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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.

TTHM results

MS0110011 , Entergy Operations, Inc

13 samples have been analysed for TTHM at Entergy Operations, Inc.

This is one analyte out of the system’s whole record. For what has ever been detected here, and when, see all chemical and radiological results; for everything the system is tested for, see the analyte list.

What counts as a non-detect is defined in the help: Less than Indicator. This system’s violations.

No date range is applied: this list draws on every sample on record. Show the last two years only.

Every TTHM result

The table below lists 1–10 of 13 samples, newest first — collected June 4, 2007 to December 15, 2025.

10 TTHM results from the 10 samples listed here: 9 detected, 1 not detected. Those samples also carried 24 results for other analytes, which are on the full results page.

TTHM results for Entergy Operations, Inc, from 1 to 10 of 13 samples shown analysed for it, newest first. This view leaves out other analytes on the same samples. Not detected means the amount was below the level the laboratory can reliably report, which is given beside it.
Result Analyte Monitoring period
Collected
Dec 15, 2025 09:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
810-175534-1
Laboratory
Eurofins Eaton Analytical South Bend in
8.51 ug/l , sample collected Dec 15, 2025 09:00, sampling point DS000 TTHM 2950 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Collected
Mar 13, 2025 09:19
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
TH-250313-011
Laboratory
MSDH Lab
2.43 ug/l , sample collected Mar 13, 2025 09:19, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Collected
Mar 19, 2024 12:47
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
TH-240320-009
Laboratory
MSDH Lab
11.3 ug/l , sample collected Mar 19, 2024 12:47, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2024 – Dec 31, 2024
Collected
Mar 21, 2023 13:45
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
TH-230322-008
Laboratory
MSDH Lab
11.3 ug/l , sample collected Mar 21, 2023 13:45, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2023 – Dec 31, 2023
Collected
Sep 12, 2022 10:30
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
TH-220913-008
Laboratory
MSDH Lab
2.32 ug/l , sample collected Sep 12, 2022 10:30, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2020 – Dec 31, 2022
Collected
May 15, 2019 14:00
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
190516-009TH
Laboratory
MSDH Lab
Not detected below 4 ug/l Minimum Reporting Level , sample collected May 15, 2019 14:00, sampling point MRT000 TTHM 2950 Jan 1, 2017 – Dec 31, 2019
Collected
Aug 18, 2014 04:42
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
140819-020TH
Laboratory
MSDH Lab
20.5 ug/l , sample collected Aug 18, 2014 04:42, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2014 – Dec 31, 2016
Collected
Jul 12, 2012 03:30
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
120713-004TH
Laboratory
MSDH Lab
14.11 ug/l , sample collected Jul 12, 2012 03:30, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2011 – Dec 31, 2013
Collected
Jun 9, 2010
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
100610-009TH
Laboratory
MSDH Lab
9.46 ug/l , sample collected Jun 9, 2010, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2008 – Dec 31, 2010
Collected
Jun 4, 2007
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
070605-013TH
Laboratory
MSDH Lab
14.05 ug/l , sample collected Jun 4, 2007, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2007 – Dec 31, 2007

Routine (10).