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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

MS0170043 , Walls Water Assn- Lake Forest

13 samples have been analysed for TTHM at Walls Water Assn- Lake Forest.

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 24, 2015 to July 28, 2026.

10 TTHM results from the 10 samples listed here: 10 detected, 0 not detected. Those samples also carried 36 results for other analytes, which are on the full results page.

TTHM results for Walls Water Assn- Lake Forest, 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
Jul 28, 2026 09:05
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
810-201948-1
Laboratory
Eurofins Eaton Analytical South Bend in
3.64 ug/l , sample collected Jul 28, 2026 09:05, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2026 – Dec 31, 2026
Collected
Aug 7, 2025 10:40
Sampling point
SM3 Stage 2 DBP
Sample type
Routine
Lab sample
810-159045-1
Laboratory
Eurofins Eaton Analytical South Bend in
1.89 ug/l , sample collected Aug 7, 2025 10:40, sampling point SM3 TTHM 2950 EPA method 524.2 Not recorded
Collected
Mar 18, 2024 09:15
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
TH-240319-012
Laboratory
MSDH Lab
1.31 ug/l , sample collected Mar 18, 2024 09:15, sampling point MRT000 TTHM 2950 EPA method 524.2 Not recorded
Collected
May 22, 2023 13:45
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
TH-230523-007
Laboratory
MSDH Lab
5.5 ug/l , sample collected May 22, 2023 13:45, sampling point MRT000 TTHM 2950 EPA method 524.2 Not recorded
Collected
Mar 1, 2022 13:30
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
TH-220302-016
Laboratory
MSDH Lab
3.83 ug/l , sample collected Mar 1, 2022 13:30, sampling point MRT000 TTHM 2950 EPA method 524.2 Not recorded
Collected
Aug 31, 2021 13:05
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
TH-210901-004
Laboratory
MSDH Lab
19.3 ug/l , sample collected Aug 31, 2021 13:05, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2021 – Dec 31, 2021
Collected
Aug 25, 2020 14:15
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
200826-004TH
Laboratory
MSDH Lab
30.2 ug/l , sample collected Aug 25, 2020 14:15, sampling point MRT000 TTHM 2950 Jan 1, 2020 – Dec 31, 2020
Collected
Jul 17, 2019 13:10
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
190718-007TH
Laboratory
MSDH Lab
4.2 ug/l , sample collected Jul 17, 2019 13:10, sampling point MRT000 TTHM 2950 Jan 1, 2019 – Dec 31, 2019
Collected
Jul 24, 2018 15:07
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
180725-020TH
Laboratory
MSDH Lab
3.83 ug/l , sample collected Jul 24, 2018 15:07, sampling point MRT000 TTHM 2950 Jan 1, 2017 – Dec 31, 2019
Collected
Jun 24, 2015 02:17
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
150625-015TH
Laboratory
MSDH Lab
3.86 ug/l , sample collected Jun 24, 2015 02:17, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2014 – Dec 31, 2016

Routine (10).