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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 191–200 of 363 samples, newest first — collected July 9, 2012 to August 29, 2013. The summary above covers all 363.

75 results from the 10 samples listed here: 9 detected, 66 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 191 to 200 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
Aug 29, 2013 03:10
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
130830-004VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 03:10, sampling point TF103 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 03:10, sampling point TF103 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 03:10, sampling point TF103 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 03:10, sampling point TF103 Dichloromethane 2964 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 03:10, sampling point TF103 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 03:10, sampling point TF103 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 03:10, sampling point TF103 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 03:10, sampling point TF103 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 03:10, sampling point TF103 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 03:10, sampling point TF103 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 03:10, sampling point TF103 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 03:10, sampling point TF103 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 03:10, sampling point TF103 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 03:10, sampling point TF103 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 03:10, sampling point TF103 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 03:10, sampling point TF103 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 03:10, sampling point TF103 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 03:10, sampling point TF103 Benzene 2990 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 03:10, sampling point TF103 Toluene 2991 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 03:10, sampling point TF103 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 03:10, sampling point TF103 Styrene 2996 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Collected
Aug 29, 2013 02:50
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
130830-003VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 02:50, sampling point TF101 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 02:50, sampling point TF101 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 02:50, sampling point TF101 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 02:50, sampling point TF101 Dichloromethane 2964 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 02:50, sampling point TF101 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 02:50, sampling point TF101 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 02:50, sampling point TF101 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 02:50, sampling point TF101 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 02:50, sampling point TF101 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 02:50, sampling point TF101 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 02:50, sampling point TF101 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 02:50, sampling point TF101 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 02:50, sampling point TF101 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 02:50, sampling point TF101 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 02:50, sampling point TF101 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 02:50, sampling point TF101 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 02:50, sampling point TF101 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 02:50, sampling point TF101 Benzene 2990 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 02:50, sampling point TF101 Toluene 2991 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 02:50, sampling point TF101 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 29, 2013 02:50, sampling point TF101 Styrene 2996 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Collected
Jun 13, 2013 01:00
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
130614-002HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Jun 13, 2013 01:00, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.011 mg/l , sample collected Jun 13, 2013 01:00, sampling point MRT000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
0.003 mg/l , sample collected Jun 13, 2013 01:00, sampling point MRT000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jun 13, 2013 01:00, sampling point MRT000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jun 13, 2013 01:00, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.014 mg/l , sample collected Jun 13, 2013 01:00, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 Jan 1, 2013 – Dec 31, 2013
Collected
Jun 13, 2013 01:00
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
130614-002TH
Laboratory
MSDH Lab
11.5 ug/l , sample collected Jun 13, 2013 01:00, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 13, 2013 01:00, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 13, 2013 01:00, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 13, 2013 01:00, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
11.5 ug/l , sample collected Jun 13, 2013 01:00, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Collected
Feb 11, 2013 02:00
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
130212-050NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 11, 2013 02:00, sampling point TF103 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Feb 11, 2013 02:00, sampling point TF103 Nitrate 1040 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 11, 2013 02:00, sampling point TF103 Nitrite 1041 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Collected
Feb 11, 2013 02:16
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
130212-049NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 11, 2013 02:16, sampling point TF101 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Feb 11, 2013 02:16, sampling point TF101 Nitrate 1040 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 11, 2013 02:16, sampling point TF101 Nitrite 1041 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Collected
Jul 10, 2012 12:15
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
201212100031
Laboratory
Radiation Safety Engineering
1.8 pci/l , sample collected Jul 10, 2012 12:15, sampling point TF103 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.234 pci/l Minimum Reporting Level , sample collected Jul 10, 2012 12:15, sampling point TF103 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.234 pci/l Minimum Reporting Level , sample collected Jul 10, 2012 12:15, sampling point TF103 Radium-226 4020 EPA method 903.1 Jul 1, 2012 – Sep 30, 2012
Not detected below 0.22 pci/l Minimum Reporting Level , sample collected Jul 10, 2012 12:15, sampling point TF103 Radium-228 4030 EPA method 904.0 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 10, 2012 13:30
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
201212100026
Laboratory
Radiation Safety Engineering
1.8 pci/l , sample collected Jul 10, 2012 13:30, sampling point TF101 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.21 pci/l Minimum Reporting Level , sample collected Jul 10, 2012 13:30, sampling point TF101 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.204 pci/l Minimum Reporting Level , sample collected Jul 10, 2012 13:30, sampling point TF101 Radium-226 4020 EPA method 903.1 Jul 1, 2012 – Sep 30, 2012
Not detected below 0.21 pci/l Minimum Reporting Level , sample collected Jul 10, 2012 13:30, sampling point TF101 Radium-228 4030 EPA method 904.0 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 9, 2012 12:30
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
120710-111
Laboratory
Radiation Safety Engineering
1.8 pci/l , sample collected Jul 9, 2012 12:30, sampling point TF103 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.234 pci/l Minimum Reporting Level , sample collected Jul 9, 2012 12:30, sampling point TF103 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.234 pci/l Minimum Reporting Level , sample collected Jul 9, 2012 12:30, sampling point TF103 Radium-226 4020 EPA method 903.1 Jul 1, 2012 – Sep 30, 2012
Not detected below 0.22 pci/l Minimum Reporting Level , sample collected Jul 9, 2012 12:30, sampling point TF103 Radium-228 4030 EPA method 904.0 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 9, 2012 13:00
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
120710-117
Laboratory
Radiation Safety Engineering
1.8 pci/l , sample collected Jul 9, 2012 13:00, sampling point TF101 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.21 pci/l Minimum Reporting Level , sample collected Jul 9, 2012 13:00, sampling point TF101 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.204 pci/l Minimum Reporting Level , sample collected Jul 9, 2012 13:00, sampling point TF101 Radium-226 4020 EPA method 903.1 Jul 1, 2012 – Sep 30, 2012
Not detected below 0.21 pci/l Minimum Reporting Level , sample collected Jul 9, 2012 13:00, sampling point TF101 Radium-228 4030 EPA method 904.0 Jul 1, 2012 – Sep 30, 2012

Routine (10).