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.
| 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 201–210 of 363 samples, newest first — collected April 9, 2012 to July 9, 2012. The summary above covers all 363.
45 results from the 10 samples listed here: 15 detected, 30 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.
| Result | Analyte | Monitoring period |
|---|---|---|
|
||
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 9, 2012 13:00, sampling point TF101 | Combined Uranium 4006 EPA method 200.8 | Jul 1, 2012 – Sep 30, 2012 |
|
||
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 9, 2012 12:30, sampling point TF103 | Combined Uranium 4006 EPA method 200.8 | Jul 1, 2012 – Sep 30, 2012 |
|
||
| Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Jun 6, 2012 12:30, sampling point MRT000 | Monochloroacetic Acid 2450 EPA method 552.2 | Not recorded |
| 0.025 mg/l , sample collected Jun 6, 2012 12:30, sampling point MRT000 | Dichloroacetic Acid 2451 EPA method 552.2 | Not recorded |
| 0.015 mg/l , sample collected Jun 6, 2012 12:30, 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 6, 2012 12:30, 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 6, 2012 12:30, sampling point MRT000 | Dibromoacetic Acid 2454 EPA method 552.2 | Not recorded |
| 0.04 mg/l , sample collected Jun 6, 2012 12:30, sampling point MRT000 | Total Haloacetic Acids (Haa5) 2456 | Jan 1, 2012 – Dec 31, 2012 |
|
||
| 50 ug/l , sample collected Jun 6, 2012 12:30, sampling point MRT000 | Chloroform 2941 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 6, 2012 12:30, sampling point MRT000 | Bromoform 2942 EPA method 524.2 | Not recorded |
| 9.95 ug/l , sample collected Jun 6, 2012 12:30, sampling point MRT000 | Bromodichloromethane 2943 EPA method 524.2 | Not recorded |
| 1.59 ug/l , sample collected Jun 6, 2012 12:30, sampling point MRT000 | Dibromochloromethane 2944 EPA method 524.2 | Not recorded |
| 62 ug/l , sample collected Jun 6, 2012 12:30, sampling point MRT000 | TTHM 2950 EPA method 524.2 | Jan 1, 2012 – Dec 31, 2012 |
|
||
| 1.8 pci/l , sample collected Apr 16, 2012 12:00, 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 Apr 16, 2012 12:00, sampling point TF103 | Combined Radium (-226 & -228) 4010 | Not recorded |
| Not detected below 0.234 pci/l Minimum Reporting Level , sample collected Apr 16, 2012 12:00, sampling point TF103 | Radium-226 4020 EPA method 903.1 | Apr 1, 2012 – Jun 30, 2012 |
| Not detected below 0.22 pci/l Minimum Reporting Level , sample collected Apr 16, 2012 12:00, sampling point TF103 | Radium-228 4030 EPA method 904.0 | Apr 1, 2012 – Jun 30, 2012 |
|
||
| 1.8 pci/l , sample collected Apr 16, 2012 12:30, 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 Apr 16, 2012 12:30, sampling point TF101 | Combined Radium (-226 & -228) 4010 | Not recorded |
| Not detected below 0.204 pci/l Minimum Reporting Level , sample collected Apr 16, 2012 12:30, sampling point TF101 | Radium-226 4020 EPA method 903.1 | Apr 1, 2012 – Jun 30, 2012 |
| Not detected below 0.21 pci/l Minimum Reporting Level , sample collected Apr 16, 2012 12:30, sampling point TF101 | Radium-228 4030 EPA method 904.0 | Apr 1, 2012 – Jun 30, 2012 |
|
||
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 16, 2012 12:30, sampling point TF101 | Combined Uranium 4006 EPA method 200.8 | Apr 1, 2012 – Jun 30, 2012 |
|
||
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 16, 2012 12:00, sampling point TF103 | Combined Uranium 4006 EPA method 200.8 | Apr 1, 2012 – Jun 30, 2012 |
|
||
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2012 11:10, sampling point TF101 | Arsenic 1005 EPA method 200.8 | Jan 1, 2011 – Dec 31, 2013 |
| 0.00601 mg/l , sample collected Apr 9, 2012 11:10, sampling point TF101 | Barium 1010 EPA method 200.8 | Jan 1, 2011 – Dec 31, 2013 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2012 11:10, sampling point TF101 | Cadmium 1015 EPA method 200.8 | Jan 1, 2011 – Dec 31, 2013 |
| 0.00245 mg/l , sample collected Apr 9, 2012 11:10, sampling point TF101 | Chromium 1020 EPA method 200.8 | Jan 1, 2011 – Dec 31, 2013 |
