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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 21–30 of 140 samples, newest first — collected July 21, 2020 to October 19, 2022. The summary above covers all 140.

27 results from the 10 samples listed here: 7 detected, 20 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 21 to 30 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
Oct 19, 2022 13:15
Sampling point
SM1 Site#1 Area 5 Lab
Sample type
Routine
Lab sample
HA-221020-009
Laboratory
MSDH Lab
1.86 ug/l , sample collected Oct 19, 2022 13:15, sampling point SM1 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2020 – Dec 31, 2022
Collected
Oct 19, 2022 13:15
Sampling point
SM1 Site#1 Area 5 Lab
Sample type
Routine
Lab sample
TH-221020-009
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Oct 19, 2022 13:15, sampling point SM1 TTHM 2950 EPA method 524.2 Jan 1, 2020 – Dec 31, 2022
Collected
Sep 28, 2022 12:30
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
IN-220929-048
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 28, 2022 12:30, sampling point TF080 Arsenic 1005 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.0183 mg/l , sample collected Sep 28, 2022 12:30, sampling point TF080 Barium 1010 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 28, 2022 12:30, sampling point TF080 Cadmium 1015 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 28, 2022 12:30, sampling point TF080 Chromium 1020 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.107 mg/l , sample collected Sep 28, 2022 12:30, sampling point TF080 Fluoride 1025 EPA method QC 10-109-12-2-A Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 28, 2022 12:30, sampling point TF080 Mercury 1035 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 28, 2022 12:30, sampling point TF080 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Sep 28, 2022 12:30, sampling point TF080 Selenium 1045 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 28, 2022 12:30, sampling point TF080 Antimony, Total 1074 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 28, 2022 12:30, sampling point TF080 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 28, 2022 12:30, sampling point TF080 Thallium, Total 1085 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Collected
May 17, 2022 11:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
CN-220518-047
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected May 17, 2022 11:00, sampling point TF080 Cyanide 1024 EPA method QC10204001X Jan 1, 2020 – Dec 31, 2022
Collected
Mar 1, 2022 14:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
NA-220302-027
Laboratory
MSDH Lab
37.4 mg/l , sample collected Mar 1, 2022 14:00, sampling point TF080 Sodium 1052 EPA method 200.7 Not recorded
Collected
Mar 1, 2022 14:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
NI-220302-028
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 1, 2022 14:00, sampling point TF080 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2022 – Dec 31, 2022
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 1, 2022 14:00, sampling point TF080 Nitrate 1040 EPA method QC10107041C Jan 1, 2022 – Dec 31, 2022
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 1, 2022 14:00, sampling point TF080 Nitrite 1041 EPA method QC10107041C Jan 1, 2022 – Dec 31, 2022
Collected
Mar 30, 2021 14:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
NI-210331-001
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 30, 2021 14:00, sampling point TF080 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2021 – Dec 31, 2021
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 30, 2021 14:00, sampling point TF080 Nitrate 1040 EPA method QC10107041C Jan 1, 2021 – Dec 31, 2021
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 30, 2021 14:00, sampling point TF080 Nitrite 1041 EPA method QC10107041C Jan 1, 2021 – Dec 31, 2021
Collected
Jul 22, 2020 15:30
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
200723-070PB
Laboratory
MSDH Lab
0.0011 mg/l , sample collected Jul 22, 2020 15:30, 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 22, 2020 15:30, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2018 – Dec 31, 2020
Collected
Jul 21, 2020 15:40
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
200723-068PB
Laboratory
MSDH Lab
0.0321 mg/l , sample collected Jul 21, 2020 15:40, 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 15:40, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2018 – Dec 31, 2020
Collected
Jul 21, 2020 15:45
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
200723-067PB
Laboratory
MSDH Lab
0.0008 mg/l , sample collected Jul 21, 2020 15:45, 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 15:45, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2018 – Dec 31, 2020

Routine (10).