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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

MS0270024 , Humphreys Co-Tchula Lake #7

22 of the 58 analytes this system has been tested for have been detected at least once, across 185 samples on record.

The other 36 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 185 samples on record, detections range from July 28, 1993 to February 10, 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 Humphreys Co-Tchula Lake #7, 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 92 of 112 results Jul 28, 1993 Aug 29, 2024
Lead 1030 Inorganic Chemical 48 of 112 results Jul 28, 1993 Aug 29, 2024
Barium 1010 Inorganic Chemical 10 of 10 results Sep 17, 2003 Feb 10, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 6 of 8 results Aug 16, 2007 Feb 10, 2025
TTHM 2950 Organic Chemical 6 of 7 results Aug 16, 2007 Feb 10, 2025
Fluoride 1025 Inorganic Chemical 6 of 10 results Sep 17, 2003 Mar 2, 2016
Dichloroacetic Acid 2451 Organic Chemical 4 of 4 results Sep 16, 2008 Aug 6, 2018
Trichloroacetic Acid 2452 Organic Chemical 4 of 4 results Sep 16, 2008 Aug 6, 2018
Chloroform 2941 Organic Chemical 4 of 4 results Aug 16, 2007 Sep 24, 2014
Bromodichloromethane 2943 Organic Chemical 4 of 4 results Aug 16, 2007 Sep 24, 2014
Sodium 1052 Inorganic Chemical 3 of 3 results Sep 23, 2019 Feb 7, 2024
Chromium 1020 Inorganic Chemical 3 of 10 results Feb 9, 2004 Mar 2, 2016
Gross Alpha Particle Activity 4109 Radionuclide 2 of 4 results Jun 28, 2012 Sep 10, 2012
Selenium 1045 Inorganic Chemical 2 of 10 results Mar 16, 2005 Feb 27, 2006
Sulfate 1055 Inorganic Chemical 2 of 2 results Sep 17, 2003 Feb 9, 2004
Monobromoacetic Acid 2453 Organic Chemical 1 of 4 results Sep 24, 2014 Sep 24, 2014
Combined Radium (-226 & -228) 4010 Radionuclide 1 of 2 results Dec 5, 2011 Dec 5, 2011
Radium-228 4030 Radionuclide 1 of 2 results Dec 5, 2011 Dec 5, 2011
Nickel 1036 Inorganic Chemical 1 of 10 results Apr 16, 2008 Apr 16, 2008
Nitrite 1041 Inorganic Chemical 1 of 22 results Apr 23, 2007 Apr 23, 2007
Cadmium 1015 Inorganic Chemical 1 of 10 results Mar 16, 2005 Mar 16, 2005
Cyanide 1024 Inorganic Chemical 1 of 10 results Feb 9, 2004 Feb 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 111–120 of 185 samples, newest first — collected June 20, 2002 to September 17, 2003. The summary above covers all 185.

