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
MS0010007 , Oakland Water Works
25 of the 56 analytes this system has been tested for have been detected at least once, across 285 samples on record.
The other 31 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 285 samples on record, detections range from August 24, 1993 to July 27, 2026. 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 |
|---|---|---|---|---|
| Copper, Free 1022 | Inorganic Chemical | 147 of 155 results | Aug 24, 1993 | Sep 11, 2025 |
| Lead 1030 | Inorganic Chemical | 130 of 155 results | Aug 24, 1993 | Aug 13, 2025 |
| Nitrate-Nitrite 1038 | Inorganic Chemical | 29 of 29 results | May 5, 2004 | Jan 22, 2019 |
| Nitrate 1040 | Inorganic Chemical | 29 of 29 results | May 5, 2004 | Jan 22, 2019 |
| TTHM 2950 | Organic Chemical | 20 of 24 results | Jun 25, 2007 | Jul 23, 2025 |
| Total Haloacetic Acids (Haa5) 2456 | Organic Chemical | 17 of 22 results | Jun 25, 2007 | Jul 27, 2026 |
| Barium 1010 | Inorganic Chemical | 15 of 15 results | Jan 15, 2002 | Apr 6, 2020 |
| Fluoride 1025 | Inorganic Chemical | 15 of 15 results | Jan 15, 2002 | Apr 6, 2020 |
| Chromium 1020 | Inorganic Chemical | 14 of 15 results | Jan 15, 2002 | Sep 10, 2018 |
| Nickel 1036 | Inorganic Chemical | 14 of 15 results | Jan 15, 2002 | Sep 10, 2018 |
| Chloroform 2941 | Organic Chemical | 12 of 15 results | Jun 25, 2007 | Jul 23, 2025 |
| Bromodichloromethane 2943 | Organic Chemical | 11 of 15 results | Jul 14, 2008 | Jul 23, 2025 |
| Dibromochloromethane 2944 | Organic Chemical | 11 of 15 results | Jul 14, 2008 | Jul 23, 2025 |
| Gross Alpha, Incl. Radon & U 4002 | Radionuclide | 11 of 11 results | Dec 7, 2011 | Mar 15, 2016 |
| Combined Uranium 4006 | Radionuclide | 9 of 10 results | Feb 6, 2012 | Jul 9, 2018 |
| Dichloroacetic Acid 2451 | Organic Chemical | 8 of 12 results | Jul 14, 2008 | Jul 27, 2026 |
| Trichloroacetic Acid 2452 | Organic Chemical | 8 of 12 results | Jul 14, 2008 | Jul 27, 2026 |
| Selenium 1045 | Inorganic Chemical | 7 of 15 results | Jan 12, 2004 | Mar 10, 2008 |
| Monochloroacetic Acid 2450 | Organic Chemical | 3 of 12 results | Sep 14, 2011 | Jul 13, 2020 |
| Arsenic 1005 | Inorganic Chemical | 3 of 15 results | Dec 12, 2005 | May 5, 2014 |
| Cadmium 1015 | Inorganic Chemical | 3 of 15 results | Jan 12, 2004 | May 5, 2014 |
| Uranium-238 4009 | Radionuclide | 3 of 3 results | Dec 12, 2005 | Jan 18, 2006 |
| Sulfate 1055 | Inorganic Chemical | 2 of 2 results | Jan 15, 2002 | Jan 12, 2004 |
| Monobromoacetic Acid 2453 | Organic Chemical | 1 of 12 results | Jul 13, 2020 | Jul 13, 2020 |
| Cyanide 1024 | Inorganic Chemical | 1 of 14 results | Jan 18, 2006 | Jan 18, 2006 |
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 181–190 of 285 samples, newest first — collected January 10, 2005 to June 5, 2006. The summary above covers all 285.
