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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

MS0300113 , Ocean Beach

25 of the 57 analytes this system has been tested for have been detected at least once, across 363 samples on record.

The other 32 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 363 samples on record, detections range from September 22, 2003 to December 10, 2025. 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 Ocean Beach, 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
TTHM 2950 Organic Chemical 61 of 61 results Sep 8, 2004 Dec 10, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 60 of 60 results Sep 8, 2004 Dec 10, 2025
Copper, Free 1022 Inorganic Chemical 59 of 59 results Aug 12, 2008 Jul 12, 2023
Chloroform 2941 Organic Chemical 30 of 30 results Sep 20, 2006 Dec 10, 2025
Bromodichloromethane 2943 Organic Chemical 29 of 30 results Sep 20, 2006 Dec 10, 2025
Barium 1010 Inorganic Chemical 27 of 27 results Sep 22, 2003 Feb 24, 2025
Fluoride 1025 Inorganic Chemical 27 of 27 results Sep 22, 2003 Feb 24, 2025
Dichloroacetic Acid 2451 Organic Chemical 26 of 26 results Oct 11, 2007 Dec 10, 2025
Trichloroacetic Acid 2452 Organic Chemical 24 of 26 results Oct 11, 2007 Dec 10, 2025
Dibromochloromethane 2944 Organic Chemical 24 of 30 results Sep 20, 2006 Dec 10, 2025
Lead 1030 Inorganic Chemical 22 of 59 results Aug 13, 2008 Sep 10, 2020
Chromium 1020 Inorganic Chemical 19 of 27 results Sep 29, 2003 May 18, 2022
Gross Alpha, Incl. Radon & U 4002 Radionuclide 12 of 12 results Dec 7, 2011 Dec 15, 2015
Sulfate 1055 Inorganic Chemical 6 of 6 results Sep 22, 2003 Feb 23, 2004
Monochloroacetic Acid 2450 Organic Chemical 5 of 26 results Jan 31, 2008 Dec 7, 2009
Nickel 1036 Inorganic Chemical 4 of 27 results Jan 12, 2009 May 9, 2017
Sodium 1052 Inorganic Chemical 3 of 3 results Mar 8, 2021 Feb 14, 2024
Selenium 1045 Inorganic Chemical 3 of 27 results Mar 16, 2005 Mar 16, 2005
Nitrate-Nitrite 1038 Inorganic Chemical 2 of 54 results Jun 9, 2008 Feb 14, 2024
Nitrate 1040 Inorganic Chemical 2 of 54 results Jun 9, 2008 Feb 14, 2024
Carbon Tetrachloride 2982 Organic Chemical 2 of 45 results Mar 8, 2017 Mar 8, 2021
Cadmium 1015 Inorganic Chemical 2 of 27 results Mar 16, 2005 Mar 16, 2005
Arsenic 1005 Inorganic Chemical 1 of 27 results Feb 14, 2024 Feb 14, 2024
Combined Radium (-226 & -228) 4010 Radionuclide 1 of 12 results Dec 15, 2015 Dec 15, 2015
Radium-226 4020 Radionuclide 1 of 12 results Dec 15, 2015 Dec 15, 2015

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

36 results from the 10 samples listed here: 13 detected, 23 not detected. A sample is analysed for many analytes at once, so one sample appears on as many rows as it had results.

We withheld the location of 2 sampling points below. The location on record identifies a private home, and we do not publish those. That is our decision, not the agency’s. The sampling point, its type and every result taken there are published unchanged.

