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
MS0500009 , Central W/A-Southwest
Central W/A-Southwest 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 | 63 | Jul 26, 2022 |
| 1,1,2-Trichloroethane 2985 | Organic Chemical | 63 | Jul 26, 2022 |
| 1,1-Dichloroethylene 2977 | Organic Chemical | 63 | Jul 26, 2022 |
| 1,2,4-Trichlorobenzene 2378 | Organic Chemical | 63 | Jul 26, 2022 |
| 1,2-Dichloroethane 2980 | Organic Chemical | 63 | Jul 26, 2022 |
| 1,2-Dichloropropane 2983 | Organic Chemical | 63 | Jul 26, 2022 |
| Alkalinity, Caco3 Stability 1067 | Water Quality | 1 | Apr 7, 2017 |
| Alkalinity, Total 1927 | Water Quality | 7 | Apr 7, 2017 |
| Antimony, Total 1074 | Inorganic Chemical | 24 | Mar 18, 2025 |
| Arsenic 1005 | Inorganic Chemical | 24 | Mar 18, 2025 |
| Barium 1010 | Inorganic Chemical | 24 | Mar 18, 2025 |
| Benzene 2990 | Organic Chemical | 63 | Jul 26, 2022 |
| Beryllium, Total 1075 | Inorganic Chemical | 24 | Mar 18, 2025 |
| Bromodichloromethane 2943 | Organic Chemical | 15 | Nov 18, 2025 |
| Bromoform 2942 | Organic Chemical | 15 | Nov 18, 2025 |
| Cadmium 1015 | Inorganic Chemical | 24 | Mar 18, 2025 |
| Calcium 1016 | Inorganic Chemical | 7 | Apr 7, 2017 |
| Calculated Sodium NACA | Water Quality | 7 | Apr 7, 2017 |
| Carbon Dioxide 1901 | Water Quality | 6 | Apr 7, 2017 |
| Carbon Tetrachloride 2982 | Organic Chemical | 63 | Jul 26, 2022 |
| Chloride 1017 | Inorganic Chemical | 7 | Apr 7, 2017 |
| Chlorobenzene 2989 | Organic Chemical | 63 | Jul 26, 2022 |
| Chloroform 2941 | Organic Chemical | 15 | Nov 18, 2025 |
| Chromium 1020 | Inorganic Chemical | 24 | Mar 18, 2025 |
| Cis-1,2-Dichloroethylene 2380 | Organic Chemical | 63 | Jul 26, 2022 |
| Coliform (TCR) 3100 | Organism | 1,697 | Aug 4, 2026 |
| Color 1905 | Water Quality | 7 | Apr 7, 2017 |
| Combined Radium (-226 & -228) 4010 | Radionuclide | 9 | Nov 19, 2013 |
| Combined Uranium 4006 | Radionuclide | 11 | Feb 22, 2022 |
| Copper, Free 1022 | Inorganic Chemical | 160 | Aug 6, 2024 |
| Cyanide 1024 | Inorganic Chemical | 28 | Sep 22, 2025 |
| Dibromoacetic Acid 2454 | Organic Chemical | 15 | Nov 18, 2025 |
| Dibromochloromethane 2944 | Organic Chemical | 15 | Nov 18, 2025 |
| Dichloroacetic Acid 2451 | Organic Chemical | 15 | Nov 18, 2025 |
| Dichloromethane 2964 | Organic Chemical | 63 | Jul 26, 2022 |
| E. Coli 3014 | Organism | 555 | Aug 4, 2026 |
| Ethylbenzene 2992 | Organic Chemical | 63 | Jul 26, 2022 |
| Fluoride 1025 | Inorganic Chemical | 31 | Mar 18, 2025 |
| Gross Alpha Particle Activity 4109 | Radionuclide | 2 | Sep 10, 2013 |
| Gross Alpha, Incl. Radon & U 4002 | Radionuclide | 7 | Nov 19, 2013 |
| Hardness, Total (As Caco3) 1915 | Water Quality | 7 | Apr 7, 2017 |
| Iron 1028 | Inorganic Chemical | 7 | Apr 7, 2017 |
| Iron, Field Result FEFD | Inorganic Chemical | 7 | Apr 7, 2017 |
| Lead 1030 | Inorganic Chemical | 160 | Aug 6, 2024 |
| Magnesium 1031 | Inorganic Chemical | 7 | Apr 7, 2017 |
| Manganese 1032 | Inorganic Chemical | 7 | Apr 7, 2017 |
| Mercury 1035 | Inorganic Chemical | 24 | Mar 18, 2025 |
| Monobromoacetic Acid 2453 | Organic Chemical | 15 | Nov 18, 2025 |
| Monochloroacetic Acid 2450 | Organic Chemical | 15 | Nov 18, 2025 |
| Nickel 1036 | Inorganic Chemical | 24 | Mar 18, 2025 |
| Nitrate 1040 | Inorganic Chemical | 65 | Feb 3, 2026 |
| Nitrate-Nitrite 1038 | Inorganic Chemical | 65 | Feb 3, 2026 |
| Nitrite 1041 | Inorganic Chemical | 65 | Feb 3, 2026 |
| O-Dichlorobenzene 2968 | Organic Chemical | 63 | Jul 26, 2022 |
| P-Dichlorobenzene 2969 | Organic Chemical | 63 | Jul 26, 2022 |
| PH, Field Result PHFD | Water Quality | 7 | Apr 7, 2017 |
| Potassium 1042 | Inorganic Chemical | 7 | Apr 7, 2017 |
| Radium-226 4020 | Radionuclide | 9 | Nov 19, 2013 |
| Radium-228 4030 | Radionuclide | 9 | Nov 19, 2013 |
| Residue, Total, Filterable 1057 | Water Quality | 7 | Apr 7, 2017 |
| Selenium 1045 | Inorganic Chemical | 24 | Mar 18, 2025 |
| Sodium 1052 | Inorganic Chemical | 16 | Feb 25, 2025 |
| Styrene 2996 | Organic Chemical | 63 | Jul 26, 2022 |
| Sulfate 1055 | Inorganic Chemical | 11 | Apr 7, 2017 |
| Tetrachloroethylene 2987 | Organic Chemical | 63 | Jul 26, 2022 |
| Thallium, Total 1085 | Inorganic Chemical | 24 | Mar 18, 2025 |
| Toluene 2991 | Organic Chemical | 63 | Jul 26, 2022 |
| Total Haloacetic Acids (Haa5) 2456 | Organic Chemical | 20 | Nov 18, 2025 |
| Trans-1,2-Dichloroethylene 2979 | Organic Chemical | 63 | Jul 26, 2022 |
| Trichloroacetic Acid 2452 | Organic Chemical | 15 | Nov 18, 2025 |
| Trichloroethylene 2984 | Organic Chemical | 63 | Jul 26, 2022 |
| TTHM 2950 | Organic Chemical | 20 | Nov 18, 2025 |
| Uranium-238 4009 | Radionuclide | 1 | Mar 8, 2006 |
| Vinyl Chloride 2976 | Organic Chemical | 63 | Jul 26, 2022 |
| Xylenes, Total 2955 | Organic Chemical | 63 | Jul 26, 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.