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 61–70 of 285 samples, newest first — collected January 22, 2018 to March 11, 2019. The summary above covers all 285.
48 results from the 10 samples listed here: 15 detected, 33 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 0.002 mg/l Minimum Reporting Level , sample collected Mar 11, 2019 13:24, sampling point MRT000 | Monochloroacetic Acid 2450 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Mar 11, 2019 13:24, sampling point MRT000 | Dichloroacetic Acid 2451 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Mar 11, 2019 13:24, sampling point MRT000 | Trichloroacetic Acid 2452 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Mar 11, 2019 13:24, sampling point MRT000 | Monobromoacetic Acid 2453 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Mar 11, 2019 13:24, sampling point MRT000 | Dibromoacetic Acid 2454 EPA method 552.2 | Not recorded |
| Not detected below 0.006 mg/l Minimum Reporting Level , sample collected Mar 11, 2019 13:24, sampling point MRT000 | Total Haloacetic Acids (Haa5) 2456 | Not recorded |
|
||
| 1.38 mg/l , sample collected Jan 22, 2019 14:00, sampling point WL001 | Nitrate-Nitrite 1038 EPA method QC10107041C | Jan 1, 2019 – Dec 31, 2019 |
| 1.38 mg/l , sample collected Jan 22, 2019 14:00, sampling point WL001 | Nitrate 1040 EPA method QC10107041C | Jan 1, 2019 – Dec 31, 2019 |
| Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 22, 2019 14:00, sampling point WL001 | Nitrite 1041 EPA method QC10107041C | Jan 1, 2019 – Dec 31, 2019 |
|
||
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 10, 2018 12:45, sampling point WL002 | Arsenic 1005 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| 0.1301 mg/l , sample collected Sep 10, 2018 12:45, sampling point WL002 | Barium 1010 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 10, 2018 12:45, sampling point WL002 | Cadmium 1015 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| 0.0034 mg/l , sample collected Sep 10, 2018 12:45, sampling point WL002 | Chromium 1020 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| 0.263 mg/l , sample collected Sep 10, 2018 12:45, sampling point WL002 | Fluoride 1025 EPA method 300.0 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 10, 2018 12:45, sampling point WL002 | Mercury 1035 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| 0.0059 mg/l , sample collected Sep 10, 2018 12:45, sampling point WL002 | Nickel 1036 EPA method 200.8 | Not recorded |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 10, 2018 12:45, sampling point WL002 | Selenium 1045 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 10, 2018 12:45, sampling point WL002 | Antimony, Total 1074 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 10, 2018 12:45, sampling point WL002 | Beryllium, Total 1075 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 10, 2018 12:45, sampling point WL002 | Thallium, Total 1085 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
|
||
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 10, 2018 12:20, sampling point WL001 | Arsenic 1005 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| 0.1106 mg/l , sample collected Sep 10, 2018 12:20, sampling point WL001 | Barium 1010 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 10, 2018 12:20, sampling point WL001 | Cadmium 1015 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| 0.0041 mg/l , sample collected Sep 10, 2018 12:20, sampling point WL001 | Chromium 1020 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| 0.26 mg/l , sample collected Sep 10, 2018 12:20, sampling point WL001 | Fluoride 1025 EPA method 300.0 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 10, 2018 12:20, sampling point WL001 | Mercury 1035 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| 0.0026 mg/l , sample collected Sep 10, 2018 12:20, sampling point WL001 | Nickel 1036 EPA method 200.8 | Not recorded |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 10, 2018 12:20, sampling point WL001 | Selenium 1045 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 10, 2018 12:20, sampling point WL001 | Antimony, Total 1074 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 10, 2018 12:20, sampling point WL001 | Beryllium, Total 1075 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 10, 2018 12:20, sampling point WL001 | Thallium, Total 1085 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
|
||
| 0.009 mg/l , sample collected Jul 17, 2018 01:45, sampling point MRT000 | Monochloroacetic Acid 2450 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 17, 2018 01:45, sampling point MRT000 | Dichloroacetic Acid 2451 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 17, 2018 01:45, sampling point MRT000 | Trichloroacetic Acid 2452 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 17, 2018 01:45, sampling point MRT000 | Monobromoacetic Acid 2453 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 17, 2018 01:45, sampling point MRT000 | Dibromoacetic Acid 2454 EPA method 552.2 | Not recorded |
| 0.009 mg/l , sample collected Jul 17, 2018 01:45, sampling point MRT000 | Total Haloacetic Acids (Haa5) 2456 | Jan 1, 2017 – Dec 31, 2019 |
|
||
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 17, 2018 01:46, sampling point MRT000 | Chloroform 2941 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 17, 2018 01:46, sampling point MRT000 | Bromoform 2942 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 17, 2018 01:46, sampling point MRT000 | Bromodichloromethane 2943 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 17, 2018 01:46, sampling point MRT000 | Dibromochloromethane 2944 EPA method 524.2 | Not recorded |
| Not detected below 4 ug/l Minimum Reporting Level , sample collected Jul 17, 2018 01:46, sampling point MRT000 | TTHM 2950 | Jan 1, 2017 – Dec 31, 2019 |
|
||
| 0.0011 mg/l , sample collected Jul 9, 2018 13:35, sampling point WL002 | Combined Uranium 4006 EPA method 200.8 | Jan 1, 2013 – Dec 31, 2021 |
|
||
| Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Apr 16, 2018 02:15, sampling point WL002 | Cyanide 1024 EPA method QC10204001X | Jan 1, 2017 – Dec 31, 2019 |
