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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

MS0360039 , Olin Winchester-Oxford

14 of the 51 analytes this system has been tested for have been detected at least once, across 97 samples on record.

The other 37 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 97 samples on record, detections range from September 29, 2003 to February 11, 2026. These figures cover the whole record; the list of samples further down is narrowed.

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 Olin Winchester-Oxford, 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 36 of 36 results Aug 13, 2009 Aug 21, 2024
Nitrate-Nitrite 1038 Inorganic Chemical 20 of 20 results Jul 10, 2006 Feb 11, 2026
Nitrate 1040 Inorganic Chemical 20 of 20 results Jul 10, 2006 Feb 11, 2026
Lead 1030 Inorganic Chemical 12 of 36 results Aug 13, 2009 Jul 7, 2021
Barium 1010 Inorganic Chemical 7 of 7 results Sep 29, 2003 Jan 10, 2024
Nickel 1036 Inorganic Chemical 5 of 7 results Sep 29, 2003 Jan 10, 2024
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 4 of 6 results Jun 14, 2007 Aug 7, 2017
TTHM 2950 Organic Chemical 3 of 6 results Jun 14, 2007 Jun 14, 2011
Monochloroacetic Acid 2450 Organic Chemical 2 of 4 results Jul 14, 2014 Aug 7, 2017
Dichloroacetic Acid 2451 Organic Chemical 2 of 4 results Jun 30, 2008 Jun 14, 2011
Chloroform 2941 Organic Chemical 2 of 5 results Jun 30, 2008 Jun 14, 2011
Bromodichloromethane 2943 Organic Chemical 2 of 5 results Jun 30, 2008 Jun 14, 2011
Sodium 1052 Inorganic Chemical 1 of 1 result Mar 2, 2022 Mar 2, 2022
Dibromochloromethane 2944 Organic Chemical 1 of 5 results Jun 30, 2008 Jun 30, 2008

Showing samples collected between September 25, 2024 and September 25, 2026. That is this page’s default, not a limit on what the agency records.

Show every sample on record

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The most recent samples, result by result

The 3 samples collected between September 25, 2024 and September 25, 2026 are listed below, newest first.

7 results from the 3 samples listed here: 4 detected, 3 not detected. 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 Olin Winchester-Oxford, every result from the 3 samples on record, 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
Feb 11, 2026 09:37
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
NI-260212-002
Laboratory
MSDH Lab
0.689 mg/l , sample collected Feb 11, 2026 09:37, sampling point TF080 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2026 – Dec 31, 2026
0.689 mg/l , sample collected Feb 11, 2026 09:37, sampling point TF080 Nitrate 1040 EPA method QC10107041C Jan 1, 2026 – Dec 31, 2026
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 11, 2026 09:37, sampling point TF080 Nitrite 1041 EPA method QC10107041C Jan 1, 2026 – Dec 31, 2026
Collected
Mar 10, 2025 15:48
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
NI-250311-026
Laboratory
MSDH Lab
0.776 mg/l , sample collected Mar 10, 2025 15:48, sampling point TF080 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
0.776 mg/l , sample collected Mar 10, 2025 15:48, sampling point TF080 Nitrate 1040 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 10, 2025 15:48, sampling point TF080 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Collected
Nov 4, 2024 11:15
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
CN-241105-001
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Nov 4, 2024 11:15, sampling point TF080 Cyanide 1024 EPA method QC10204001X Jan 1, 2022 – Dec 31, 2024

Routine (3).