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 111–120 of 285 samples, newest first — collected April 17, 2012 to October 29, 2012. The summary above covers all 285.
28 results from the 10 samples listed here: 10 detected, 18 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 |
|---|---|---|
|
||
| 0.0014 mg/l , sample collected Oct 29, 2012 13:30, sampling point WL001 | Combined Uranium 4006 EPA method 200.8 | Not recorded |
|
||
| 1.4 pci/l , sample collected Jul 11, 2012 12:26, sampling point WL002 | Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 | Not recorded |
| Not detected below 0.48 pci/l Minimum Reporting Level , sample collected Jul 11, 2012 12:26, sampling point WL002 | Combined Radium (-226 & -228) 4010 | Not recorded |
| Not detected below 0.275 pci/l Minimum Reporting Level , sample collected Jul 11, 2012 12:26, sampling point WL002 | Radium-226 4020 EPA method 903.1 | Jul 1, 2012 – Sep 30, 2012 |
| Not detected below 0.48 pci/l Minimum Reporting Level , sample collected Jul 11, 2012 12:26, sampling point WL002 | Radium-228 4030 EPA method 904.0 | Jul 1, 2012 – Sep 30, 2012 |
|
||
| 3 pci/l , sample collected Jul 11, 2012 12:46, sampling point WL001 | Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 | Not recorded |
| Not detected below 0.4 pci/l Minimum Reporting Level , sample collected Jul 11, 2012 12:46, sampling point WL001 | Combined Radium (-226 & -228) 4010 | Not recorded |
| Not detected below 0.382 pci/l Minimum Reporting Level , sample collected Jul 11, 2012 12:46, sampling point WL001 | Radium-226 4020 EPA method 903.1 | Jul 1, 2012 – Sep 30, 2012 |
| Not detected below 0.4 pci/l Minimum Reporting Level , sample collected Jul 11, 2012 12:46, sampling point WL001 | Radium-228 4030 EPA method 904.0 | Jul 1, 2012 – Sep 30, 2012 |
|
||
| 1.4 pci/l , sample collected Jul 10, 2012 13:36, sampling point WL002 | Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 | Not recorded |
| Not detected below 0.48 pci/l Minimum Reporting Level , sample collected Jul 10, 2012 13:36, sampling point WL002 | Combined Radium (-226 & -228) 4010 | Not recorded |
| Not detected below 0.275 pci/l Minimum Reporting Level , sample collected Jul 10, 2012 13:36, sampling point WL002 | Radium-226 4020 EPA method 903.1 | Jul 1, 2012 – Sep 30, 2012 |
| Not detected below 0.48 pci/l Minimum Reporting Level , sample collected Jul 10, 2012 13:36, sampling point WL002 | Radium-228 4030 EPA method 904.0 | Jul 1, 2012 – Sep 30, 2012 |
|
||
| 3 pci/l , sample collected Jul 10, 2012 13:20, sampling point WL001 | Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 | Not recorded |
| Not detected below 0.4 pci/l Minimum Reporting Level , sample collected Jul 10, 2012 13:20, sampling point WL001 | Combined Radium (-226 & -228) 4010 | Not recorded |
| Not detected below 0.382 pci/l Minimum Reporting Level , sample collected Jul 10, 2012 13:20, sampling point WL001 | Radium-226 4020 EPA method 903.1 | Jul 1, 2012 – Sep 30, 2012 |
| Not detected below 0.4 pci/l Minimum Reporting Level , sample collected Jul 10, 2012 13:20, sampling point WL001 | Radium-228 4030 EPA method 904.0 | Jul 1, 2012 – Sep 30, 2012 |
|
||
| 0.0007 mg/l , sample collected Jul 10, 2012 13:36, sampling point WL002 | Combined Uranium 4006 EPA method 200.8 | Jul 1, 2012 – Sep 30, 2012 |
|
||
| 0.001 mg/l , sample collected Jul 10, 2012 13:20, sampling point WL001 | Combined Uranium 4006 EPA method 200.8 | Jul 1, 2012 – Sep 30, 2012 |