49 results from the 10 samples listed here: 27 detected, 22 not detected. Across the whole record it is 523 of 969. 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 |
|---|---|---|
|
||
| 0.65 mg/l , sample collected Jun 5, 2006, sampling point WL002 | Nitrate-Nitrite 1038 EPA method 353.2 | Jan 1, 2006 – Dec 31, 2006 |
| 0.65 mg/l , sample collected Jun 5, 2006, sampling point WL002 | Nitrate 1040 EPA method 353.2 | Jan 1, 2006 – Dec 31, 2006 |
| Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jun 5, 2006, sampling point WL002 | Nitrite 1041 EPA method 353.2 | Jan 1, 2006 – Dec 31, 2006 |
|
||
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 18, 2006, sampling point WL002 | Arsenic 1005 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| 0.110673 mg/l , sample collected Jan 18, 2006, sampling point WL002 | Barium 1010 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0001 mg/l Minimum Reporting Level , sample collected Jan 18, 2006, sampling point WL002 | Cadmium 1015 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| 0.002387 mg/l , sample collected Jan 18, 2006, sampling point WL002 | Chromium 1020 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| 0.288852 mg/l , sample collected Jan 18, 2006, sampling point WL002 | Fluoride 1025 EPA method 380-75WE | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0002 mg/l Minimum Reporting Level , sample collected Jan 18, 2006, sampling point WL002 | Mercury 1035 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| 0.003215 mg/l , sample collected Jan 18, 2006, sampling point WL002 | Nickel 1036 EPA method 200.8 | Not recorded |
| 0.001173 mg/l , sample collected Jan 18, 2006, sampling point WL002 | Selenium 1045 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 18, 2006, sampling point WL002 | Antimony, Total 1074 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0001 mg/l Minimum Reporting Level , sample collected Jan 18, 2006, sampling point WL002 | Beryllium, Total 1075 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 18, 2006, sampling point WL002 | Thallium, Total 1085 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| 0.001011 mg/l , sample collected Jan 18, 2006, sampling point WL002 | Uranium-238 4009 | Not recorded |
|
||
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 18, 2006, sampling point WL001 | Arsenic 1005 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| 0.101496 mg/l , sample collected Jan 18, 2006, sampling point WL001 | Barium 1010 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0001 mg/l Minimum Reporting Level , sample collected Jan 18, 2006, sampling point WL001 | Cadmium 1015 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| 0.00375 mg/l , sample collected Jan 18, 2006, sampling point WL001 | Chromium 1020 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| 0.34399 mg/l , sample collected Jan 18, 2006, sampling point WL001 | Fluoride 1025 EPA method 380-75WE | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0002 mg/l Minimum Reporting Level , sample collected Jan 18, 2006, sampling point WL001 | Mercury 1035 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| 0.002924 mg/l , sample collected Jan 18, 2006, sampling point WL001 | Nickel 1036 EPA method 200.8 | Not recorded |
| 0.001133 mg/l , sample collected Jan 18, 2006, sampling point WL001 | Selenium 1045 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 18, 2006, sampling point WL001 | Antimony, Total 1074 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0001 mg/l Minimum Reporting Level , sample collected Jan 18, 2006, sampling point WL001 | Beryllium, Total 1075 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 18, 2006, sampling point WL001 | Thallium, Total 1085 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| 0.001461 mg/l , sample collected Jan 18, 2006, sampling point WL001 | Uranium-238 4009 | Not recorded |
|
||
| 0.00545 mg/l , sample collected Jan 18, 2006, sampling point WL001 | Cyanide 1024 EPA method QC10204001X | Jan 1, 2005 – Dec 31, 2007 |
|
||
| Not detected below 0.005 mg/l Minimum Reporting Level , sample collected Jan 18, 2006, sampling point WL002 | Cyanide 1024 EPA method QC10204001X | Jan 1, 2005 – Dec 31, 2007 |
|
||