48 results from the 10 samples listed here: 11 detected, 37 not detected. Across the whole record it is 203 of 650. 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 Humphreys Co-Tchula Lake #7, every result from 111 to 120 of 185 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
Sep 17, 2003
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
030918-048CN
Laboratory
MSDH Lab
Not detected below 0.01 mg/l Minimum Reporting Level , sample collected Sep 17, 2003, sampling point TF101 Cyanide 1024 EPA method QC10204001X Jan 1, 2002 – Dec 31, 2004
Collected
Sep 17, 2003
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
030918-026IN
Laboratory
MSDH Lab
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 17, 2003, sampling point TF101 Arsenic 1005 EPA method 200.8 Not recorded
0.026 mg/l , sample collected Sep 17, 2003, sampling point TF101 Barium 1010 EPA method 200.8 Not recorded
Not detected below 0.0001 mg/l Minimum Reporting Level , sample collected Sep 17, 2003, sampling point TF101 Cadmium 1015 EPA method 200.8 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 17, 2003, sampling point TF101 Chromium 1020 EPA method 200.8 Not recorded
0.11 mg/l , sample collected Sep 17, 2003, sampling point TF101 Fluoride 1025 EPA method 300.0 Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 17, 2003, sampling point TF101 Mercury 1035 EPA method 200.8 Not recorded
Not detected below 0.005 mg/l Minimum Reporting Level , sample collected Sep 17, 2003, sampling point TF101 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 17, 2003, sampling point TF101 Selenium 1045 EPA method 200.8 Not recorded
10.8 mg/l , sample collected Sep 17, 2003, sampling point TF101 Sulfate 1055 EPA method 300.0 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 17, 2003, sampling point TF101 Antimony, Total 1074 EPA method 200.8 Not recorded
Not detected below 0.0003 mg/l Minimum Reporting Level , sample collected Sep 17, 2003, sampling point TF101 Beryllium, Total 1075 EPA method 200.8 Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 17, 2003, sampling point TF101 Thallium, Total 1085 EPA method 200.8 Not recorded
Collected
Jun 25, 2002
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
020626-003VO
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 25, 2002, sampling point TF101 1,2,4-Trichlorobenzene 2378 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 25, 2002, sampling point TF101 Cis-1,2-Dichloroethylene 2380 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 25, 2002, sampling point TF101 Xylenes, Total 2955 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 25, 2002, sampling point TF101 Dichloromethane 2964 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 25, 2002, sampling point TF101 O-Dichlorobenzene 2968 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 25, 2002, sampling point TF101 P-Dichlorobenzene 2969 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 25, 2002, sampling point TF101 Vinyl Chloride 2976 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 25, 2002, sampling point TF101 1,1-Dichloroethylene 2977 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 25, 2002, sampling point TF101 Trans-1,2-Dichloroethylene 2979 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 25, 2002, sampling point TF101 1,2-Dichloroethane 2980 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 25, 2002, sampling point TF101 1,1,1-Trichloroethane 2981 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 25, 2002, sampling point TF101 Carbon Tetrachloride 2982 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 25, 2002, sampling point TF101 1,2-Dichloropropane 2983 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 25, 2002, sampling point TF101 Trichloroethylene 2984 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 25, 2002, sampling point TF101 1,1,2-Trichloroethane 2985 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 25, 2002, sampling point TF101 Tetrachloroethylene 2987 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 25, 2002, sampling point TF101 Chlorobenzene 2989 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 25, 2002, sampling point TF101 Benzene 2990 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 25, 2002, sampling point TF101 Toluene 2991 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 25, 2002, sampling point TF101 Ethylbenzene 2992 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 25, 2002, sampling point TF101 Styrene 2996 Not recorded
Collected
Jun 20, 2002
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
020621-030PB
Laboratory
MSDH Lab
0.02 mg/l , sample collected Jun 20, 2002, sampling point DS000 Copper, Free 1022 Not recorded
Not detected below 0.001 mg/l Method Detection Limit , sample collected Jun 20, 2002, sampling point DS000 Lead 1030 Not recorded
Collected
Jun 20, 2002
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
020621-029PB
Laboratory
MSDH Lab
0.008 mg/l , sample collected Jun 20, 2002, sampling point DS000 Copper, Free 1022 Not recorded
Not detected below 0.001 mg/l Method Detection Limit , sample collected Jun 20, 2002, sampling point DS000 Lead 1030 Not recorded
Collected
Jun 20, 2002
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
020621-028PB
Laboratory
MSDH Lab
0.006 mg/l , sample collected Jun 20, 2002, sampling point DS000 Copper, Free 1022 Not recorded
Not detected below 0.001 mg/l Method Detection Limit , sample collected Jun 20, 2002, sampling point DS000 Lead 1030 Not recorded
Collected
Jun 20, 2002
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
020621-027PB
Laboratory
MSDH Lab
0.026 mg/l , sample collected Jun 20, 2002, sampling point DS000 Copper, Free 1022 Not recorded
Not detected below 0.001 mg/l Method Detection Limit , sample collected Jun 20, 2002, sampling point DS000 Lead 1030 Not recorded
Collected
Jun 20, 2002
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
020621-026PB
Laboratory
MSDH Lab
0.004 mg/l , sample collected Jun 20, 2002, sampling point DS000 Copper, Free 1022 Not recorded
Not detected below 0.001 mg/l Method Detection Limit , sample collected Jun 20, 2002, sampling point DS000 Lead 1030 Not recorded
Collected
Jun 20, 2002
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
020621-025PB
Laboratory
MSDH Lab
0.008 mg/l , sample collected Jun 20, 2002, sampling point DS000 Copper, Free 1022 Not recorded
Not detected below 0.001 mg/l Method Detection Limit , sample collected Jun 20, 2002, sampling point DS000 Lead 1030 Not recorded
Collected
Jun 20, 2002
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
020621-024PB
Laboratory
MSDH Lab
0.016 mg/l , sample collected Jun 20, 2002, sampling point DS000 Copper, Free 1022 Not recorded
0.002 mg/l , sample collected Jun 20, 2002, sampling point DS000 Lead 1030 Not recorded

Routine (10).