|
||
| 1.4 pci/l , sample collected Apr 17, 2012 13:20, sampling point WL002 | Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 | Not recorded |
| Not detected below 0.48 pci/l Minimum Reporting Level , sample collected Apr 17, 2012 13:20, sampling point WL002 | Combined Radium (-226 & -228) 4010 | Not recorded |
| Not detected below 0.275 pci/l Minimum Reporting Level , sample collected Apr 17, 2012 13:20, sampling point WL002 | Radium-226 4020 EPA method 903.1 | Apr 1, 2012 – Jun 30, 2012 |
| Not detected below 0.48 pci/l Minimum Reporting Level , sample collected Apr 17, 2012 13:20, sampling point WL002 | Radium-228 4030 EPA method 904.0 | Apr 1, 2012 – Jun 30, 2012 |
|
||
| 3 pci/l , sample collected Apr 17, 2012 13:12, sampling point WL001 | Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 | Not recorded |
| Not detected below 0.4 pci/l Minimum Reporting Level , sample collected Apr 17, 2012 13:12, sampling point WL001 | Combined Radium (-226 & -228) 4010 | Not recorded |
| Not detected below 0.382 pci/l Minimum Reporting Level , sample collected Apr 17, 2012 13:12, sampling point WL001 | Radium-226 4020 EPA method 903.1 | Apr 1, 2012 – Jun 30, 2012 |
| Not detected below 0.4 pci/l Minimum Reporting Level , sample collected Apr 17, 2012 13:12, sampling point WL001 | Radium-228 4030 EPA method 904.0 | Apr 1, 2012 – Jun 30, 2012 |
|
||
| 0.0009 mg/l , sample collected Apr 17, 2012 13:23, sampling point WL002 | Combined Uranium 4006 EPA method 200.8 | Apr 1, 2012 – Jun 30, 2012 |
-
- Collected
- Oct 29, 2012 13:30
- Sampling point
- WL001 Well W001
- Sample type
- Routine
- Lab sample
- 121029-002RU
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Combined Uranium 4006 EPA method 200.8
- Result
- 0.0014 mg/l
-
- Collected
- Jul 11, 2012 12:26
- Sampling point
- WL002 Well W002
- Sample type
- Routine
- Lab sample
- 201211290079
- Laboratory
- Radiation Safety Engineering
-
Gross Alpha, Incl. Radon & U 4002 EPA method 00-02
- Result
- 1.4 pci/l
- Monitoring period
- Not recorded
-
Combined Radium (-226 & -228) 4010
- Result
- Not detected below 0.48 pci/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Radium-226 4020 EPA method 903.1
- Result
- Not detected below 0.275 pci/l Minimum Reporting Level
- Monitoring period
- Jul 1, 2012 – Sep 30, 2012
-
Radium-228 4030 EPA method 904.0
- Result
- Not detected below 0.48 pci/l Minimum Reporting Level
- Monitoring period
- Jul 1, 2012 – Sep 30, 2012
-
- Collected
- Jul 11, 2012 12:46
- Sampling point
- WL001 Well W001
- Sample type
- Routine
- Lab sample
- 201211290078
- Laboratory
- Radiation Safety Engineering
-
Gross Alpha, Incl. Radon & U 4002 EPA method 00-02
- Result
- 3 pci/l
- Monitoring period
- Not recorded
-
Combined Radium (-226 & -228) 4010
- Result
- Not detected below 0.4 pci/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Radium-226 4020 EPA method 903.1
- Result
- Not detected below 0.382 pci/l Minimum Reporting Level
- Monitoring period
- Jul 1, 2012 – Sep 30, 2012
-
Radium-228 4030 EPA method 904.0
- Result
- Not detected below 0.4 pci/l Minimum Reporting Level
- Monitoring period
- Jul 1, 2012 – Sep 30, 2012
-
- Collected
- Jul 10, 2012 13:36
- Sampling point
- WL002 Well W002
- Sample type
- Routine
- Lab sample
- 120711-006
- Laboratory
- Radiation Safety Engineering
-