| 0.002403 mg/l , sample collected Dec 12, 2005, sampling point WL002 | Arsenic 1005 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| 0.133561 mg/l , sample collected Dec 12, 2005, sampling point WL002 | Barium 1010 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| 0.000693 mg/l , sample collected Dec 12, 2005, sampling point WL002 | Cadmium 1015 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| 0.003932 mg/l , sample collected Dec 12, 2005, sampling point WL002 | Chromium 1020 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| 0.280455 mg/l , sample collected Dec 12, 2005, sampling point WL002 | Fluoride 1025 EPA method 380-75WE | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0002 mg/l Minimum Reporting Level , sample collected Dec 12, 2005, sampling point WL002 | Mercury 1035 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| 0.005325 mg/l , sample collected Dec 12, 2005, sampling point WL002 | Nickel 1036 EPA method 200.8 | Not recorded |
| 0.003115 mg/l , sample collected Dec 12, 2005, sampling point WL002 | Selenium 1045 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Dec 12, 2005, sampling point WL002 | Antimony, Total 1074 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0001 mg/l Minimum Reporting Level , sample collected Dec 12, 2005, sampling point WL002 | Beryllium, Total 1075 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Dec 12, 2005, sampling point WL002 | Thallium, Total 1085 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| 0.000817 mg/l , sample collected Dec 12, 2005, sampling point WL002 | Uranium-238 4009 | Not recorded |
|
||
| Not detected below 0.005 mg/l Minimum Reporting Level , sample collected Dec 12, 2005, sampling point WL002 | Cyanide 1024 EPA method QC10204001X | Jan 1, 2005 – Dec 31, 2007 |
|
||
| 1.51 mg/l , sample collected Jul 18, 2005, sampling point WL001 | Nitrate-Nitrite 1038 EPA method 353.2 | Jan 1, 2005 – Dec 31, 2005 |
| 1.51 mg/l , sample collected Jul 18, 2005, sampling point WL001 | Nitrate 1040 EPA method 353.2 | Jan 1, 2005 – Dec 31, 2005 |
| Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jul 18, 2005, sampling point WL001 | Nitrite 1041 EPA method 353.2 | Jan 1, 2005 – Dec 31, 2005 |
|
||
| 0.64 mg/l , sample collected Jul 18, 2005, sampling point WL002 | Nitrate-Nitrite 1038 EPA method 353.2 | Jan 1, 2005 – Dec 31, 2005 |
| 0.63 mg/l , sample collected Jul 18, 2005, sampling point WL002 | Nitrate 1040 EPA method 353.2 | Jan 1, 2005 – Dec 31, 2005 |
| Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jul 18, 2005, sampling point WL002 | Nitrite 1041 EPA method 353.2 | Jan 1, 2005 – Dec 31, 2005 |
|
||
| Not detected below 0.005 mg/l Minimum Reporting Level , sample collected Jan 10, 2005, sampling point WL001 | Cyanide 1024 EPA method QC10204001X | Jan 1, 2005 – Dec 31, 2007 |
-
- Collected
- Jun 5, 2006
- Sampling point
- WL002 Well W002
- Sample type
- Routine
- Lab sample
- 060606-025NI
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2006 – Dec 31, 2006
-
Nitrate-Nitrite 1038 EPA method 353.2
- Result
- 0.65 mg/l
-
Nitrate 1040 EPA method 353.2
- Result
- 0.65 mg/l
-
Nitrite 1041 EPA method 353.2
- Result
- Not detected below 0.02 mg/l Minimum Reporting Level
-
- Collected
- Jan 18, 2006
- Sampling point
- WL002 Well W002
- Sample type
- Routine
- Lab sample
- 060119-064IN
- Laboratory
- MSDH Lab
-
Arsenic 1005 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Barium 1010 EPA method 200.8
- Result
- 0.110673 mg/l
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Cadmium 1015 EPA method 200.8
- Result
- Not detected below 0.0001 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Chromium 1020 EPA method 200.8
- Result
- 0.002387 mg/l
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Fluoride 1025 EPA method 380-75WE
- Result
- 0.288852 mg/l
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Mercury 1035 EPA method 200.8
- Result
- Not detected below 0.0002 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Nickel 1036 EPA method 200.8
- Result
- 0.003215 mg/l
- Monitoring period
- Not recorded
-
Selenium 1045 EPA method 200.8
- Result
- 0.001173 mg/l
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Antimony, Total 1074 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Beryllium, Total 1075 EPA method 200.8
- Result
- Not detected below 0.0001 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Thallium, Total 1085 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Uranium-238 4009
- Result
- 0.001011 mg/l
- Monitoring period
- Not recorded
-
- Collected
- Jan 18, 2006
- Sampling point
- WL001 Well W001
- Sample type
- Routine