| 0.566 mg/l , sample collected Apr 9, 2012 11:10, sampling point TF101 | Fluoride 1025 EPA method 380-75WE | Jan 1, 2011 – Dec 31, 2013 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2012 11:10, sampling point TF101 | Mercury 1035 EPA method 200.8 | Jan 1, 2011 – Dec 31, 2013 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2012 11:10, sampling point TF101 | Nickel 1036 EPA method 200.8 | Not recorded |
| Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Apr 9, 2012 11:10, sampling point TF101 | Selenium 1045 EPA method 200.8 | Jan 1, 2011 – Dec 31, 2013 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2012 11:10, sampling point TF101 | Antimony, Total 1074 EPA method 200.8 | Jan 1, 2011 – Dec 31, 2013 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2012 11:10, sampling point TF101 | Beryllium, Total 1075 EPA method 200.8 | Jan 1, 2011 – Dec 31, 2013 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2012 11:10, sampling point TF101 | Thallium, Total 1085 EPA method 200.8 | Jan 1, 2011 – Dec 31, 2013 |
|
||
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2012 11:00, sampling point TF103 | Arsenic 1005 EPA method 200.8 | Jan 1, 2011 – Dec 31, 2013 |
| 0.00528 mg/l , sample collected Apr 9, 2012 11:00, sampling point TF103 | Barium 1010 EPA method 200.8 | Jan 1, 2011 – Dec 31, 2013 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2012 11:00, sampling point TF103 | Cadmium 1015 EPA method 200.8 | Jan 1, 2011 – Dec 31, 2013 |
| 0.00362 mg/l , sample collected Apr 9, 2012 11:00, sampling point TF103 | Chromium 1020 EPA method 200.8 | Jan 1, 2011 – Dec 31, 2013 |
| 0.702 mg/l , sample collected Apr 9, 2012 11:00, sampling point TF103 | Fluoride 1025 EPA method 380-75WE | Jan 1, 2011 – Dec 31, 2013 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2012 11:00, sampling point TF103 | Mercury 1035 EPA method 200.8 | Jan 1, 2011 – Dec 31, 2013 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2012 11:00, sampling point TF103 | Nickel 1036 EPA method 200.8 | Not recorded |
| Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Apr 9, 2012 11:00, sampling point TF103 | Selenium 1045 EPA method 200.8 | Jan 1, 2011 – Dec 31, 2013 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2012 11:00, sampling point TF103 | Antimony, Total 1074 EPA method 200.8 | Jan 1, 2011 – Dec 31, 2013 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2012 11:00, sampling point TF103 | Beryllium, Total 1075 EPA method 200.8 | Jan 1, 2011 – Dec 31, 2013 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2012 11:00, sampling point TF103 | Thallium, Total 1085 EPA method 200.8 | Jan 1, 2011 – Dec 31, 2013 |
-
- Collected
- Jul 9, 2012 13:00
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- 120710-117RU
- Laboratory
- MSDH Lab
- Monitoring period
- Jul 1, 2012 – Sep 30, 2012
-
Combined Uranium 4006 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Jul 9, 2012 12:30
- Sampling point
- TF103 Treatment Plant T103
- Sample type
- Routine
- Lab sample
- 120710-111RU
- Laboratory
- MSDH Lab
- Monitoring period
- Jul 1, 2012 – Sep 30, 2012
-
Combined Uranium 4006 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Jun 6, 2012 12:30
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 120607-005HA
- Laboratory
- MSDH Lab
-
Monochloroacetic Acid 2450 EPA method 552.2
- Result
- Not detected below 0.002 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dichloroacetic Acid 2451 EPA method 552.2
- Result
- 0.025 mg/l
- Monitoring period
- Not recorded
-
Trichloroacetic Acid 2452 EPA method 552.2
- Result
- 0.015 mg/l
- Monitoring period
- Not recorded
-
Monobromoacetic Acid 2453 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dibromoacetic Acid 2454 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Total Haloacetic Acids (Haa5) 2456
- Result
- 0.04 mg/l
- Monitoring period
- Jan 1, 2012 – Dec 31, 2012
-
- Collected
- Jun 6, 2012 12:30
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 120607-005TH
- Laboratory
- MSDH Lab
-
Chloroform 2941 EPA method 524.2
- Result
- 50 ug/l
- Monitoring period
- Not recorded
-
Bromoform 2942 EPA method 524.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Bromodichloromethane 2943 EPA method 524.2
- Result
- 9.95 ug/l
- Monitoring period
- Not recorded
-
Dibromochloromethane 2944 EPA method 524.2
