016 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 2, 2020 14:30, sampling point TF080 Benzene 2990 EPA method 524.2 Jan 1, 2016 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 2, 2020 14:30, sampling point TF080 Toluene 2991 EPA method 524.2 Jan 1, 2016 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 2, 2020 14:30, sampling point TF080 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2016 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 2, 2020 14:30, sampling point TF080 Styrene 2996 EPA method 524.2 Jan 1, 2016 – Dec 31, 2021
Collected
Apr 8, 2020 15:30
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
200409-061NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 8, 2020 15:30, sampling point TF080 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2020 – Dec 31, 2020
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Apr 8, 2020 15:30, sampling point TF080 Nitrate 1040 EPA method QC10107041C Jan 1, 2020 – Dec 31, 2020
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 8, 2020 15:30, sampling point TF080 Nitrite 1041 EPA method QC10107041C Jan 1, 2020 – Dec 31, 2020
Collected
Nov 19, 2019 14:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
191120-007NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Nov 19, 2019 14:00, sampling point TF080 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2019 – Dec 31, 2019
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Nov 19, 2019 14:00, sampling point TF080 Nitrate 1040 EPA method QC10107041C Jan 1, 2019 – Dec 31, 2019
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Nov 19, 2019 14:00, sampling point TF080 Nitrite 1041 EPA method QC10107041C Jan 1, 2019 – Dec 31, 2019
Collected
Sep 11, 2019
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
041923761-0001
Laboratory
Emsl Analytical, Inc.
Not detected below 0.17 mfl Minimum Reporting Level , sample collected Sep 11, 2019, sampling point DS000 Asbestos 1094 EPA method 100.2 Not recorded
Collected
May 7, 2019 14:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
190508-021IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 7, 2019 14:00, sampling point TF080 Arsenic 1005 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
0.015 mg/l , sample collected May 7, 2019 14:00, sampling point TF080 Barium 1010 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 7, 2019 14:00, sampling point TF080 Cadmium 1015 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
0.001 mg/l , sample collected May 7, 2019 14:00, sampling point TF080 Chromium 1020 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
0.11 mg/l , sample collected May 7, 2019 14:00, sampling point TF080 Fluoride 1025 EPA method 300.0 Jan 1, 2017 – Dec 31, 2019
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 7, 2019 14:00, sampling point TF080 Mercury 1035 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
0.0006 mg/l , sample collected May 7, 2019 14:00, sampling point TF080 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 7, 2019 14:00, sampling point TF080 Selenium 1045 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 7, 2019 14:00, sampling point TF080 Antimony, Total 1074 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 7, 2019 14:00, sampling point TF080 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 7, 2019 14:00, sampling point TF080 Thallium, Total 1085 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
Collected
Apr 10, 2019 13:45
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
190411-034CN
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Apr 10, 2019 13:45, sampling point TF080 Cyanide 1024 EPA method QC10204001X Jan 1, 2017 – Dec 31, 2019
Collected
Mar 7, 2018 15:50
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
180308-039NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 7, 2018 15:50, sampling point TF080 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2018 – Dec 31, 2018
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 7, 2018 15:50, sampling point TF080 Nitrate 1040 EPA method QC10107041C Jan 1, 2018 – Dec 31, 2018
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 7, 2018 15:50, sampling point TF080 Nitrite 1041 EPA method QC10107041C Jan 1, 2018 – Dec 31, 2018
Collected
Jul 5, 2017 08:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
170706-039PB
Laboratory
MSDH Lab
0.0018 mg/l , sample collected Jul 5, 2017 08:00, 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 Jul 5, 2017 08:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017

Routine (10).