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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.

Arsenic results

MS0140010 , Town of Lyon

12 samples have been analysed for Arsenic at Town of Lyon.

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 Arsenic result

The table below lists 1–10 of 12 samples, newest first — collected January 26, 2004 to March 12, 2025.

10 Arsenic results from the 10 samples listed here: 10 detected, 0 not detected. Those samples also carried 102 results for other analytes, which are on the full results page.

Arsenic results for Town of Lyon, from 1 to 10 of 12 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
Mar 12, 2025 13:21
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
IN-250313-003
Laboratory
MSDH Lab
0.0014 mg/l , sample collected Mar 12, 2025 13:21, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
May 11, 2022 12:15
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
IN-220512-023
Laboratory
MSDH Lab
0.0016 mg/l , sample collected May 11, 2022 12:15, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Collected
Apr 22, 2020 13:15
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
200423-028IN
Laboratory
MSDH Lab
0.0018 mg/l , sample collected Apr 22, 2020 13:15, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Collected
Sep 24, 2018 01:00
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
180925-013IN
Laboratory
MSDH Lab
0.0014 mg/l , sample collected Sep 24, 2018 01:00, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
Collected
Apr 23, 2014 01:05
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
140424-027IN
Laboratory
MSDH Lab
0.0011 mg/l , sample collected Apr 23, 2014 01:05, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Collected
May 4, 2011
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
110505-025IN
Laboratory
MSDH Lab
0.0027 mg/l , sample collected May 4, 2011, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Collected
Mar 24, 2008
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
080325-052IN
Laboratory
MSDH Lab
0.00117 mg/l , sample collected Mar 24, 2008, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Collected
Jan 23, 2006
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
060124-097IN
Laboratory
MSDH Lab
0.001931 mg/l , sample collected Jan 23, 2006, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Collected
Feb 28, 2005
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
050301-001IN
Laboratory
MSDH Lab
0.002104 mg/l , sample collected Feb 28, 2005, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Collected
Jan 26, 2004
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
040127-004IN
Laboratory
MSDH Lab
0.004 mg/l , sample collected Jan 26, 2004, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2002 – Dec 31, 2004

Routine (10).