- Result
- 1.59 ug/l
- Monitoring period
- Not recorded
-
TTHM 2950 EPA method 524.2
- Result
- 62 ug/l
- Monitoring period
- Jan 1, 2012 – Dec 31, 2012
-
- Collected
- Apr 16, 2012 12:00
- Sampling point
- TF103 Treatment Plant T103
- Sample type
- Routine
- Lab sample
- 120417-039
- Laboratory
- Radiation Safety Engineering
-
Gross Alpha, Incl. Radon & U 4002 EPA method 00-02
- Result
- 1.8 pci/l
- Monitoring period
- Not recorded
-
Combined Radium (-226 & -228) 4010
- Result
- Not detected below 0.234 pci/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Radium-226 4020 EPA method 903.1
- Result
- Not detected below 0.234 pci/l Minimum Reporting Level
- Monitoring period
- Apr 1, 2012 – Jun 30, 2012
-
Radium-228 4030 EPA method 904.0
- Result
- Not detected below 0.22 pci/l Minimum Reporting Level
- Monitoring period
- Apr 1, 2012 – Jun 30, 2012
-
- Collected
- Apr 16, 2012 12:30
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- 120417-081
- Laboratory
- Radiation Safety Engineering
-
Gross Alpha, Incl. Radon & U 4002 EPA method 00-02
- Result
- 1.8 pci/l
- Monitoring period
- Not recorded
-
Combined Radium (-226 & -228) 4010
- Result
- Not detected below 0.21 pci/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Radium-226 4020 EPA method 903.1
- Result
- Not detected below 0.204 pci/l Minimum Reporting Level
- Monitoring period
- Apr 1, 2012 – Jun 30, 2012
-
Radium-228 4030 EPA method 904.0
- Result
- Not detected below 0.21 pci/l Minimum Reporting Level
- Monitoring period
- Apr 1, 2012 – Jun 30, 2012
-
- Collected
- Apr 16, 2012 12:30
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- 120417-081RU
- Laboratory
- MSDH Lab
- Monitoring period
- Apr 1, 2012 – Jun 30, 2012
-
Combined Uranium 4006 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Apr 16, 2012 12:00
- Sampling point
- TF103 Treatment Plant T103
- Sample type
- Routine
- Lab sample
- 120417-039RU
- Laboratory
- MSDH Lab
- Monitoring period
- Apr 1, 2012 – Jun 30, 2012
-
Combined Uranium 4006 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Apr 9, 2012 11:10
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- 120412-048IN
- Laboratory
- MSDH Lab
-
Arsenic 1005 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Barium 1010 EPA method 200.8
- Result
- 0.00601 mg/l
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Cadmium 1015 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Chromium 1020 EPA method 200.8
- Result
- 0.00245 mg/l
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Fluoride 1025 EPA method 380-75WE
- Result
- 0.566 mg/l
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Mercury 1035 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Nickel 1036 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Selenium 1045 EPA method 200.8
- Result
- Not detected below 0.0025 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Antimony, Total 1074 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Beryllium, Total 1075 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Thallium, Total 1085 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
- Collected
- Apr 9, 2012 11:00
- Sampling point
- TF103 Treatment Plant T103
- Sample type
- Routine
- Lab sample
- 120412-047IN
- Laboratory
- MSDH Lab
-
Arsenic 1005 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Barium 1010 EPA method 200.8
- Result
- 0.00528 mg/l
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Cadmium 1015 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Chromium 1020 EPA method 200.8
- Result
- 0.00362 mg/l
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Fluoride 1025 EPA method 380-75WE
- Result
- 0.702 mg/l
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Mercury 1035 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Nickel 1036 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Selenium 1045 EPA method 200.8
- Result
- Not detected below 0.0025 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Antimony, Total 1074 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Beryllium, Total 1075 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Thallium, Total 1085 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
Routine (10).