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
MS0610016 , Monterey Water Assn-West
Monterey Water Assn-West has been analysed for 75 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.
73 of these are chemical, radiological or water-quality analytes, and their results are on the chemical and radiological samples page — which counts 73, not 75, 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 | 89 | Mar 24, 2025 |
| 1,1,2-Trichloroethane 2985 | Organic Chemical | 89 | Mar 24, 2025 |
| 1,1-Dichloroethylene 2977 | Organic Chemical | 89 | Mar 24, 2025 |
| 1,2,4-Trichlorobenzene 2378 | Organic Chemical | 89 | Mar 24, 2025 |
| 1,2-Dichloroethane 2980 | Organic Chemical | 89 | Mar 24, 2025 |
| 1,2-Dichloropropane 2983 | Organic Chemical | 89 | Mar 24, 2025 |
| Alkalinity, Caco3 Stability 1067 | Water Quality | 3 | Feb 19, 2009 |
| Alkalinity, Total 1927 | Water Quality | 3 | Feb 19, 2009 |
| Antimony, Total 1074 | Inorganic Chemical | 36 | Mar 24, 2025 |
| Arsenic 1005 | Inorganic Chemical | 36 | Mar 24, 2025 |
| Barium 1010 | Inorganic Chemical | 36 | Mar 24, 2025 |
| Benzene 2990 | Organic Chemical | 89 | Mar 24, 2025 |
| Beryllium, Total 1075 | Inorganic Chemical | 36 | Mar 24, 2025 |
| Bromodichloromethane 2943 | Organic Chemical | 31 | Jun 29, 2026 |
| Bromoform 2942 | Organic Chemical | 31 | Jun 29, 2026 |
| Cadmium 1015 | Inorganic Chemical | 36 | Mar 24, 2025 |
| Calcium 1016 | Inorganic Chemical | 3 | Feb 19, 2009 |
| Calculated Sodium NACA | Water Quality | 3 | Feb 19, 2009 |
| Carbon Dioxide 1901 | Water Quality | 3 | Feb 19, 2009 |
| Carbon Tetrachloride 2982 | Organic Chemical | 89 | Mar 24, 2025 |
| Chloride 1017 | Inorganic Chemical | 3 | Feb 19, 2009 |
| Chlorobenzene 2989 | Organic Chemical | 89 | Mar 24, 2025 |
| Chloroform 2941 | Organic Chemical | 31 | Jun 29, 2026 |
| Chromium 1020 | Inorganic Chemical | 36 | Mar 24, 2025 |
| Cis-1,2-Dichloroethylene 2380 | Organic Chemical | 89 | Mar 24, 2025 |
| Coliform (TCR) 3100 | Organism | 840 | Aug 13, 2026 |
| Color 1905 | Water Quality | 3 | Feb 19, 2009 |
| Combined Radium (-226 & -228) 4010 | Radionuclide | 20 | Oct 16, 2012 |
| Combined Uranium 4006 | Radionuclide | 20 | Oct 13, 2021 |
| Copper, Free 1022 | Inorganic Chemical | 61 | Jul 20, 2023 |
| Cyanide 1024 | Inorganic Chemical | 31 | Aug 25, 2025 |
| Dibromoacetic Acid 2454 | Organic Chemical | 28 | Nov 24, 2025 |
| Dibromochloromethane 2944 | Organic Chemical | 31 | Jun 29, 2026 |
| Dichloroacetic Acid 2451 | Organic Chemical | 28 | Nov 24, 2025 |
| Dichloromethane 2964 | Organic Chemical | 89 | Mar 24, 2025 |
| E. Coli 3014 | Organism | 263 | Aug 13, 2026 |
| Ethylbenzene 2992 | Organic Chemical | 89 | Mar 24, 2025 |
| Fluoride 1025 | Inorganic Chemical | 39 | Mar 24, 2025 |
| Gross Alpha, Incl. Radon & U 4002 | Radionuclide | 20 | Oct 16, 2012 |
| Hardness, Total (As Caco3) 1915 | Water Quality | 3 | Feb 19, 2009 |
| Iron 1028 | Inorganic Chemical | 3 | Feb 19, 2009 |
| Iron, Field Result FEFD | Inorganic Chemical | 3 | Feb 19, 2009 |
| Lead 1030 | Inorganic Chemical | 61 | Jul 20, 2023 |
| Magnesium 1031 | Inorganic Chemical | 3 | Feb 19, 2009 |
| Manganese 1032 | Inorganic Chemical | 3 | Feb 19, 2009 |
| Mercury 1035 | Inorganic Chemical | 35 | Mar 24, 2025 |
| Monobromoacetic Acid 2453 | Organic Chemical | 28 | Nov 24, 2025 |
| Monochloroacetic Acid 2450 | Organic Chemical | 28 | Nov 24, 2025 |
| Nickel 1036 | Inorganic Chemical | 36 | Mar 24, 2025 |
| Nitrate 1040 | Inorganic Chemical | 84 | Apr 10, 2025 |
| Nitrate-Nitrite 1038 | Inorganic Chemical | 84 | Apr 10, 2025 |
| Nitrite 1041 | Inorganic Chemical | 84 | Apr 10, 2025 |
| O-Dichlorobenzene 2968 | Organic Chemical | 89 | Mar 24, 2025 |
| P-Dichlorobenzene 2969 | Organic Chemical | 89 | Mar 24, 2025 |
| PH 1925 | Water Quality | 2 | Feb 19, 2009 |
| PH, Field Result PHFD | Water Quality | 3 | Feb 19, 2009 |
| Potassium 1042 | Inorganic Chemical | 3 | Feb 19, 2009 |
| Radium-226 4020 | Radionuclide | 20 | Oct 16, 2012 |
| Radium-228 4030 | Radionuclide | 20 | Oct 16, 2012 |
| Residue, Total, Filterable 1057 | Water Quality | 3 | Feb 19, 2009 |
| Selenium 1045 | Inorganic Chemical | 36 | Mar 24, 2025 |
| Sodium 1052 | Inorganic Chemical | 11 | Dec 14, 2023 |
| Styrene 2996 | Organic Chemical | 89 | Mar 24, 2025 |
| Sulfate 1055 | Inorganic Chemical | 6 | Feb 19, 2009 |
| Tetrachloroethylene 2987 | Organic Chemical | 89 | Mar 24, 2025 |
| Thallium, Total 1085 | Inorganic Chemical | 36 | Mar 24, 2025 |
| Toluene 2991 | Organic Chemical | 89 | Mar 24, 2025 |
| Total Haloacetic Acids (Haa5) 2456 | Organic Chemical | 35 | Nov 24, 2025 |
| Trans-1,2-Dichloroethylene 2979 | Organic Chemical | 89 | Mar 24, 2025 |
| Trichloroacetic Acid 2452 | Organic Chemical | 28 | Nov 24, 2025 |
| Trichloroethylene 2984 | Organic Chemical | 89 | Mar 24, 2025 |
| TTHM 2950 | Organic Chemical | 36 | Jun 29, 2026 |
| Uranium-238 4009 | Radionuclide | 6 | Mar 27, 2006 |
| Vinyl Chloride 2976 | Organic Chemical | 89 | Mar 24, 2025 |
| Xylenes, Total 2955 | Organic Chemical | 89 | Mar 24, 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.