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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

MS0240270 , HCUA-West

11 of the 42 analytes this system has been tested for have been detected at least once, across 352 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 352 samples on record, detections range from December 9, 2014 to February 12, 2025. 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 HCUA-West, 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
Xylenes, Total 2955 Organic Chemical 80 of 176 results Mar 11, 2015 Jan 5, 2022
Ethylbenzene 2992 Organic Chemical 47 of 176 results Mar 11, 2015 May 18, 2021
Barium 1010 Inorganic Chemical 24 of 24 results Mar 9, 2015 Feb 12, 2025
Fluoride 1025 Inorganic Chemical 24 of 24 results Mar 9, 2015 Feb 12, 2025
Sodium 1052 Inorganic Chemical 12 of 12 results Mar 15, 2021 Dec 3, 2024
Chromium 1020 Inorganic Chemical 12 of 24 results Mar 9, 2015 Oct 23, 2018
Gross Alpha, Incl. Radon & U 4002 Radionuclide 10 of 12 results Dec 9, 2014 Mar 30, 2015
Nickel 1036 Inorganic Chemical 3 of 24 results Apr 26, 2022 Feb 12, 2025
Cyanide 1024 Inorganic Chemical 1 of 24 results May 22, 2018 May 22, 2018
Arsenic 1005 Inorganic Chemical 1 of 24 results Mar 11, 2015 Mar 11, 2015
Combined Uranium 4006 Radionuclide 1 of 26 results Feb 5, 2015 Feb 5, 2015

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 341–350 of 352 samples, newest first — collected December 9, 2014 to December 9, 2014. The summary above covers all 352.

20 results from the 10 samples listed here: 5 detected, 15 not detected. Across the whole record it is 215 of 4,268. 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 HCUA-West, every result from 341 to 350 of 352 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
Dec 9, 2014 09:30
Sampling point
TF106 Treatment Facility TF106
Sample type
Routine
Lab sample
201412150010GA
Laboratory
Radiation Safety Engineering
2.2 pci/l , sample collected Dec 9, 2014 09:30, sampling point TF106 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Oct 1, 2014 – Dec 31, 2014
Collected
Dec 9, 2014 09:30
Sampling point
TF106 Treatment Facility TF106
Sample type
Routine
Lab sample
201412150010
Laboratory
Radiation Safety Engineering
Not detected below 0.33 pci/l Minimum Reporting Level , sample collected Dec 9, 2014 09:30, sampling point TF106 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.33 pci/l Minimum Reporting Level , sample collected Dec 9, 2014 09:30, sampling point TF106 Radium-226 4020 EPA method 903.1 Oct 1, 2014 – Dec 31, 2014
Not detected below 0.31 pci/l Minimum Reporting Level , sample collected Dec 9, 2014 09:30, sampling point TF106 Radium-228 4030 EPA method 904 Oct 1, 2014 – Dec 31, 2014
Collected
Dec 9, 2014 10:30
Sampling point
TF105 Treatment Facility TF105
Sample type
Routine
Lab sample
201412150009GA
Laboratory
Radiation Safety Engineering
1.2 pci/l , sample collected Dec 9, 2014 10:30, sampling point TF105 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Oct 1, 2014 – Dec 31, 2014
Collected
Dec 9, 2014 10:30
Sampling point
TF105 Treatment Facility TF105
Sample type
Routine
Lab sample
201412150009
Laboratory
Radiation Safety Engineering
Not detected below 0.32 pci/l Minimum Reporting Level , sample collected Dec 9, 2014 10:30, sampling point TF105 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.196 pci/l Minimum Reporting Level , sample collected Dec 9, 2014 10:30, sampling point TF105 Radium-226 4020 EPA method 903.1 Oct 1, 2014 – Dec 31, 2014
Not detected below 0.32 pci/l Minimum Reporting Level , sample collected Dec 9, 2014 10:30, sampling point TF105 Radium-228 4030 EPA method 904 Oct 1, 2014 – Dec 31, 2014
Collected
Dec 9, 2014 14:38
Sampling point
TF104 Treatment Facility TF104
Sample type
Routine
Lab sample
201412150008GA
Laboratory
Radiation Safety Engineering
0.4 pci/l , sample collected Dec 9, 2014 14:38, sampling point TF104 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Oct 1, 2014 – Dec 31, 2014
Collected
Dec 9, 2014 14:38
Sampling point
TF104 Treatment Facility TF104
Sample type
Routine
Lab sample
201412150008
Laboratory
Radiation Safety Engineering
Not detected below 0.41 pci/l Minimum Reporting Level , sample collected Dec 9, 2014 14:38, sampling point TF104 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.235 pci/l Minimum Reporting Level , sample collected Dec 9, 2014 14:38, sampling point TF104 Radium-226 4020 EPA method 903.1 Oct 1, 2014 – Dec 31, 2014
Not detected below 0.41 pci/l Minimum Reporting Level , sample collected Dec 9, 2014 14:38, sampling point TF104 Radium-228 4030 EPA method 904 Oct 1, 2014 – Dec 31, 2014
Collected
Dec 9, 2014 14:50
Sampling point
TF103 Treatment Facility TF103
Sample type
Routine
Lab sample
201412150007GA
Laboratory
Radiation Safety Engineering
0.7 pci/l , sample collected Dec 9, 2014 14:50, sampling point TF103 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Oct 1, 2014 – Dec 31, 2014
Collected
Dec 9, 2014 14:50
Sampling point
TF103 Treatment Facility TF103
Sample type
Routine
Lab sample
201412150007
Laboratory
Radiation Safety Engineering
Not detected below 0.42 pci/l Minimum Reporting Level , sample collected Dec 9, 2014 14:50, sampling point TF103 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.207 pci/l Minimum Reporting Level , sample collected Dec 9, 2014 14:50, sampling point TF103 Radium-226 4020 EPA method 903.1 Oct 1, 2014 – Dec 31, 2014
Not detected below 0.42 pci/l Minimum Reporting Level , sample collected Dec 9, 2014 14:50, sampling point TF103 Radium-228 4030 EPA method 904 Oct 1, 2014 – Dec 31, 2014
Collected
Dec 9, 2014 11:30
Sampling point
TF102 Treatment Facility TF102
Sample type
Routine
Lab sample
201412150006GA
Laboratory
Radiation Safety Engineering
0.9 pci/l , sample collected Dec 9, 2014 11:30, sampling point TF102 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Oct 1, 2014 – Dec 31, 2014
Collected
Dec 9, 2014 11:30
Sampling point
TF102 Treatment Facility TF102
Sample type
Routine
Lab sample
201412150006
Laboratory
Radiation Safety Engineering
Not detected below 0.331 pci/l Minimum Reporting Level , sample collected Dec 9, 2014 11:30, sampling point TF102 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.331 pci/l Minimum Reporting Level , sample collected Dec 9, 2014 11:30, sampling point TF102 Radium-226 4020 EPA method 903.1 Oct 1, 2014 – Dec 31, 2014
Not detected below 0.32 pci/l Minimum Reporting Level , sample collected Dec 9, 2014 11:30, sampling point TF102 Radium-228 4030 EPA method 904 Oct 1, 2014 – Dec 31, 2014

Routine (10).