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
MS0140010 , Town of Lyon
Town of Lyon has been analysed for 60 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.
58 of these are chemical, radiological or water-quality analytes, and their results are on the chemical and radiological samples page — which counts 58, not 60, 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 | 33 | Apr 20, 2021 |
| 1,1,2-Trichloroethane 2985 | Organic Chemical | 33 | Apr 20, 2021 |
| 1,1-Dichloroethylene 2977 | Organic Chemical | 33 | Apr 20, 2021 |
| 1,2,4-Trichlorobenzene 2378 | Organic Chemical | 33 | Apr 20, 2021 |
| 1,2-Dichloroethane 2980 | Organic Chemical | 33 | Apr 20, 2021 |
| 1,2-Dichloropropane 2983 | Organic Chemical | 33 | Apr 20, 2021 |
| Antimony, Total 1074 | Inorganic Chemical | 12 | Mar 12, 2025 |
| Arsenic 1005 | Inorganic Chemical | 12 | Mar 12, 2025 |
| Barium 1010 | Inorganic Chemical | 12 | Mar 12, 2025 |
| Benzene 2990 | Organic Chemical | 33 | Apr 20, 2021 |
| Beryllium, Total 1075 | Inorganic Chemical | 12 | Mar 12, 2025 |
| Bromodichloromethane 2943 | Organic Chemical | 79 | May 19, 2020 |
| Bromoform 2942 | Organic Chemical | 79 | May 19, 2020 |
| Cadmium 1015 | Inorganic Chemical | 12 | Mar 12, 2025 |
| Carbon Tetrachloride 2982 | Organic Chemical | 33 | Apr 20, 2021 |
| Chlorobenzene 2989 | Organic Chemical | 33 | Apr 20, 2021 |
| Chloroform 2941 | Organic Chemical | 79 | May 19, 2020 |
| Chromium 1020 | Inorganic Chemical | 12 | Mar 12, 2025 |
| Cis-1,2-Dichloroethylene 2380 | Organic Chemical | 33 | Apr 20, 2021 |
| Coliform (TCR) 3100 | Organism | 290 | Jul 29, 2026 |
| Combined Radium (-226 & -228) 4010 | Radionuclide | 2 | Nov 28, 2011 |
| Combined Uranium 4006 | Radionuclide | 3 | Jul 17, 2018 |
| Copper, Free 1022 | Inorganic Chemical | 77 | Sep 30, 2025 |
| Cyanide 1024 | Inorganic Chemical | 10 | Dec 17, 2025 |
| Dibromoacetic Acid 2454 | Organic Chemical | 75 | May 19, 2020 |
| Dibromochloromethane 2944 | Organic Chemical | 79 | May 19, 2020 |
| Dichloroacetic Acid 2451 | Organic Chemical | 75 | May 19, 2020 |
| Dichloromethane 2964 | Organic Chemical | 33 | Apr 20, 2021 |
| E. Coli 3014 | Organism | 84 | Jul 29, 2026 |
| Ethylbenzene 2992 | Organic Chemical | 33 | Apr 20, 2021 |
| Fluoride 1025 | Inorganic Chemical | 12 | Mar 12, 2025 |
| Gross Alpha Particle Activity 4109 | Radionuclide | 6 | Sep 12, 2012 |
| Gross Alpha, Excl. Radon & U 4000 | Radionuclide | 2 | Nov 28, 2011 |
| Lead 1030 | Inorganic Chemical | 77 | Sep 30, 2025 |
| Mercury 1035 | Inorganic Chemical | 12 | Mar 12, 2025 |
| Monobromoacetic Acid 2453 | Organic Chemical | 75 | May 19, 2020 |
| Monochloroacetic Acid 2450 | Organic Chemical | 75 | May 19, 2020 |
| Nickel 1036 | Inorganic Chemical | 12 | Mar 12, 2025 |
| Nitrate 1040 | Inorganic Chemical | 20 | Mar 12, 2025 |
| Nitrate-Nitrite 1038 | Inorganic Chemical | 20 | Mar 12, 2025 |
| Nitrite 1041 | Inorganic Chemical | 20 | Mar 12, 2025 |
| O-Dichlorobenzene 2968 | Organic Chemical | 33 | Apr 20, 2021 |
| P-Dichlorobenzene 2969 | Organic Chemical | 33 | Apr 20, 2021 |
| Radium-226 4020 | Radionuclide | 2 | Nov 28, 2011 |
| Radium-228 4030 | Radionuclide | 2 | Nov 28, 2011 |
| Selenium 1045 | Inorganic Chemical | 12 | Mar 12, 2025 |
| Sodium 1052 | Inorganic Chemical | 1 | Sep 25, 2019 |
| Styrene 2996 | Organic Chemical | 33 | Apr 20, 2021 |
| Sulfate 1055 | Inorganic Chemical | 3 | Jan 26, 2004 |
| Tetrachloroethylene 2987 | Organic Chemical | 33 | Apr 20, 2021 |
| Thallium, Total 1085 | Inorganic Chemical | 12 | Mar 12, 2025 |
| Toluene 2991 | Organic Chemical | 33 | Apr 20, 2021 |
| Total Haloacetic Acids (Haa5) 2456 | Organic Chemical | 107 | Sep 24, 2025 |
| Trans-1,2-Dichloroethylene 2979 | Organic Chemical | 33 | Apr 20, 2021 |
| Trichloroacetic Acid 2452 | Organic Chemical | 75 | May 19, 2020 |
| Trichloroethylene 2984 | Organic Chemical | 33 | Apr 20, 2021 |
| TTHM 2950 | Organic Chemical | 112 | Sep 24, 2025 |
| Uranium-238 4009 | Radionuclide | 1 | Jan 23, 2006 |
| Vinyl Chloride 2976 | Organic Chemical | 33 | Apr 20, 2021 |
| Xylenes, Total 2955 | Organic Chemical | 33 | Apr 20, 2021 |
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.