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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 91–100 of 140 samples, newest first — collected July 17, 2007 to May 11, 2009. The summary above covers all 140.

70 results from the 10 samples listed here: 2 detected, 68 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 91 to 100 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
May 11, 2009
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
090512-045NI
Laboratory
MSDH Lab
Not detected below 0.25 mg/l Minimum Reporting Level , sample collected May 11, 2009, sampling point TF080 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2009 – Dec 31, 2009
Not detected below 0.2 mg/l Minimum Reporting Level , sample collected May 11, 2009, sampling point TF080 Nitrate 1040 EPA method 353.2 Jan 1, 2009 – Dec 31, 2009
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected May 11, 2009, sampling point TF080 Nitrite 1041 EPA method 353.2 Jan 1, 2009 – Dec 31, 2009
Collected
Dec 15, 2008
Sampling point
TF081 Treatment Plant T081
Sample type
Routine
Lab sample
081216-002NI
Laboratory
MSDH Lab
Not detected below 0.25 mg/l Minimum Reporting Level , sample collected Dec 15, 2008, sampling point TF081 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2008 – Dec 31, 2008
Not detected below 0.2 mg/l Minimum Reporting Level , sample collected Dec 15, 2008, sampling point TF081 Nitrate 1040 EPA method 353.2 Jan 1, 2008 – Dec 31, 2008
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Dec 15, 2008, sampling point TF081 Nitrite 1041 EPA method 353.2 Jan 1, 2008 – Dec 31, 2008
Collected
Sep 23, 2008
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
080924-003VO
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 23, 2008, sampling point TF080 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2008 – Dec 31, 2008
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 23, 2008, sampling point TF080 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2008 – Dec 31, 2008
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 23, 2008, sampling point TF080 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2008 – Dec 31, 2008
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 23, 2008, sampling point TF080 Dichloromethane 2964 EPA method 524.2 Jan 1, 2008 – Dec 31, 2008
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 23, 2008, sampling point TF080 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2008 – Dec 31, 2008
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 23, 2008, sampling point TF080 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2008 – Dec 31, 2008
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 23, 2008, sampling point TF080 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2008 – Dec 31, 2008
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 23, 2008, sampling point TF080 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2008 – Dec 31, 2008
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 23, 2008, sampling point TF080 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2008 – Dec 31, 2008
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 23, 2008, sampling point TF080 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2008 – Dec 31, 2008
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 23, 2008, sampling point TF080 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2008 – Dec 31, 2008
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 23, 2008, sampling point TF080 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2008 – Dec 31, 2008
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 23, 2008, sampling point TF080 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2008 – Dec 31, 2008
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 23, 2008, sampling point TF080 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2008 – Dec 31, 2008
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 23, 2008, sampling point TF080 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2008 – Dec 31, 2008
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 23, 2008, sampling point TF080 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2008 – Dec 31, 2008
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 23, 2008, sampling point TF080 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2008 – Dec 31, 2008
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 23, 2008, sampling point TF080 Benzene 2990 EPA method 524.2 Jan 1, 2008 – Dec 31, 2008
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 23, 2008, sampling point TF080 Toluene 2991 EPA method 524.2 Jan 1, 2008 – Dec 31, 2008
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 23, 2008, sampling point TF080 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2008 – Dec 31, 2008
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 23, 2008, sampling point TF080 Styrene 2996 EPA method 524.2 Jan 1, 2008 – Dec 31, 2008
Collected
Jul 9, 2008
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
080710-046NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jul 9, 2008, sampling point TF080 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2008 – Dec 31, 2008
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jul 9, 2008, sampling point TF080 Nitrate 1040 EPA method 353.2 Jan 1, 2008 – Dec 31, 2008
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jul 9, 2008, sampling point TF080 Nitrite 1041 EPA method 353.2 Jan 1, 2008 – Dec 31, 2008
Collected
Nov 13, 2007
Sampling point
TF081 Treatment Plant T081
Sample type
Routine
Lab sample
071114-011NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Nov 13, 2007, sampling point TF081 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2007 – Dec 31, 2007
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Nov 13, 2007, sampling point TF081 Nitrate 1040 EPA method 353.2 Jan 1, 2007 – Dec 31, 2007
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Nov 13, 2007, sampling point TF081 Nitrite 1041 EPA method 353.2 Jan 1, 2007 – Dec 31, 2007
Collected
Nov 13, 2007
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
071114-021NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Nov 13, 2007, sampling point TF080 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2007 – Dec 31, 2007
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Nov 13, 2007, sampling point TF080 Nitrate 1040 EPA method 353.2 Jan 1, 2007 – Dec 31, 2007
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Nov 13, 2007, sampling point TF080 Nitrite 1041 EPA method 353.2 Jan 1, 2007 – Dec 31, 2007
Collected
Oct 4, 2007
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
071005-002VO
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 4, 2007, sampling point TF080 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2007 – Dec 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 4, 2007, sampling point TF080 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2007 – Dec 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 4, 2007, sampling point TF080 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2007 – Dec 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 4, 2007, sampling point TF080 Dichloromethane 2964 EPA method 524.2 Jan 1, 2007 – Dec 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 4, 2007, sampling point TF080 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2007 – Dec 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 4, 2007, sampling point TF080 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2007 – Dec 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 4, 2007, sampling point TF080 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2007 – Dec 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 4, 2007, sampling point TF080 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2007 – Dec 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 4, 2007, sampling point TF080 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2007 – Dec 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 4, 2007, sampling point TF080 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2007 – Dec 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 4, 2007, sampling point TF080 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2007 – Dec 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 4, 2007, sampling point TF080 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2007 – Dec 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 4, 2007, sampling point TF080 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2007 – Dec 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 4, 2007, sampling point TF080 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2007 – Dec 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 4, 2007, sampling point TF080 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2007 – Dec 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 4, 2007, sampling point TF080 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2007 – Dec 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 4, 2007, sampling point TF080 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2007 – Dec 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 4, 2007, sampling point TF080 Benzene 2990 EPA method 524.2 Jan 1, 2007 – Dec 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 4, 2007, sampling point TF080 Toluene 2991 EPA method 524.2 Jan 1, 2007 – Dec 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 4, 2007, sampling point TF080 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2007 – Dec 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 4, 2007, sampling point TF080 Styrene 2996 EPA method 524.2 Jan 1, 2007 – Dec 31, 2007
Collected
Aug 27, 2007
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
070828-012HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Aug 27, 2007, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Aug 27, 2007, 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 27, 2007, 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 27, 2007, sampling point MRT000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Aug 27, 2007, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 0.006 mg/l Minimum Reporting Level , sample collected Aug 27, 2007, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 Jan 1, 2005 – Dec 31, 2007
Collected
Aug 27, 2007
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
070828-010TH
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 27, 2007, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 27, 2007, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 27, 2007, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 27, 2007, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
0 This result is recorded as a detection, and the figure the agency wrote — "0.00" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here. The agency recorded a value but no unit of measure for it. The unit is NOT inferable from the analyte: many analytes are reported in more than one unit — TTHM and HAA5 in both MG/L and UG/L — so there is no per-analyte default to fall back on. The number is published as it stands and must not be compared to a limit. The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected Aug 27, 2007, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2005 – Dec 31, 2007
Collected
Jul 17, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070718-200PB
Laboratory
MSDH Lab
0.0007 mg/l , sample collected Jul 17, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 17, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008

Routine (10).