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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 41–50 of 185 samples, newest first — collected September 24, 2014 to April 6, 2016. The summary above covers all 185.

33 results from the 10 samples listed here: 13 detected, 20 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 41 to 50 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
Apr 6, 2016 14:35
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
160407-033NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 6, 2016 14:35, sampling point TF101 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2016 – Dec 31, 2016
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Apr 6, 2016 14:35, sampling point TF101 Nitrate 1040 EPA method QC10107041C Jan 1, 2016 – Dec 31, 2016
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 6, 2016 14:35, sampling point TF101 Nitrite 1041 EPA method QC10107041C Jan 1, 2016 – Dec 31, 2016
Collected
Mar 2, 2016 12:15
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
160303-012IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 2, 2016 12:15, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
0.0039 mg/l , sample collected Mar 2, 2016 12:15, sampling point TF101 Barium 1010 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 2, 2016 12:15, sampling point TF101 Cadmium 1015 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
0.0028 mg/l , sample collected Mar 2, 2016 12:15, sampling point TF101 Chromium 1020 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
0.104 mg/l , sample collected Mar 2, 2016 12:15, sampling point TF101 Fluoride 1025 EPA method 300.0 Jan 1, 2014 – Dec 31, 2016
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 2, 2016 12:15, sampling point TF101 Mercury 1035 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 2, 2016 12:15, sampling point TF101 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Mar 2, 2016 12:15, sampling point TF101 Selenium 1045 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 2, 2016 12:15, sampling point TF101 Antimony, Total 1074 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 2, 2016 12:15, sampling point TF101 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 2, 2016 12:15, sampling point TF101 Thallium, Total 1085 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Collected
Jun 16, 2015 15:30
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
150619-068PB
Laboratory
MSDH Lab
0.0038 mg/l , sample collected Jun 16, 2015 15:30, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2013 – Dec 31, 2015
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 16, 2015 15:30, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2013 – Dec 31, 2015
Collected
Jun 16, 2015 15:40
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
150619-067PB
Laboratory
MSDH Lab
0.0532 mg/l , sample collected Jun 16, 2015 15:40, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2013 – Dec 31, 2015
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 16, 2015 15:40, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2013 – Dec 31, 2015
Collected
Jun 16, 2015 05:30
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
150619-066PB
Laboratory
MSDH Lab
0.0124 mg/l , sample collected Jun 16, 2015 05:30, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2013 – Dec 31, 2015
0.0007 mg/l , sample collected Jun 16, 2015 05:30, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2013 – Dec 31, 2015
Collected
Jun 16, 2015 05:15
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
150619-065PB
Laboratory
MSDH Lab
0.2293 mg/l , sample collected Jun 16, 2015 05:15, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2013 – Dec 31, 2015
0.002 mg/l , sample collected Jun 16, 2015 05:15, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2013 – Dec 31, 2015
Collected
Jun 16, 2015 16:50
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
150619-064PB
Laboratory
MSDH Lab
0.1417 mg/l , sample collected Jun 16, 2015 16:50, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2013 – Dec 31, 2015
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 16, 2015 16:50, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2013 – Dec 31, 2015
Collected
Jun 3, 2015 01:20
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
150604-028CN
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Jun 3, 2015 01:20, sampling point TF101 Cyanide 1024 EPA method QC10204001X Jan 1, 2014 – Dec 31, 2016
Collected
Feb 9, 2015 14:30
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
150210-015NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 9, 2015 14:30, sampling point TF101 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2015 – Dec 31, 2015
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Feb 9, 2015 14:30, sampling point TF101 Nitrate 1040 EPA method QC10107041C Jan 1, 2015 – Dec 31, 2015
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 9, 2015 14:30, sampling point TF101 Nitrite 1041 EPA method QC10107041C Jan 1, 2015 – Dec 31, 2015
Collected
Sep 24, 2014 12:45
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
140925-004TH
Laboratory
MSDH Lab
10.9 ug/l , sample collected Sep 24, 2014 12:45, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 24, 2014 12:45, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
2.86 ug/l , sample collected Sep 24, 2014 12:45, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 24, 2014 12:45, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
13.8 ug/l , sample collected Sep 24, 2014 12:45, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2014 – Dec 31, 2016

Routine (10).