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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.

Nitrite results

MS0700011 , Town of Walnut

43 samples have been analysed for Nitrite at Town of Walnut.

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 Nitrite result

The table below lists 1–10 of 43 samples, newest first — collected October 18, 2021 to July 16, 2026.

10 Nitrite results from the 10 samples listed here: 2 detected, 8 not detected. Those samples also carried 21 results for other analytes, which are on the full results page.

Nitrite results for Town of Walnut, from 1 to 10 of 43 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 16, 2026
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
35051660002
Laboratory
Pace Analytical Services, LLC
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Jul 16, 2026, sampling point TF102 Nitrite 1041 EPA method 353.2 Not recorded
Collected
Apr 16, 2025 13:00
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
NI-250417-009
Laboratory
MSDH Lab
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 16, 2025 13:00, sampling point TF102 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Collected
Apr 16, 2025 13:10
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
NI-250417-008
Laboratory
MSDH Lab
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 16, 2025 13:10, sampling point TF101 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Collected
Apr 17, 2024 13:15
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
NI-240418-041
Laboratory
MSDH Lab
0.0348 mg/l , sample collected Apr 17, 2024 13:15, sampling point TF102 Nitrite 1041 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Collected
Apr 17, 2024 13:00
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
NI-240418-040
Laboratory
MSDH Lab
0.0375 mg/l , sample collected Apr 17, 2024 13:00, sampling point TF101 Nitrite 1041 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Collected
Mar 8, 2023 15:00
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
NI-230309-044
Laboratory
MSDH Lab
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 8, 2023 15:00, sampling point TF102 Nitrite 1041 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Collected
Mar 8, 2023 15:15
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
NI-230309-043
Laboratory
MSDH Lab
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 8, 2023 15:15, sampling point TF101 Nitrite 1041 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Collected
Apr 6, 2022 14:00
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
NI-220407-042
Laboratory
MSDH Lab
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 6, 2022 14:00, sampling point TF102 Nitrite 1041 EPA method QC10107041C Jan 1, 2022 – Dec 31, 2022
Collected
Apr 6, 2022 14:20
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
NI-220407-036
Laboratory
MSDH Lab
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 6, 2022 14:20, sampling point TF101 Nitrite 1041 EPA method QC10107041C Jan 1, 2022 – Dec 31, 2022
Collected
Oct 18, 2021 15:00
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
NI-211019-006
Laboratory
MSDH Lab
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Oct 18, 2021 15:00, sampling point TF102 Nitrite 1041 EPA method QC10107041C Jan 1, 2021 – Dec 31, 2021

Routine (10).