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 201–210 of 285 samples, newest first — collected September 20, 2000 to January 15, 2002. The summary above covers all 285.
29 results from the 10 samples listed here: 19 detected, 10 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 |
|---|---|---|
|
||
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jan 15, 2002, sampling point WL001 | Arsenic 1005 EPA method 200.8 | Jan 1, 2002 – Dec 31, 2004 |
| 0.096 mg/l , sample collected Jan 15, 2002, sampling point WL001 | Barium 1010 EPA method 200.8 | Jan 1, 2002 – Dec 31, 2004 |
| Not detected below 0.0001 mg/l Minimum Reporting Level , sample collected Jan 15, 2002, sampling point WL001 | Cadmium 1015 EPA method 200.8 | Jan 1, 2002 – Dec 31, 2004 |
| 0.004 mg/l , sample collected Jan 15, 2002, sampling point WL001 | Chromium 1020 EPA method 200.8 | Jan 1, 2002 – Dec 31, 2004 |
| 0.205 mg/l , sample collected Jan 15, 2002, sampling point WL001 | Fluoride 1025 EPA method 300.0 | Jan 1, 2002 – Dec 31, 2004 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 15, 2002, sampling point WL001 | Mercury 1035 EPA method 200.8 | Jan 1, 2002 – Dec 31, 2004 |
| 0.001 mg/l , sample collected Jan 15, 2002, sampling point WL001 | Nickel 1036 EPA method 200.8 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jan 15, 2002, sampling point WL001 | Selenium 1045 EPA method 200.8 | Jan 1, 2002 – Dec 31, 2004 |
| 7.29 mg/l , sample collected Jan 15, 2002, sampling point WL001 | Sulfate 1055 EPA method 300.0 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jan 15, 2002, sampling point WL001 | Antimony, Total 1074 EPA method 200.8 | Jan 1, 2002 – Dec 31, 2004 |
| Not detected below 0.0003 mg/l Minimum Reporting Level , sample collected Jan 15, 2002, sampling point WL001 | Beryllium, Total 1075 EPA method 200.8 | Jan 1, 2002 – Dec 31, 2004 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 15, 2002, sampling point WL001 | Thallium, Total 1085 EPA method 200.8 | Jan 1, 2002 – Dec 31, 2004 |
|
||
| Not detected below 0.01 mg/l Minimum Reporting Level , sample collected Jan 8, 2002, sampling point WL001 | Cyanide 1024 EPA method 335.4 | Jan 1, 2002 – Dec 31, 2004 |
|
||
| 0.143 mg/l , sample collected Sep 20, 2000, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.002 mg/l , sample collected Sep 20, 2000, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.04 mg/l , sample collected Sep 20, 2000, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.001 mg/l , sample collected Sep 20, 2000, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.095 mg/l , sample collected Sep 20, 2000, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.013 mg/l , sample collected Sep 20, 2000, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.006 mg/l , sample collected Sep 20, 2000, sampling point DS000 | Copper, Free 1022 | Not recorded |
| Not detected below 0.001 mg/l Method Detection Limit , sample collected Sep 20, 2000, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.16 mg/l , sample collected Sep 20, 2000, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.014 mg/l , sample collected Sep 20, 2000, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.005 mg/l , sample collected Sep 20, 2000, sampling point DS000 | Copper, Free 1022 | Not recorded |
| Not detected below 0.001 mg/l Method Detection Limit , sample collected Sep 20, 2000, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.382 mg/l , sample collected Sep 20, 2000, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.001 mg/l , sample collected Sep 20, 2000, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.017 mg/l , sample collected Sep 20, 2000, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.024 mg/l , sample collected Sep 20, 2000, sampling point DS000 | Lead 1030 | Not recorded |
-
- Collected
- Jan 15, 2002
- Sampling point
- WL001 Well W001
- Sample type
- Routine
- Lab sample
- 020116-022IN
- Laboratory
- MSDH Lab
-
Arsenic 1005 EPA method 200.8
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2002 – Dec 31, 2004
-
Barium 1010 EPA method 200.8
- Result
- 0.096 mg/l
- Monitoring period
- Jan 1, 2002 – Dec 31, 2004
-
Cadmium 1015 EPA method 200.8
- Result
- Not detected below 0.0001 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2002 – Dec 31, 2004
-
Chromium 1020 EPA method 200.8
- Result
- 0.004 mg/l
- Monitoring period
- Jan 1, 2002 – Dec 31, 2004
-
Fluoride 1025 EPA method 300.0
- Result
- 0.205 mg/l
- Monitoring period
- Jan 1, 2002 – Dec 31, 2004
-
Mercury 1035 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2002 – Dec 31, 2004
-
Nickel 1036 EPA method 200.8
- Result
- 0.001 mg/l
- Monitoring period
- Not recorded
-
Selenium 1045 EPA method 200.8
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2002 – Dec 31, 2004
-
Sulfate 1055 EPA method 300.0
- Result
- 7.29 mg/l
- Monitoring period
- Not recorded
-
Antimony, Total 1074 EPA method 200.8
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2002 – Dec 31, 2004
-
Beryllium, Total 1075 EPA method 200.8
- Result
- Not detected below 0.0003 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2002 – Dec 31, 2004
-
Thallium, Total 1085 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2002 – Dec 31, 2004
-
- Collected
- Jan 8, 2002
- Sampling point
- WL001 Well W001
- Sample type
- Routine
- Lab sample
- 020109-009CN
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2002 – Dec 31, 2004
-
Cyanide 1024 EPA method 335.4
- Result
- Not detected below 0.01 mg/l Minimum Reporting Level
-
- Collected
- Sep 20, 2000
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 000922-066L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.143 mg/l
-
Lead 1030
- Result
- 0.002 mg/l
-
- Collected
- Sep 20, 2000
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 000922-065L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.04 mg/l
-
Lead 1030
- Result
- 0.001 mg/l
-
- Collected
- Sep 20, 2000
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 000922-064L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.095 mg/l
-
Lead 1030
- Result
- 0.013 mg/l
-
- Collected
- Sep 20, 2000
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 000922-063L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.006 mg/l
-
Lead 1030
- Result
- Not detected below 0.001 mg/l Method Detection Limit
-
- Collected
- Sep 20, 2000
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 000922-062L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.16 mg/l
-
Lead 1030
- Result
- 0.014 mg/l
-
- Collected
- Sep 20, 2000
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 000922-061L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.005 mg/l
-
Lead 1030
- Result
- Not detected below 0.001 mg/l Method Detection Limit
-
- Collected
- Sep 20, 2000
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 000922-060L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.382 mg/l
-
Lead 1030
- Result
- 0.001 mg/l
-
- Collected
- Sep 20, 2000
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 000922-059L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.017 mg/l
-
Lead 1030
- Result
- 0.024 mg/l
Routine (10).