- Lab sample
- 060119-065IN
- Laboratory
- MSDH Lab
-
Arsenic 1005 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Barium 1010 EPA method 200.8
- Result
- 0.101496 mg/l
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Cadmium 1015 EPA method 200.8
- Result
- Not detected below 0.0001 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Chromium 1020 EPA method 200.8
- Result
- 0.00375 mg/l
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Fluoride 1025 EPA method 380-75WE
- Result
- 0.34399 mg/l
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Mercury 1035 EPA method 200.8
- Result
- Not detected below 0.0002 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Nickel 1036 EPA method 200.8
- Result
- 0.002924 mg/l
- Monitoring period
- Not recorded
-
Selenium 1045 EPA method 200.8
- Result
- 0.001133 mg/l
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Antimony, Total 1074 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Beryllium, Total 1075 EPA method 200.8
- Result
- Not detected below 0.0001 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Thallium, Total 1085 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Uranium-238 4009
- Result
- 0.001461 mg/l
- Monitoring period
- Not recorded
-
- Collected
- Jan 18, 2006
- Sampling point
- WL001 Well W001
- Sample type
- Routine
- Lab sample
- 060119-054CN
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Cyanide 1024 EPA method QC10204001X
- Result
- 0.00545 mg/l
-
- Collected
- Jan 18, 2006
- Sampling point
- WL002 Well W002
- Sample type
- Routine
- Lab sample
- 060119-051CN
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Cyanide 1024 EPA method QC10204001X
- Result
- Not detected below 0.005 mg/l Minimum Reporting Level
-
- Collected
- Dec 12, 2005
- Sampling point
- WL002 Well W002
- Sample type
- Routine
- Lab sample
- 051213-004IN
- Laboratory
- MSDH Lab
-
Arsenic 1005 EPA method 200.8
- Result
- 0.002403 mg/l
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Barium 1010 EPA method 200.8
- Result
- 0.133561 mg/l
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Cadmium 1015 EPA method 200.8
- Result
- 0.000693 mg/l
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Chromium 1020 EPA method 200.8
- Result
- 0.003932 mg/l
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Fluoride 1025 EPA method 380-75WE
- Result
- 0.280455 mg/l
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Mercury 1035 EPA method 200.8
- Result
- Not detected below 0.0002 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Nickel 1036 EPA method 200.8
- Result
- 0.005325 mg/l
- Monitoring period
- Not recorded
-
Selenium 1045 EPA method 200.8
- Result
- 0.003115 mg/l
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Antimony, Total 1074 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Beryllium, Total 1075 EPA method 200.8
- Result
- Not detected below 0.0001 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Thallium, Total 1085 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Uranium-238 4009
- Result
- 0.000817 mg/l
- Monitoring period
- Not recorded
-
- Collected
- Dec 12, 2005
- Sampling point
- WL002 Well W002
- Sample type
- Routine
- Lab sample
- 051213-023CN
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Cyanide 1024 EPA method QC10204001X
- Result
- Not detected below 0.005 mg/l Minimum Reporting Level
-
- Collected
- Jul 18, 2005
- Sampling point
- WL001 Well W001
- Sample type
- Routine
- Lab sample
- 050719-114NI
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2005 – Dec 31, 2005
-
Nitrate-Nitrite 1038 EPA method 353.2
- Result
- 1.51 mg/l
-
Nitrate 1040 EPA method 353.2
- Result
- 1.51 mg/l
-
Nitrite 1041 EPA method 353.2
- Result
- Not detected below 0.02 mg/l Minimum Reporting Level
-
- Collected
- Jul 18, 2005
- Sampling point
- WL002 Well W002
- Sample type
- Routine
- Lab sample
- 050719-115NI
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2005 – Dec 31, 2005
-
Nitrate-Nitrite 1038 EPA method 353.2
- Result
- 0.64 mg/l
-
Nitrate 1040 EPA method 353.2
- Result
- 0.63 mg/l
-
Nitrite 1041 EPA method 353.2
- Result
- Not detected below 0.02 mg/l Minimum Reporting Level
-
- Collected
- Jan 10, 2005
- Sampling point
- WL001 Well W001
- Sample type
- Routine
- Lab sample
- 050111-040CN
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Cyanide 1024 EPA method QC10204001X
- Result
- Not detected below 0.005 mg/l Minimum Reporting Level
Routine (10).