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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.

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

No date range is applied: this list draws on every sample on record. Show the last two years only.

The most recent samples, result by result

The table below lists 241–250 of 363 samples, newest first — collected September 10, 2009 to December 7, 2009. The summary above covers all 363.

43 results from the 10 samples listed here: 23 detected, 20 not detected. Across the whole record it is 452 of 1,994. 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 Ocean Beach, every result from 241 to 250 of 363 samples shown, 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
Dec 7, 2009
Sampling point
SM1 SM1
Sample type
Routine
Lab sample
091208-011TH
Laboratory
MSDH Lab
24.1 ug/l , sample collected Dec 7, 2009, sampling point SM1 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 7, 2009, sampling point SM1 Bromoform 2942 EPA method 524.2 Not recorded
1.89 ug/l , sample collected Dec 7, 2009, sampling point SM1 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 7, 2009, sampling point SM1 Dibromochloromethane 2944 EPA method 524.2 Not recorded
25.99 ug/l , sample collected Dec 7, 2009, sampling point SM1 TTHM 2950 EPA method 524.2 Not recorded
Collected
Dec 7, 2009
Sampling point
SM2 SM2
Sample type
Routine
Lab sample
091208-032HA
Laboratory
MSDH Lab
0.003 mg/l , sample collected Dec 7, 2009, sampling point SM2 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.001 mg/l , sample collected Dec 7, 2009, sampling point SM2 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Dec 7, 2009, sampling point SM2 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Dec 7, 2009, sampling point SM2 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Dec 7, 2009, sampling point SM2 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0 mg/l This result is recorded as a detection, and the figure the agency wrote — "0.00" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here. , sample collected Dec 7, 2009, sampling point SM2 Total Haloacetic Acids (Haa5) 2456 Not recorded
Collected
Dec 7, 2009
Sampling point
SM1 SM1
Sample type
Routine
Lab sample
091208-031HA
Laboratory
MSDH Lab
0.004 mg/l , sample collected Dec 7, 2009, sampling point SM1 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.016 mg/l , sample collected Dec 7, 2009, sampling point SM1 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
0.005 mg/l , sample collected Dec 7, 2009, sampling point SM1 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Dec 7, 2009, sampling point SM1 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Dec 7, 2009, sampling point SM1 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.02 mg/l , sample collected Dec 7, 2009, sampling point SM1 Total Haloacetic Acids (Haa5) 2456 Not recorded
Collected
Dec 2, 2009
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
091203-003TH
Laboratory
MSDH Lab
42.6 ug/l , sample collected Dec 2, 2009, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 2, 2009, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
7.1 ug/l , sample collected Dec 2, 2009, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
1 ug/l , sample collected Dec 2, 2009, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
50.7 ug/l , sample collected Dec 2, 2009, sampling point MRT000 TTHM 2950 EPA method 524.2 Oct 1, 2009 – Dec 31, 2009
Collected
Dec 2, 2009
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
091203-018HA
Laboratory
MSDH Lab
0.005 mg/l , sample collected Dec 2, 2009, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.026 mg/l , sample collected Dec 2, 2009, sampling point MRT000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
0.023 mg/l , sample collected Dec 2, 2009, sampling point MRT000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Dec 2, 2009, sampling point MRT000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Dec 2, 2009, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.05 mg/l , sample collected Dec 2, 2009, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 Oct 1, 2009 – Dec 31, 2009
Collected
Sep 14, 2009
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
090915-031CN
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Sep 14, 2009, sampling point TF101 Cyanide 1024 EPA method QC10204001X Jan 1, 2008 – Dec 31, 2010
Collected
Sep 14, 2009
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
090915-030CN
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Sep 14, 2009, sampling point TF102 Cyanide 1024 EPA method QC10204001X Jan 1, 2008 – Dec 31, 2010
Collected
Sep 14, 2009
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
090915-029CN
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Sep 14, 2009, sampling point TF103 Cyanide 1024 EPA method QC10204001X Jan 1, 2008 – Dec 31, 2010
Collected
Sep 10, 2009
Sampling point
SM2 SM2
Sample type
Routine
Lab sample
090911-004HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Sep 10, 2009, sampling point SM2 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.025 mg/l , sample collected Sep 10, 2009, sampling point SM2 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
0.018 mg/l , sample collected Sep 10, 2009, sampling point SM2 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 10, 2009, sampling point SM2 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 10, 2009, sampling point SM2 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.04 mg/l , sample collected Sep 10, 2009, sampling point SM2 Total Haloacetic Acids (Haa5) 2456 Not recorded
Collected
Sep 10, 2009
Sampling point
SM1 SM1
Sample type
Routine
Lab sample
090911-003HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Sep 10, 2009, sampling point SM1 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.002 mg/l , sample collected Sep 10, 2009, sampling point SM1 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 10, 2009, sampling point SM1 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 10, 2009, sampling point SM1 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 10, 2009, sampling point SM1 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0 mg/l This result is recorded as a detection, and the figure the agency wrote — "0.00" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here. , sample collected Sep 10, 2009, sampling point SM1 Total Haloacetic Acids (Haa5) 2456 Not recorded

Routine (10).