|
||
| Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Apr 16, 2018 02:01, sampling point WL001 | Cyanide 1024 EPA method QC10204001X | Jan 1, 2017 – Dec 31, 2019 |
|
||
| 1.85 mg/l , sample collected Jan 22, 2018 14:00, sampling point WL001 | Nitrate-Nitrite 1038 EPA method QC10107041C | Jan 1, 2018 – Dec 31, 2018 |
| 1.85 mg/l , sample collected Jan 22, 2018 14:00, sampling point WL001 | Nitrate 1040 EPA method QC10107041C | Jan 1, 2018 – Dec 31, 2018 |
| Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 22, 2018 14:00, sampling point WL001 | Nitrite 1041 EPA method QC10107041C | Jan 1, 2018 – Dec 31, 2018 |
-
- Collected
- Mar 11, 2019 13:24
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 190312-001HA
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Monochloroacetic Acid 2450 EPA method 552.2
- Result
- Not detected below 0.002 mg/l Minimum Reporting Level
-
Dichloroacetic Acid 2451 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
-
Trichloroacetic Acid 2452 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
-
Monobromoacetic Acid 2453 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
-
Dibromoacetic Acid 2454 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
-
Total Haloacetic Acids (Haa5) 2456
- Result
- Not detected below 0.006 mg/l Minimum Reporting Level
-
- Collected
- Jan 22, 2019 14:00
- Sampling point
- WL001 Well W001
- Sample type
- Routine
- Lab sample
- 190123-050NI
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2019 – Dec 31, 2019
-
Nitrate-Nitrite 1038 EPA method QC10107041C
- Result
- 1.38 mg/l
-
Nitrate 1040 EPA method QC10107041C
- Result
- 1.38 mg/l
-
Nitrite 1041 EPA method QC10107041C
- Result
- Not detected below 0.02 mg/l Minimum Reporting Level
-
- Collected
- Sep 10, 2018 12:45
- Sampling point
- WL002 Well W002
- Sample type
- Routine
- Lab sample
- 180911-007IN
- Laboratory
- MSDH Lab
-
Arsenic 1005 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Barium 1010 EPA method 200.8
- Result
- 0.1301 mg/l
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Cadmium 1015 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Chromium 1020 EPA method 200.8
- Result
- 0.0034 mg/l
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Fluoride 1025 EPA method 300.0
- Result
- 0.263 mg/l
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Mercury 1035 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Nickel 1036 EPA method 200.8
- Result
- 0.0059 mg/l
- Monitoring period
- Not recorded
-
Selenium 1045 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Antimony, Total 1074 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Beryllium, Total 1075 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Thallium, Total 1085 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
- Collected
- Sep 10, 2018 12:20
- Sampling point
- WL001 Well W001
- Sample type
- Routine
- Lab sample
- 180911-006IN
- Laboratory
- MSDH Lab
-
Arsenic 1005 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Barium 1010 EPA method 200.8
- Result
- 0.1106 mg/l
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Cadmium 1015 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Chromium 1020 EPA method 200.8
- Result
- 0.0041 mg/l
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Fluoride 1025 EPA method 300.0
- Result
- 0.26 mg/l
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Mercury 1035 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Nickel 1036 EPA method 200.8
- Result
- 0.0026 mg/l
- Monitoring period
- Not recorded
-
Selenium 1045 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Antimony, Total 1074 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Beryllium, Total 1075 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Thallium, Total 1085 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
- Collected
- Jul 17, 2018 01:45
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 180718-003HA
- Laboratory
- MSDH Lab
-
Monochloroacetic Acid 2450 EPA method 552.2
- Result
- 0.009 mg/l
- Monitoring period
- Not recorded
-
Dichloroacetic Acid 2451 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Trichloroacetic Acid 2452 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- 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
- 0.009 mg/l
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
- Collected
- Jul 17, 2018 01:46
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 180718-003TH
- Laboratory
- MSDH Lab
-
Chloroform 2941 EPA method 524.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- 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
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dibromochloromethane 2944 EPA method 524.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
TTHM 2950
- Result
- Not detected below 4 ug/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
- Collected
- Jul 9, 2018 13:35
- Sampling point
- WL002 Well W002
- Sample type
- Routine
- Lab sample
- 180711-001RU
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2013 – Dec 31, 2021
-
Combined Uranium 4006 EPA method 200.8
- Result
- 0.0011 mg/l
-
- Collected
- Apr 16, 2018 02:15
- Sampling point
- WL002 Well W002
- Sample type
- Routine
- Lab sample
- 180417-030CN
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Cyanide 1024 EPA method QC10204001X
- Result
- Not detected below 0.015 mg/l Minimum Reporting Level
-
- Collected
- Apr 16, 2018 02:01
- Sampling point
- WL001 Well W001
- Sample type
- Routine
- Lab sample
- 180417-020CN
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Cyanide 1024 EPA method QC10204001X
- Result
- Not detected below 0.015 mg/l Minimum Reporting Level
-
- Collected
- Jan 22, 2018 14:00
- Sampling point
- WL001 Well W001
- Sample type
- Routine
- Lab sample
- 180123-020NI
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2018 – Dec 31, 2018
-
Nitrate-Nitrite 1038 EPA method QC10107041C
- Result
- 1.85 mg/l
-
Nitrate 1040 EPA method QC10107041C
- Result
- 1.85 mg/l
-
Nitrite 1041 EPA method QC10107041C
- Result
- Not detected below 0.02 mg/l Minimum Reporting Level
Routine (10).