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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 141–150 of 185 samples, newest first — collected July 23, 1996 to May 31, 2001. The summary above covers all 185.

20 results from the 10 samples listed here: 10 detected, 10 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 141 to 150 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
May 31, 2001
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
010601-003L
Laboratory
MSDH Lab
0.005 mg/l , sample collected May 31, 2001, sampling point DS000 Copper, Free 1022 Not recorded
Not detected below 0.001 mg/l Method Detection Limit , sample collected May 31, 2001, sampling point DS000 Lead 1030 Not recorded
Collected
May 31, 2001
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
010601-002L
Laboratory
MSDH Lab
0.006 mg/l , sample collected May 31, 2001, sampling point DS000 Copper, Free 1022 Not recorded
Not detected below 0.001 mg/l Method Detection Limit , sample collected May 31, 2001, sampling point DS000 Lead 1030 Not recorded
Collected
May 31, 2001
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
010601-001L
Laboratory
MSDH Lab
0.051 mg/l , sample collected May 31, 2001, sampling point DS000 Copper, Free 1022 Not recorded
Not detected below 0.001 mg/l Method Detection Limit , sample collected May 31, 2001, sampling point DS000 Lead 1030 Not recorded
Collected
Oct 29, 2000
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
001107-044L
Laboratory
MSDH Lab
0.012 mg/l , sample collected Oct 29, 2000, sampling point DS000 Copper, Free 1022 Not recorded
0.032 mg/l , sample collected Oct 29, 2000, sampling point DS000 Lead 1030 Not recorded
Collected
Oct 28, 2000
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
001107-040L
Laboratory
MSDH Lab
0.004 mg/l , sample collected Oct 28, 2000, sampling point DS000 Copper, Free 1022 Not recorded
Not detected below 0.001 mg/l Method Detection Limit , sample collected Oct 28, 2000, sampling point DS000 Lead 1030 Not recorded
Collected
Oct 28, 2000
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
001107-035L
Laboratory
MSDH Lab
0.004 mg/l , sample collected Oct 28, 2000, sampling point DS000 Copper, Free 1022 Not recorded
Not detected below 0.001 mg/l Method Detection Limit , sample collected Oct 28, 2000, sampling point DS000 Lead 1030 Not recorded
Collected
Oct 23, 2000
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
001107-038L
Laboratory
MSDH Lab
0.007 mg/l , sample collected Oct 23, 2000, sampling point DS000 Copper, Free 1022 Not recorded
0.004 mg/l , sample collected Oct 23, 2000, sampling point DS000 Lead 1030 Not recorded
Collected
Oct 21, 2000
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
001107-045L
Laboratory
MSDH Lab
0.086 mg/l , sample collected Oct 21, 2000, sampling point DS000 Copper, Free 1022 Not recorded
Not detected below 0.001 mg/l Method Detection Limit , sample collected Oct 21, 2000, sampling point DS000 Lead 1030 Not recorded
Collected
Jul 23, 1996
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
960724-220L
Laboratory
MSDH Lab
Not detected below 0.02 mg/l Method Detection Limit , sample collected Jul 23, 1996, sampling point DS000 Copper, Free 1022 Not recorded
Not detected below 0.001 mg/l Method Detection Limit , sample collected Jul 23, 1996, sampling point DS000 Lead 1030 Not recorded
Collected
Jul 23, 1996
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
960724-219L
Laboratory
MSDH Lab
Not detected below 0.02 mg/l Method Detection Limit , sample collected Jul 23, 1996, sampling point DS000 Copper, Free 1022 Not recorded
Not detected below 0.001 mg/l Method Detection Limit , sample collected Jul 23, 1996, sampling point DS000 Lead 1030 Not recorded

Routine (10).