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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 131–140 of 285 samples, newest first — collected June 21, 2011 to September 21, 2011. The summary above covers all 285.

46 results from the 10 samples listed here: 21 detected, 25 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 131 to 140 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
Sep 21, 2011 01:44
Sampling point
WL001 Well W001
Sample type
Routine
Lab sample
110922-005VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 21, 2011 01:44, sampling point WL001 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 01:44, sampling point WL001 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 01:44, sampling point WL001 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 01:44, sampling point WL001 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 01:44, sampling point WL001 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 01:44, sampling point WL001 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 01:44, sampling point WL001 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 01:44, sampling point WL001 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 01:44, sampling point WL001 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 01:44, sampling point WL001 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 01:44, sampling point WL001 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 01:44, sampling point WL001 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 01:44, sampling point WL001 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 01:44, sampling point WL001 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 01:44, sampling point WL001 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 01:44, sampling point WL001 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 01:44, sampling point WL001 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 01:44, sampling point WL001 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 01:44, sampling point WL001 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 01:44, sampling point WL001 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 01:44, sampling point WL001 Styrene 2996 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Collected
Sep 14, 2011 02:26
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
110915-004TH
Laboratory
MSDH Lab
26.7 ug/l , sample collected Sep 14, 2011 02:26, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 14, 2011 02:26, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
9.32 ug/l , sample collected Sep 14, 2011 02:26, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
3.44 ug/l , sample collected Sep 14, 2011 02:26, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
39.5 ug/l , sample collected Sep 14, 2011 02:26, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2011 – Dec 31, 2013
Collected
Sep 14, 2011 02:22
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
110915-004HA
Laboratory
MSDH Lab
0.002 mg/l , sample collected Sep 14, 2011 02:22, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.008 mg/l , sample collected Sep 14, 2011 02:22, sampling point MRT000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
0.006 mg/l , sample collected Sep 14, 2011 02:22, sampling point MRT000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 14, 2011 02:22, sampling point MRT000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 14, 2011 02:22, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.016 mg/l , sample collected Sep 14, 2011 02:22, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 Jan 1, 2011 – Dec 31, 2013
Collected
Jun 22, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110623-024PB
Laboratory
MSDH Lab
0.0182 mg/l , sample collected Jun 22, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
0.0029 mg/l , sample collected Jun 22, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Jun 22, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110623-019PB
Laboratory
MSDH Lab
0.0307 mg/l , sample collected Jun 22, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
0.0012 mg/l , sample collected Jun 22, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Jun 22, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110623-018PB
Laboratory
MSDH Lab
0.0382 mg/l , sample collected Jun 22, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
0.0008 mg/l , sample collected Jun 22, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Jun 22, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110623-016PB
Laboratory
MSDH Lab
0.0284 mg/l , sample collected Jun 22, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
0.0006 mg/l , sample collected Jun 22, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Jun 22, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110623-015PB
Laboratory
MSDH Lab
0.0782 mg/l , sample collected Jun 22, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 22, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Jun 21, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110623-025PB
Laboratory
MSDH Lab
0.0284 mg/l , sample collected Jun 21, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
0.0007 mg/l , sample collected Jun 21, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Jun 21, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110623-017PB
Laboratory
MSDH Lab
0.0957 mg/l , sample collected Jun 21, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
0.0037 mg/l , sample collected Jun 21, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011

Routine (10).