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
MS0620010 , Sebastopol Water Association
Sebastopol Water Association has been analysed for 77 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.
75 of these are chemical, radiological or water-quality analytes, and their results are on the chemical and radiological samples page — which counts 75, not 77, 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 | 44 | Nov 30, 2022 |
| 1,1,2-Trichloroethane 2985 | Organic Chemical | 44 | Nov 30, 2022 |
| 1,1-Dichloroethylene 2977 | Organic Chemical | 44 | Nov 30, 2022 |
| 1,2,4-Trichlorobenzene 2378 | Organic Chemical | 44 | Nov 30, 2022 |
| 1,2-Dichloroethane 2980 | Organic Chemical | 44 | Nov 30, 2022 |
| 1,2-Dichloropropane 2983 | Organic Chemical | 44 | Nov 30, 2022 |
| Alkalinity, Caco3 Stability 1067 | Water Quality | 4 | May 25, 2017 |
| Alkalinity, Total 1927 | Water Quality | 4 | May 25, 2017 |
| Antimony, Total 1074 | Inorganic Chemical | 59 | Jun 23, 2026 |
| Arsenic 1005 | Inorganic Chemical | 59 | Jun 23, 2026 |
| Asbestos 1094 | Inorganic Chemical | 1 | Sep 10, 2019 |
| Barium 1010 | Inorganic Chemical | 59 | Jun 23, 2026 |
| Benzene 2990 | Organic Chemical | 44 | Nov 30, 2022 |
| Beryllium, Total 1075 | Inorganic Chemical | 59 | Jun 23, 2026 |
| Bromodichloromethane 2943 | Organic Chemical | 23 | Jun 23, 2026 |
| Bromoform 2942 | Organic Chemical | 23 | Jun 23, 2026 |
| Cadmium 1015 | Inorganic Chemical | 59 | Jun 23, 2026 |
| Calcium 1016 | Inorganic Chemical | 4 | May 25, 2017 |
| Calculated Sodium NACA | Water Quality | 4 | May 25, 2017 |
| Carbon Dioxide 1901 | Water Quality | 3 | Nov 9, 2009 |
| Carbon Tetrachloride 2982 | Organic Chemical | 44 | Nov 30, 2022 |
| Chloride 1017 | Inorganic Chemical | 4 | May 25, 2017 |
| Chlorobenzene 2989 | Organic Chemical | 44 | Nov 30, 2022 |
| Chloroform 2941 | Organic Chemical | 23 | Jun 23, 2026 |
| Chromium 1020 | Inorganic Chemical | 59 | Jun 23, 2026 |
| Cis-1,2-Dichloroethylene 2380 | Organic Chemical | 44 | Nov 30, 2022 |
| Coliform (TCR) 3100 | Organism | 1,762 | Aug 11, 2026 |
| Color 1905 | Water Quality | 1 | May 25, 2017 |
| Combined Radium (-226 & -228) 4010 | Radionuclide | 2 | Mar 10, 2014 |
| Combined Uranium 4006 | Radionuclide | 32 | Oct 12, 2021 |
| Copper, Free 1022 | Inorganic Chemical | 162 | Jul 1, 2025 |
| Cyanide 1024 | Inorganic Chemical | 58 | Nov 3, 2025 |
| Dibromoacetic Acid 2454 | Organic Chemical | 23 | Jun 23, 2026 |
| Dibromochloromethane 2944 | Organic Chemical | 23 | Jun 23, 2026 |
| Dichloroacetic Acid 2451 | Organic Chemical | 23 | Jun 23, 2026 |
| Dichloromethane 2964 | Organic Chemical | 44 | Nov 30, 2022 |
| E. Coli 3014 | Organism | 645 | Aug 11, 2026 |
| Ethylbenzene 2992 | Organic Chemical | 44 | Nov 30, 2022 |
| Fluoride 1025 | Inorganic Chemical | 63 | Jul 15, 2026 |
| Gross Alpha Particle Activity 4109 | Radionuclide | 1 | Mar 10, 2014 |
| Gross Alpha, Incl. Radon & U 4002 | Radionuclide | 1 | Dec 2, 2013 |
| Hardness, Total (As Caco3) 1915 | Water Quality | 4 | May 25, 2017 |
| Iron 1028 | Inorganic Chemical | 4 | May 25, 2017 |
| Iron, Field Result FEFD | Inorganic Chemical | 3 | Nov 9, 2009 |
| Lead 1030 | Inorganic Chemical | 162 | Jul 1, 2025 |
| Magnesium 1031 | Inorganic Chemical | 4 | May 25, 2017 |
| Manganese 1032 | Inorganic Chemical | 4 | May 25, 2017 |
| Mercury 1035 | Inorganic Chemical | 59 | Jun 23, 2026 |
| Monobromoacetic Acid 2453 | Organic Chemical | 23 | Jun 23, 2026 |
| Monochloroacetic Acid 2450 | Organic Chemical | 23 | Jun 23, 2026 |
| Nickel 1036 | Inorganic Chemical | 58 | Mar 24, 2025 |
| Nitrate 1040 | Inorganic Chemical | 141 | Feb 10, 2026 |
| Nitrate-Nitrite 1038 | Inorganic Chemical | 141 | Feb 10, 2026 |
| Nitrite 1041 | Inorganic Chemical | 141 | Feb 10, 2026 |
| O-Dichlorobenzene 2968 | Organic Chemical | 44 | Nov 30, 2022 |
| P-Dichlorobenzene 2969 | Organic Chemical | 44 | Nov 30, 2022 |
| PH 1925 | Water Quality | 1 | Nov 9, 2009 |
| PH, Field Result PHFD | Water Quality | 3 | Nov 9, 2009 |
| Potassium 1042 | Inorganic Chemical | 4 | May 25, 2017 |
| Radium-226 4020 | Radionuclide | 2 | Mar 10, 2014 |
| Radium-228 4030 | Radionuclide | 2 | Mar 10, 2014 |
| Residue, Total, Filterable 1057 | Water Quality | 4 | May 25, 2017 |
| Selenium 1045 | Inorganic Chemical | 59 | Jun 23, 2026 |
| Sodium 1052 | Inorganic Chemical | 23 | Jul 16, 2026 |
| Styrene 2996 | Organic Chemical | 44 | Nov 30, 2022 |
| Sulfate 1055 | Inorganic Chemical | 8 | May 25, 2017 |
| Tetrachloroethylene 2987 | Organic Chemical | 44 | Nov 30, 2022 |
| Thallium, Total 1085 | Inorganic Chemical | 59 | Jun 23, 2026 |
| Toluene 2991 | Organic Chemical | 44 | Nov 30, 2022 |
| Total Haloacetic Acids (Haa5) 2456 | Organic Chemical | 29 | Jun 23, 2026 |
| Trans-1,2-Dichloroethylene 2979 | Organic Chemical | 44 | Nov 30, 2022 |
| Trichloroacetic Acid 2452 | Organic Chemical | 23 | Jun 23, 2026 |
| Trichloroethylene 2984 | Organic Chemical | 44 | Nov 30, 2022 |
| TTHM 2950 | Organic Chemical | 28 | Jun 23, 2026 |
| Uranium-238 4009 | Radionuclide | 7 | Apr 26, 2006 |
| Vinyl Chloride 2976 | Organic Chemical | 44 | Nov 30, 2022 |
| Xylenes, Total 2955 | Organic Chemical | 44 | 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.