Gross Alpha, Incl. Radon & U 4002 EPA method 00-02
- Result
- 1.4 pci/l
- Monitoring period
- Not recorded
-
Combined Radium (-226 & -228) 4010
- Result
- Not detected below 0.48 pci/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Radium-226 4020 EPA method 903.1
- Result
- Not detected below 0.275 pci/l Minimum Reporting Level
- Monitoring period
- Jul 1, 2012 – Sep 30, 2012
-
Radium-228 4030 EPA method 904.0
- Result
- Not detected below 0.48 pci/l Minimum Reporting Level
- Monitoring period
- Jul 1, 2012 – Sep 30, 2012
-
- Collected
- Jul 10, 2012 13:20
- Sampling point
- WL001 Well W001
- Sample type
- Routine
- Lab sample
- 120711-005
- Laboratory
- Radiation Safety Engineering
-
Gross Alpha, Incl. Radon & U 4002 EPA method 00-02
- Result
- 3 pci/l
- Monitoring period
- Not recorded
-
Combined Radium (-226 & -228) 4010
- Result
- Not detected below 0.4 pci/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Radium-226 4020 EPA method 903.1
- Result
- Not detected below 0.382 pci/l Minimum Reporting Level
- Monitoring period
- Jul 1, 2012 – Sep 30, 2012
-
Radium-228 4030 EPA method 904.0
- Result
- Not detected below 0.4 pci/l Minimum Reporting Level
- Monitoring period
- Jul 1, 2012 – Sep 30, 2012
-
- Collected
- Jul 10, 2012 13:36
- Sampling point
- WL002 Well W002
- Sample type
- Routine
- Lab sample
- 120711-006RU
- Laboratory
- MSDH Lab
- Monitoring period
- Jul 1, 2012 – Sep 30, 2012
-
Combined Uranium 4006 EPA method 200.8
- Result
- 0.0007 mg/l
-
- Collected
- Jul 10, 2012 13:20
- Sampling point
- WL001 Well W001
- Sample type
- Routine
- Lab sample
- 120711-005RU
- Laboratory
- MSDH Lab
- Monitoring period
- Jul 1, 2012 – Sep 30, 2012
-
Combined Uranium 4006 EPA method 200.8
- Result
- 0.001 mg/l
-
- Collected
- Apr 17, 2012 13:20
- Sampling point
- WL002 Well W002
- Sample type
- Routine
- Lab sample
- 120418-013
- Laboratory
- Radiation Safety Engineering
-
Gross Alpha, Incl. Radon & U 4002 EPA method 00-02
- Result
- 1.4 pci/l
- Monitoring period
- Not recorded
-
Combined Radium (-226 & -228) 4010
- Result
- Not detected below 0.48 pci/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Radium-226 4020 EPA method 903.1
- Result
- Not detected below 0.275 pci/l Minimum Reporting Level
- Monitoring period
- Apr 1, 2012 – Jun 30, 2012
-
Radium-228 4030 EPA method 904.0
- Result
- Not detected below 0.48 pci/l Minimum Reporting Level
- Monitoring period
- Apr 1, 2012 – Jun 30, 2012
-
- Collected
- Apr 17, 2012 13:12
- Sampling point
- WL001 Well W001
- Sample type
- Routine
- Lab sample
- 120418-012
- Laboratory
- Radiation Safety Engineering
-
Gross Alpha, Incl. Radon & U 4002 EPA method 00-02
- Result
- 3 pci/l
- Monitoring period
- Not recorded
-
Combined Radium (-226 & -228) 4010
- Result
- Not detected below 0.4 pci/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Radium-226 4020 EPA method 903.1
- Result
- Not detected below 0.382 pci/l Minimum Reporting Level
- Monitoring period
- Apr 1, 2012 – Jun 30, 2012
-
Radium-228 4030 EPA method 904.0
- Result
- Not detected below 0.4 pci/l Minimum Reporting Level
- Monitoring period
- Apr 1, 2012 – Jun 30, 2012
-
- Collected
- Apr 17, 2012 13:23
- Sampling point
- WL002 Well W002
- Sample type
- Routine
- Lab sample
- 120418-013RU
- Laboratory
- MSDH Lab
- Monitoring period
- Apr 1, 2012 – Jun 30, 2012
-
Combined Uranium 4006 EPA method 200.8
- Result
- 0.0009 mg/l
Routine (10).