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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.

Every analyte ever detected for Oakland Water Works, with how many results found it and when it was first and last detected. Covers the whole record, not only 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 121–130 of 285 samples, newest first — collected September 21, 2011 to April 17, 2012. The summary above covers all 285.

46 results from the 10 samples listed here: 11 detected, 35 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.

Chemical and radiological sample results for Oakland Water Works, every result from 121 to 130 of 285 samples shown, newest first. Not detected means the amount was below the level the laboratory can reliably report, which is given beside it.
Result Analyte Monitoring period
Collected
Apr 17, 2012 13:15
Sampling point
WL001 Well W001
Sample type
Routine
Lab sample
120418-012RU
Laboratory
MSDH Lab
0.0015 mg/l , sample collected Apr 17, 2012 13:15, sampling point WL001 Combined Uranium 4006 EPA method 200.8 Apr 1, 2012 – Jun 30, 2012
Collected
Feb 6, 2012 13:20
Sampling point
WL002 Well W002
Sample type
Routine
Lab sample
120207-071
Laboratory
Radiation Safety Engineering
1.4 pci/l , sample collected Feb 6, 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 Feb 6, 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 Feb 6, 2012 13:20, sampling point WL002 Radium-226 4020 EPA method 903.1 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.48 pci/l Minimum Reporting Level , sample collected Feb 6, 2012 13:20, sampling point WL002 Radium-228 4030 EPA method 904.0 Jan 1, 2012 – Mar 31, 2012
Collected
Feb 6, 2012 13:10
Sampling point
WL001 Well W001
Sample type
Routine
Lab sample
120207-070
Laboratory
Radiation Safety Engineering
3 pci/l , sample collected Feb 6, 2012 13:10, 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 Feb 6, 2012 13:10, sampling point WL001 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.382 pci/l Minimum Reporting Level , sample collected Feb 6, 2012 13:10, sampling point WL001 Radium-226 4020 EPA method 903.1 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.4 pci/l Minimum Reporting Level , sample collected Feb 6, 2012 13:10, sampling point WL001 Radium-228 4030 EPA method 904.0 Jan 1, 2012 – Mar 31, 2012
Collected
Feb 6, 2012 13:23
Sampling point
WL002 Well W002
Sample type
Routine
Lab sample
120207-071RU
Laboratory
MSDH Lab
0.0009 mg/l , sample collected Feb 6, 2012 13:23, sampling point WL002 Combined Uranium 4006 EPA method 200.8 Jan 1, 2012 – Mar 31, 2012
Collected
Feb 6, 2012 13:13
Sampling point
WL001 Well W001
Sample type
Routine
Lab sample
120207-070RU
Laboratory
MSDH Lab
0.0015 mg/l , sample collected Feb 6, 2012 13:13, sampling point WL001 Combined Uranium 4006 EPA method 200.8 Jan 1, 2012 – Mar 31, 2012
Collected
Jan 17, 2012 01:30
Sampling point
WL001 Well W001
Sample type
Routine
Lab sample
120118-093NI
Laboratory
MSDH Lab
1.55 mg/l , sample collected Jan 17, 2012 01:30, sampling point WL001 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
1.55 mg/l , sample collected Jan 17, 2012 01:30, sampling point WL001 Nitrate 1040 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 17, 2012 01:30, sampling point WL001 Nitrite 1041 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Collected
Jan 17, 2012 01:40
Sampling point
WL002 Well W002
Sample type
Routine
Lab sample
120118-092NI
Laboratory
MSDH Lab
0.41 mg/l , sample collected Jan 17, 2012 01:40, sampling point WL002 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
0.41 mg/l , sample collected Jan 17, 2012 01:40, sampling point WL002 Nitrate 1040 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 17, 2012 01:40, sampling point WL002 Nitrite 1041 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Collected
Dec 7, 2011 12:26
Sampling point
WL002 Well W002
Sample type
Routine
Lab sample
111208-095
Laboratory
Radiation Safety Engineering
1.4 pci/l , sample collected Dec 7, 2011 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 Dec 7, 2011 12:26, sampling point WL002 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.275 pci/l Minimum Reporting Level , sample collected Dec 7, 2011 12:26, sampling point WL002 Radium-226 4020 EPA method 903.1 Oct 1, 2011 – Dec 31, 2011
Not detected below 0.48 pci/l Minimum Reporting Level , sample collected Dec 7, 2011 12:26, sampling point WL002 Radium-228 4030 EPA method 904.0 Oct 1, 2011 – Dec 31, 2011
Collected
Dec 7, 2011 12:46
Sampling point
WL001 Well W001
Sample type
Routine
Lab sample
111208-094
Laboratory
Radiation Safety Engineering
3 pci/l , sample collected Dec 7, 2011 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 Dec 7, 2011 12:46, sampling point WL001 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.382 pci/l Minimum Reporting Level , sample collected Dec 7, 2011 12:46, sampling point WL001 Radium-226 4020 EPA method 903.1 Oct 1, 2011 – Dec 31, 2011
Not detected below 0.4 pci/l Minimum Reporting Level , sample collected Dec 7, 2011 12:46, sampling point WL001 Radium-228 4030 EPA method 904.0 Oct 1, 2011 – Dec 31, 2011
Collected
Sep 21, 2011 01:59
Sampling point
WL002 Well W002
Sample type
Routine
Lab sample
110922-006VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 21, 2011 01:59, sampling point WL002 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 21, 2011 01:59, sampling point WL002 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 21, 2011 01:59, sampling point WL002 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 21, 2011 01:59, sampling point WL002 Dichloromethane 2964 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 21, 2011 01:59, sampling point WL002 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 21, 2011 01:59, sampling point WL002 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 21, 2011 01:59, sampling point WL002 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 21, 2011 01:59, sampling point WL002 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 21, 2011 01:59, sampling point WL002 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 21, 2011 01:59, sampling point WL002 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 21, 2011 01:59, sampling point WL002 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 21, 2011 01:59, sampling point WL002 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 21, 2011 01:59, sampling point WL002 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 21, 2011 01:59, sampling point WL002 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 21, 2011 01:59, sampling point WL002 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 21, 2011 01:59, sampling point WL002 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 21, 2011 01:59, sampling point WL002 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 21, 2011 01:59, sampling point WL002 Benzene 2990 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 21, 2011 01:59, sampling point WL002 Toluene 2991 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 21, 2011 01:59, sampling point WL002 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 21, 2011 01:59, sampling point WL002 Styrene 2996 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016

Routine (10).