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
MS0690053 , Hidden Valley Light Assn
Hidden Valley Light Assn has been analysed for 63 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.
61 of these are chemical, radiological or water-quality analytes, and their results are on the chemical and radiological samples page — which counts 61, not 63, 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 | 19 | Nov 30, 2022 |
| 1,1,2-Trichloroethane 2985 | Organic Chemical | 19 | Nov 30, 2022 |
| 1,1-Dichloroethylene 2977 | Organic Chemical | 19 | Nov 30, 2022 |
| 1,2,4-Trichlorobenzene 2378 | Organic Chemical | 19 | Nov 30, 2022 |
| 1,2-Dichloroethane 2980 | Organic Chemical | 19 | Nov 30, 2022 |
| 1,2-Dichloropropane 2983 | Organic Chemical | 19 | Nov 30, 2022 |
| Alkalinity, Total 1927 | Water Quality | 1 | May 19, 2021 |
| Antimony, Total 1074 | Inorganic Chemical | 5 | Mar 31, 2025 |
| Arsenic 1005 | Inorganic Chemical | 5 | Mar 31, 2025 |
| Barium 1010 | Inorganic Chemical | 5 | Mar 31, 2025 |
| Benzene 2990 | Organic Chemical | 19 | Nov 30, 2022 |
| Beryllium, Total 1075 | Inorganic Chemical | 5 | Mar 31, 2025 |
| Bromodichloromethane 2943 | Organic Chemical | 4 | Aug 23, 2016 |
| Bromoform 2942 | Organic Chemical | 4 | Aug 23, 2016 |
| Cadmium 1015 | Inorganic Chemical | 5 | Mar 31, 2025 |
| Calcium 1016 | Inorganic Chemical | 1 | May 19, 2021 |
| Carbon Tetrachloride 2982 | Organic Chemical | 19 | Nov 30, 2022 |
| Chloride 1017 | Inorganic Chemical | 1 | May 19, 2021 |
| Chlorobenzene 2989 | Organic Chemical | 19 | Nov 30, 2022 |
| Chloroform 2941 | Organic Chemical | 4 | Aug 23, 2016 |
| Chromium 1020 | Inorganic Chemical | 5 | Mar 31, 2025 |
| Cis-1,2-Dichloroethylene 2380 | Organic Chemical | 19 | Nov 30, 2022 |
| Coliform (TCR) 3100 | Organism | 213 | Aug 11, 2026 |
| Color 1905 | Water Quality | 1 | May 19, 2021 |
| Combined Radium (-226 & -228) 4010 | Radionuclide | 5 | Jul 17, 2012 |
| Combined Uranium 4006 | Radionuclide | 4 | Oct 6, 2021 |
| Conductivity @ 25 C Umhos/CM 1064 | Water Quality | 1 | May 19, 2021 |
| Copper, Free 1022 | Inorganic Chemical | 55 | Aug 3, 2023 |
| Cyanide 1024 | Inorganic Chemical | 5 | Nov 18, 2025 |
| Dibromoacetic Acid 2454 | Organic Chemical | 4 | Aug 23, 2016 |
| Dibromochloromethane 2944 | Organic Chemical | 4 | Aug 23, 2016 |
| Dichloroacetic Acid 2451 | Organic Chemical | 4 | Aug 23, 2016 |
| Dichloromethane 2964 | Organic Chemical | 19 | Nov 30, 2022 |
| E. Coli 3014 | Organism | 103 | Aug 11, 2026 |
| Ethylbenzene 2992 | Organic Chemical | 19 | Nov 30, 2022 |
| Fluoride 1025 | Inorganic Chemical | 6 | Mar 31, 2025 |
| Gross Alpha, Incl. Radon & U 4002 | Radionuclide | 5 | Jul 17, 2012 |
| Lead 1030 | Inorganic Chemical | 55 | Aug 3, 2023 |
| Mercury 1035 | Inorganic Chemical | 5 | Mar 31, 2025 |
| Monobromoacetic Acid 2453 | Organic Chemical | 4 | Aug 23, 2016 |
| Monochloroacetic Acid 2450 | Organic Chemical | 4 | Aug 23, 2016 |
| Nickel 1036 | Inorganic Chemical | 5 | Mar 31, 2025 |
| Nitrate 1040 | Inorganic Chemical | 15 | Apr 14, 2025 |
| Nitrate-Nitrite 1038 | Inorganic Chemical | 15 | Apr 14, 2025 |
| Nitrite 1041 | Inorganic Chemical | 15 | Apr 14, 2025 |
| O-Dichlorobenzene 2968 | Organic Chemical | 19 | Nov 30, 2022 |
| P-Dichlorobenzene 2969 | Organic Chemical | 19 | Nov 30, 2022 |
| Radium-226 4020 | Radionuclide | 5 | Jul 17, 2012 |
| Radium-228 4030 | Radionuclide | 5 | Jul 17, 2012 |
| Selenium 1045 | Inorganic Chemical | 5 | Mar 31, 2025 |
| Sodium 1052 | Inorganic Chemical | 3 | Nov 13, 2023 |
| Styrene 2996 | Organic Chemical | 19 | Nov 30, 2022 |
| Sulfate 1055 | Inorganic Chemical | 1 | May 19, 2021 |
| Tetrachloroethylene 2987 | Organic Chemical | 19 | Nov 30, 2022 |
| Thallium, Total 1085 | Inorganic Chemical | 5 | Mar 31, 2025 |
| Toluene 2991 | Organic Chemical | 19 | Nov 30, 2022 |
| Total Haloacetic Acids (Haa5) 2456 | Organic Chemical | 6 | Feb 26, 2025 |
| Trans-1,2-Dichloroethylene 2979 | Organic Chemical | 19 | Nov 30, 2022 |
| Trichloroacetic Acid 2452 | Organic Chemical | 4 | Aug 23, 2016 |
| Trichloroethylene 2984 | Organic Chemical | 19 | Nov 30, 2022 |
| TTHM 2950 | Organic Chemical | 6 | Feb 26, 2025 |
| Vinyl Chloride 2976 | Organic Chemical | 19 | Nov 30, 2022 |
| Xylenes, Total 2955 | Organic Chemical | 18 | Nov 30, 2022 |
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.