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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 101–110 of 352 samples, newest first — collected March 15, 2021 to May 18, 2021. The summary above covers all 352.

30 results from the 10 samples listed here: 3 detected, 27 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 101 to 110 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
May 18, 2021 12:01
Sampling point
TF106 Treatment Facility TF106
Sample type
Routine
Lab sample
210519-007VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 18, 2021 12:01, sampling point TF106 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Apr 1, 2021 – Jun 30, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 18, 2021 12:01, sampling point TF106 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Apr 1, 2021 – Jun 30, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 18, 2021 12:01, sampling point TF106 Xylenes, Total 2955 EPA method 524.2 Apr 1, 2021 – Jun 30, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 18, 2021 12:01, sampling point TF106 Dichloromethane 2964 EPA method 524.2 Apr 1, 2021 – Jun 30, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 18, 2021 12:01, sampling point TF106 O-Dichlorobenzene 2968 EPA method 524.2 Apr 1, 2021 – Jun 30, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 18, 2021 12:01, sampling point TF106 P-Dichlorobenzene 2969 EPA method 524.2 Apr 1, 2021 – Jun 30, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 18, 2021 12:01, sampling point TF106 Vinyl Chloride 2976 EPA method 524.2 Apr 1, 2021 – Jun 30, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 18, 2021 12:01, sampling point TF106 1,1-Dichloroethylene 2977 EPA method 524.2 Apr 1, 2021 – Jun 30, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 18, 2021 12:01, sampling point TF106 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Apr 1, 2021 – Jun 30, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 18, 2021 12:01, sampling point TF106 1,2-Dichloroethane 2980 EPA method 524.2 Apr 1, 2021 – Jun 30, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 18, 2021 12:01, sampling point TF106 1,1,1-Trichloroethane 2981 EPA method 524.2 Apr 1, 2021 – Jun 30, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 18, 2021 12:01, sampling point TF106 Carbon Tetrachloride 2982 EPA method 524.2 Apr 1, 2021 – Jun 30, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 18, 2021 12:01, sampling point TF106 1,2-Dichloropropane 2983 EPA method 524.2 Apr 1, 2021 – Jun 30, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 18, 2021 12:01, sampling point TF106 Trichloroethylene 2984 EPA method 524.2 Apr 1, 2021 – Jun 30, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 18, 2021 12:01, sampling point TF106 1,1,2-Trichloroethane 2985 EPA method 524.2 Apr 1, 2021 – Jun 30, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 18, 2021 12:01, sampling point TF106 Tetrachloroethylene 2987 EPA method 524.2 Apr 1, 2021 – Jun 30, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 18, 2021 12:01, sampling point TF106 Chlorobenzene 2989 EPA method 524.2 Apr 1, 2021 – Jun 30, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 18, 2021 12:01, sampling point TF106 Benzene 2990 EPA method 524.2 Apr 1, 2021 – Jun 30, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 18, 2021 12:01, sampling point TF106 Toluene 2991 EPA method 524.2 Apr 1, 2021 – Jun 30, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 18, 2021 12:01, sampling point TF106 Ethylbenzene 2992 EPA method 524.2 Apr 1, 2021 – Jun 30, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 18, 2021 12:01, sampling point TF106 Styrene 2996 EPA method 524.2 Apr 1, 2021 – Jun 30, 2021
Collected
May 12, 2021 13:28
Sampling point
TF105 Treatment Facility TF105
Sample type
Routine
Lab sample
CN-210512-018
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected May 12, 2021 13:28, sampling point TF105 Cyanide 1024 EPA method QC10204001X Jan 1, 2020 – Dec 31, 2022
Collected
May 12, 2021 13:44
Sampling point
TF104 Treatment Facility TF104
Sample type
Routine
Lab sample
CN-210512-017
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected May 12, 2021 13:44, sampling point TF104 Cyanide 1024 EPA method QC10204001X Jan 1, 2020 – Dec 31, 2022
Collected
May 12, 2021 12:23
Sampling point
TF103 Treatment Facility TF103
Sample type
Routine
Lab sample
CN-210512-016
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected May 12, 2021 12:23, sampling point TF103 Cyanide 1024 EPA method QC10204001X Jan 1, 2020 – Dec 31, 2022
Collected
May 12, 2021 12:38
Sampling point
TF102 Treatment Facility TF102
Sample type
Routine
Lab sample
CN-210512-015
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected May 12, 2021 12:38, sampling point TF102 Cyanide 1024 EPA method QC10204001X Jan 1, 2020 – Dec 31, 2022
Collected
May 12, 2021 12:59
Sampling point
TF101 Treatment Facility TF101
Sample type
Routine
Lab sample
CN-210512-014
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected May 12, 2021 12:59, sampling point TF101 Cyanide 1024 EPA method QC10204001X Jan 1, 2020 – Dec 31, 2022
Collected
May 12, 2021 12:09
Sampling point
TF106 Treatment Facility TF106
Sample type
Routine
Lab sample
CN-210512-019
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected May 12, 2021 12:09, sampling point TF106 Cyanide 1024 EPA method QC10204001X Jan 1, 2020 – Dec 31, 2022
Collected
Mar 15, 2021 12:57
Sampling point
TF106 Treatment Facility TF106
Sample type
Routine
Lab sample
NA-210316-006
Laboratory
MSDH Lab
63.7 mg/l , sample collected Mar 15, 2021 12:57, sampling point TF106 Sodium 1052 EPA method 200.7 Not recorded
Collected
Mar 15, 2021 13:02
Sampling point
TF105 Treatment Facility TF105
Sample type
Routine
Lab sample
NA-210316-005
Laboratory
MSDH Lab
69.6 mg/l , sample collected Mar 15, 2021 13:02, sampling point TF105 Sodium 1052 EPA method 200.7 Not recorded
Collected
Mar 15, 2021 13:42
Sampling point
TF104 Treatment Facility TF104
Sample type
Routine
Lab sample
NA-210316-004
Laboratory
MSDH Lab
107 mg/l , sample collected Mar 15, 2021 13:42, sampling point TF104 Sodium 1052 EPA method 200.7 Not recorded

Routine (10).