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
MS0450016 , West Madison Utl Dist
West Madison Utl Dist has been analysed for 74 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.
72 of these are chemical, radiological or water-quality analytes, and their results are on the chemical and radiological samples page — which counts 72, not 74, 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 | 30 | Jun 23, 2026 |
| 1,1,2-Trichloroethane 2985 | Organic Chemical | 30 | Jun 23, 2026 |
| 1,1-Dichloroethylene 2977 | Organic Chemical | 30 | Jun 23, 2026 |
| 1,2,4-Trichlorobenzene 2378 | Organic Chemical | 30 | Jun 23, 2026 |
| 1,2-Dichloroethane 2980 | Organic Chemical | 30 | Jun 23, 2026 |
| 1,2-Dichloropropane 2983 | Organic Chemical | 30 | Jun 23, 2026 |
| Alkalinity, Total 1927 | Water Quality | 1 | Feb 13, 2018 |
| Antimony, Total 1074 | Inorganic Chemical | 22 | Jun 23, 2026 |
| Arsenic 1005 | Inorganic Chemical | 22 | Jun 23, 2026 |
| Barium 1010 | Inorganic Chemical | 22 | Jun 23, 2026 |
| Benzene 2990 | Organic Chemical | 30 | Jun 23, 2026 |
| Beryllium, Total 1075 | Inorganic Chemical | 22 | Jun 23, 2026 |
| Bromodichloromethane 2943 | Organic Chemical | 20 | Jun 25, 2026 |
| Bromoform 2942 | Organic Chemical | 20 | Jun 25, 2026 |
| Cadmium 1015 | Inorganic Chemical | 22 | Jun 23, 2026 |
| Calcium 1016 | Inorganic Chemical | 1 | Feb 13, 2018 |
| Calculated Sodium NACA | Water Quality | 1 | Feb 13, 2018 |
| Carbon Dioxide 1901 | Water Quality | 1 | Feb 13, 2018 |
| Carbon Tetrachloride 2982 | Organic Chemical | 30 | Jun 23, 2026 |
| Chloride 1017 | Inorganic Chemical | 1 | Feb 13, 2018 |
| Chlorobenzene 2989 | Organic Chemical | 30 | Jun 23, 2026 |
| Chloroform 2941 | Organic Chemical | 19 | Jun 25, 2026 |
| Chromium 1020 | Inorganic Chemical | 22 | Jun 23, 2026 |
| Cis-1,2-Dichloroethylene 2380 | Organic Chemical | 30 | Jun 23, 2026 |
| Coliform (TCR) 3100 | Organism | 532 | Jul 14, 2026 |
| Color 1905 | Water Quality | 1 | Feb 13, 2018 |
| Combined Radium (-226 & -228) 4010 | Radionuclide | 7 | Dec 12, 2012 |
| Combined Uranium 4006 | Radionuclide | 7 | Oct 12, 2021 |
| Copper, Free 1022 | Inorganic Chemical | 55 | Sep 21, 2023 |
| Cyanide 1024 | Inorganic Chemical | 15 | Jul 12, 2023 |
| Dibromoacetic Acid 2454 | Organic Chemical | 20 | Jun 25, 2026 |
| Dibromochloromethane 2944 | Organic Chemical | 20 | Jun 25, 2026 |
| Dichloroacetic Acid 2451 | Organic Chemical | 20 | Jun 25, 2026 |
| Dichloromethane 2964 | Organic Chemical | 30 | Jun 23, 2026 |
| E. Coli 3014 | Organism | 178 | Jul 14, 2026 |
| Ethylbenzene 2992 | Organic Chemical | 30 | Jun 23, 2026 |
| Fluoride 1025 | Inorganic Chemical | 23 | Jun 23, 2026 |
| Gross Alpha Particle Activity 4109 | Radionuclide | 2 | Dec 12, 2012 |
| Gross Alpha, Incl. Radon & U 4002 | Radionuclide | 5 | Jul 17, 2012 |
| Hardness, Total (As Caco3) 1915 | Water Quality | 1 | Feb 13, 2018 |
| Iron 1028 | Inorganic Chemical | 1 | Feb 13, 2018 |
| Iron, Field Result FEFD | Inorganic Chemical | 1 | Feb 13, 2018 |
| Lead 1030 | Inorganic Chemical | 55 | Sep 21, 2023 |
| Magnesium 1031 | Inorganic Chemical | 1 | Feb 13, 2018 |
| Manganese 1032 | Inorganic Chemical | 1 | Feb 13, 2018 |
| Mercury 1035 | Inorganic Chemical | 22 | Jun 23, 2026 |
| Monobromoacetic Acid 2453 | Organic Chemical | 20 | Jun 25, 2026 |
| Monochloroacetic Acid 2450 | Organic Chemical | 20 | Jun 25, 2026 |
| Nickel 1036 | Inorganic Chemical | 21 | Feb 12, 2024 |
| Nitrate 1040 | Inorganic Chemical | 31 | Jun 23, 2026 |
| Nitrate-Nitrite 1038 | Inorganic Chemical | 31 | Jun 23, 2026 |
| Nitrite 1041 | Inorganic Chemical | 31 | Jun 23, 2026 |
| O-Dichlorobenzene 2968 | Organic Chemical | 30 | Jun 23, 2026 |
| P-Dichlorobenzene 2969 | Organic Chemical | 30 | Jun 23, 2026 |
| PH, Field Result PHFD | Water Quality | 1 | Feb 13, 2018 |
| Potassium 1042 | Inorganic Chemical | 1 | Feb 13, 2018 |
| Radium-226 4020 | Radionuclide | 7 | Dec 12, 2012 |
| Radium-228 4030 | Radionuclide | 7 | Dec 12, 2012 |
| Residue, Total, Filterable 1057 | Water Quality | 1 | Feb 13, 2018 |
| Selenium 1045 | Inorganic Chemical | 22 | Jun 23, 2026 |
| Sodium 1052 | Inorganic Chemical | 6 | Jun 23, 2026 |
| Styrene 2996 | Organic Chemical | 30 | Jun 23, 2026 |
| Sulfate 1055 | Inorganic Chemical | 7 | Feb 13, 2018 |
| Tetrachloroethylene 2987 | Organic Chemical | 30 | Jun 23, 2026 |
| Thallium, Total 1085 | Inorganic Chemical | 22 | Jun 23, 2026 |
| Toluene 2991 | Organic Chemical | 30 | Jun 23, 2026 |
| Total Haloacetic Acids (Haa5) 2456 | Organic Chemical | 25 | Jun 25, 2026 |
| Trans-1,2-Dichloroethylene 2979 | Organic Chemical | 30 | Jun 23, 2026 |
| Trichloroacetic Acid 2452 | Organic Chemical | 20 | Jun 25, 2026 |
| Trichloroethylene 2984 | Organic Chemical | 30 | Jun 23, 2026 |
| TTHM 2950 | Organic Chemical | 25 | Jun 25, 2026 |
| Uranium-238 4009 | Radionuclide | 1 | Mar 8, 2006 |
| Vinyl Chloride 2976 | Organic Chemical | 30 | Jun 23, 2026 |
| Xylenes, Total 2955 | Organic Chemical | 30 | Jun 23, 2026 |
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.