Chemical and radiological sample results for Ocean Beach, every result from the 10 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 24, 2026 11:15
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
NI-260225-024
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 24, 2026 11:15, sampling point TF103 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2026 – Dec 31, 2026
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Feb 24, 2026 11:15, sampling point TF103 Nitrate 1040 EPA method QC10107041C Jan 1, 2026 – Dec 31, 2026
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 24, 2026 11:15, sampling point TF103 Nitrite 1041 EPA method QC10107041C Jan 1, 2026 – Dec 31, 2026
Collected
Dec 10, 2025 11:00
Sampling point
SMT Location withheld
Sample type
Routine
Lab sample
810-174937-1
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Dec 10, 2025 11:00, sampling point SMT Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
14 ug/l , sample collected Dec 10, 2025 11:00, sampling point SMT Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
18 ug/l , sample collected Dec 10, 2025 11:00, sampling point SMT Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 10, 2025 11:00, sampling point SMT Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 10, 2025 11:00, sampling point SMT Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
32 ug/l , sample collected Dec 10, 2025 11:00, sampling point SMT Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Not recorded
33 ug/l , sample collected Dec 10, 2025 11:00, sampling point SMT Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 10, 2025 11:00, sampling point SMT Bromoform 2942 EPA method 524.2 Not recorded
6.8 ug/l , sample collected Dec 10, 2025 11:00, sampling point SMT Bromodichloromethane 2943 EPA method 524.2 Not recorded
1.4 ug/l , sample collected Dec 10, 2025 11:00, sampling point SMT Dibromochloromethane 2944 EPA method 524.2 Not recorded
41.2 ug/l , sample collected Dec 10, 2025 11:00, sampling point SMT TTHM 2950 EPA method 524.2 Not recorded
Collected
Aug 25, 2025 13:30
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
CN-250826-003
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Aug 25, 2025 13:30, sampling point TF103 Cyanide 1024 EPA method QC10204001X Jan 1, 2023 – Dec 31, 2025
Collected
Feb 24, 2025 10:00
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
IN-250225-064
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 10:00, sampling point TF103 Arsenic 1005 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.0036 mg/l , sample collected Feb 24, 2025 10:00, sampling point TF103 Barium 1010 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 10:00, sampling point TF103 Cadmium 1015 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 10:00, sampling point TF103 Chromium 1020 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.503 mg/l , sample collected Feb 24, 2025 10:00, sampling point TF103 Fluoride 1025 EPA method QC 10-109-12-2-A Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 10:00, sampling point TF103 Mercury 1035 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 10:00, sampling point TF103 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 10:00, sampling point TF103 Selenium 1045 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 10:00, sampling point TF103 Antimony, Total 1074 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 10:00, sampling point TF103 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 10:00, sampling point TF103 Thallium, Total 1085 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Feb 24, 2025 07:17
Sampling point
TF104 Treatment Facility TF104
Sample type
Routine
Lab sample
NI-250225-014
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 07:17, sampling point TF104 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 07:17, sampling point TF104 Nitrate 1040 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 07:17, sampling point TF104 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Collected
Feb 24, 2025 06:34
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
NI-250225-013
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 06:34, sampling point TF103 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 06:34, sampling point TF103 Nitrate 1040 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 06:34, sampling point TF103 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Collected
Oct 9, 2024 09:29
Sampling point
SMT Location withheld
Sample type
Routine
Lab sample
TH-241010-020
Laboratory
MSDH Lab
40.6 ug/l , sample collected Oct 9, 2024 09:29, sampling point SMT TTHM 2950 EPA method 524.2 Oct 1, 2024 – Dec 31, 2024
Collected
Oct 9, 2024 09:17
Sampling point
SMH Location withheld
Sample type
Routine
Lab sample
TH-241010-019
Laboratory
MSDH Lab
40.3 ug/l , sample collected Oct 9, 2024 09:17, sampling point SMH TTHM 2950 EPA method 524.2 Oct 1, 2024 – Dec 31, 2024
Collected
Oct 9, 2024 09:32
Sampling point
SMT Location withheld
Sample type
Routine
Lab sample
HA-241010-020
Laboratory
MSDH Lab
21.4 ug/l , sample collected Oct 9, 2024 09:32, sampling point SMT Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Oct 1, 2024 – Dec 31, 2024
Collected
Oct 9, 2024 09:19
Sampling point
SMH Location withheld
Sample type
Routine
Lab sample
HA-241010-019
Laboratory
MSDH Lab
17.4 ug/l , sample collected Oct 9, 2024 09:19, sampling point SMH Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Oct 1, 2024 – Dec 31, 2024

Routine (10).