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.
Analytes tested for
MS0240270 , HCUA-West
HCUA-West has been analysed for 44 analytes.
This is what has been looked for, not what has been found. Which of them have been detected, and when, is on the sample results page.
The agency also publishes one analyte list across every system it serves. That list carries no results and no counts, and it leaves out coliform and the other microbiological analytes — which this page does not.
42 of these are chemical, radiological or water-quality analytes, and their results are on the chemical and radiological samples page — which counts 42, not 44, for that reason. The other 2 — Coliform (TCR) and E. Coli — are organisms, and their records live with the coliform and microbial samples.
| Analyte | Kind | Results on record | Last collected |
|---|---|---|---|
| 1,1,1-Trichloroethane 2981 | Organic Chemical | 176 | Feb 11, 2025 |
| 1,1,2-Trichloroethane 2985 | Organic Chemical | 176 | Feb 11, 2025 |
| 1,1-Dichloroethylene 2977 | Organic Chemical | 176 | Feb 11, 2025 |
| 1,2,4-Trichlorobenzene 2378 | Organic Chemical | 176 | Feb 11, 2025 |
| 1,2-Dichloroethane 2980 | Organic Chemical | 176 | Feb 11, 2025 |
| 1,2-Dichloropropane 2983 | Organic Chemical | 176 | Feb 11, 2025 |
| Antimony, Total 1074 | Inorganic Chemical | 24 | Feb 12, 2025 |
| Arsenic 1005 | Inorganic Chemical | 24 | Feb 12, 2025 |
| Barium 1010 | Inorganic Chemical | 24 | Feb 12, 2025 |
| Benzene 2990 | Organic Chemical | 176 | Feb 11, 2025 |
| Beryllium, Total 1075 | Inorganic Chemical | 24 | Feb 12, 2025 |
| Cadmium 1015 | Inorganic Chemical | 24 | Feb 12, 2025 |
| Carbon Tetrachloride 2982 | Organic Chemical | 176 | Feb 11, 2025 |
| Chlorobenzene 2989 | Organic Chemical | 176 | Feb 11, 2025 |
| Chromium 1020 | Inorganic Chemical | 24 | Feb 12, 2025 |
| Cis-1,2-Dichloroethylene 2380 | Organic Chemical | 176 | Feb 11, 2025 |
| Coliform (TCR) 3100 | Organism | 149 | Aug 4, 2026 |
| Combined Radium (-226 & -228) 4010 | Radionuclide | 12 | Mar 30, 2015 |
| Combined Uranium 4006 | Radionuclide | 26 | Jan 9, 2024 |
| Cyanide 1024 | Inorganic Chemical | 24 | Aug 26, 2025 |
| Dichloromethane 2964 | Organic Chemical | 176 | Feb 11, 2025 |
| E. Coli 3014 | Organism | 93 | Aug 4, 2026 |
| Ethylbenzene 2992 | Organic Chemical | 176 | Feb 11, 2025 |
| Fluoride 1025 | Inorganic Chemical | 24 | Feb 12, 2025 |
| Gross Alpha, Incl. Radon & U 4002 | Radionuclide | 12 | Mar 30, 2015 |
| Mercury 1035 | Inorganic Chemical | 24 | Feb 12, 2025 |
| Nickel 1036 | Inorganic Chemical | 24 | Feb 12, 2025 |
| Nitrate 1040 | Inorganic Chemical | 66 | Feb 11, 2025 |
| Nitrate-Nitrite 1038 | Inorganic Chemical | 66 | Feb 11, 2025 |
| Nitrite 1041 | Inorganic Chemical | 66 | Feb 11, 2025 |
| O-Dichlorobenzene 2968 | Organic Chemical | 176 | Feb 11, 2025 |
| P-Dichlorobenzene 2969 | Organic Chemical | 176 | Feb 11, 2025 |
| Radium-226 4020 | Radionuclide | 12 | Mar 30, 2015 |
| Radium-228 4030 | Radionuclide | 12 | Mar 30, 2015 |
| Selenium 1045 | Inorganic Chemical | 24 | Feb 12, 2025 |
| Sodium 1052 | Inorganic Chemical | 12 | Dec 3, 2024 |
| Styrene 2996 | Organic Chemical | 176 | Feb 11, 2025 |
| Tetrachloroethylene 2987 | Organic Chemical | 176 | Feb 11, 2025 |
| Thallium, Total 1085 | Inorganic Chemical | 24 | Feb 12, 2025 |
| Toluene 2991 | Organic Chemical | 176 | Feb 11, 2025 |
| Trans-1,2-Dichloroethylene 2979 | Organic Chemical | 176 | Feb 11, 2025 |
| Trichloroethylene 2984 | Organic Chemical | 176 | Feb 11, 2025 |
| Vinyl Chloride 2976 | Organic Chemical | 176 | Feb 11, 2025 |
| Xylenes, Total 2955 | Organic Chemical | 176 | Feb 11, 2025 |
A result is one laboratory analysis for one analyte on one sample, whether or not anything was found. Counts cover every Accepted or Validated result on record, with no date range applied.
What an analyte is
“Analytes are contaminants and other elements (some of which are not necessarily contaminants), for which the drinking water is being analyzed.”
From the help text published with these pages.