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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.

Chemical and radiological sample results

MS0450016 , West Madison Utl Dist

40 of the 72 analytes this system has been tested for have been detected at least once, across 207 samples on record.

The other 32 were tested for and never found. An analyte is counted here if any result on record measured it, so this covers the whole history and not the samples listed below.

Across all 207 samples on record, detections range from October 6, 2003 to June 25, 2026. These figures cover the whole record.

What counts as a non-detect is defined in the help: Less than Indicator. This system’s violations.

What has been detected, ever

Every analyte measured above its reporting level at any point in this system’s record, most often detected first. This is not limited to the samples listed below.

Every analyte ever detected for West Madison Utl Dist, with how many results found it and when it was first and last detected. Covers the whole record, not only the samples listed below.
Analyte Kind Detected in First detected Last detected
Copper, Free 1022 Inorganic Chemical 55 of 55 results Jul 12, 2007 Sep 21, 2023
Lead 1030 Inorganic Chemical 40 of 55 results Jul 12, 2007 Sep 21, 2023
Barium 1010 Inorganic Chemical 22 of 22 results Oct 6, 2003 Jun 23, 2026
TTHM 2950 Organic Chemical 20 of 25 results Jul 12, 2004 Jun 25, 2026
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 17 of 25 results Sep 29, 2010 Jun 25, 2026
Fluoride 1025 Inorganic Chemical 17 of 23 results Oct 6, 2003 Jun 23, 2026
Chloroform 2941 Organic Chemical 15 of 19 results Aug 30, 2007 Jun 25, 2026
Bromodichloromethane 2943 Organic Chemical 14 of 20 results Sep 29, 2010 Jun 25, 2026
Chromium 1020 Inorganic Chemical 14 of 22 results Oct 6, 2003 Apr 29, 2020
Trichloroacetic Acid 2452 Organic Chemical 13 of 20 results Sep 29, 2010 Jun 25, 2026
Dichloroacetic Acid 2451 Organic Chemical 12 of 20 results Sep 29, 2010 Jun 25, 2026
Sulfate 1055 Inorganic Chemical 7 of 7 results Oct 6, 2003 Feb 13, 2018
Sodium 1052 Inorganic Chemical 6 of 6 results Feb 13, 2018 Jun 23, 2026
Dibromochloromethane 2944 Organic Chemical 6 of 20 results Sep 6, 2013 May 5, 2025
Nickel 1036 Inorganic Chemical 6 of 21 results Mar 10, 2004 Mar 25, 2020
Gross Alpha, Incl. Radon & U 4002 Radionuclide 5 of 5 results Dec 15, 2011 Jul 17, 2012
Nitrate-Nitrite 1038 Inorganic Chemical 2 of 31 results Dec 9, 2009 Apr 8, 2015
Nitrate 1040 Inorganic Chemical 2 of 31 results Dec 9, 2009 Apr 8, 2015
Selenium 1045 Inorganic Chemical 2 of 22 results Mar 10, 2004 Mar 10, 2010
Monobromoacetic Acid 2453 Organic Chemical 1 of 20 results Sep 15, 2020 Sep 15, 2020
Xylenes, Total 2955 Organic Chemical 1 of 30 results May 20, 2020 May 20, 2020
Calcium 1016 Inorganic Chemical 1 of 1 result Feb 13, 2018 Feb 13, 2018
Chloride 1017 Inorganic Chemical 1 of 1 result Feb 13, 2018 Feb 13, 2018
Iron 1028 Inorganic Chemical 1 of 1 result Feb 13, 2018 Feb 13, 2018
Magnesium 1031 Inorganic Chemical 1 of 1 result Feb 13, 2018 Feb 13, 2018
Manganese 1032 Inorganic Chemical 1 of 1 result Feb 13, 2018 Feb 13, 2018
Potassium 1042 Inorganic Chemical 1 of 1 result Feb 13, 2018 Feb 13, 2018
Residue, Total, Filterable 1057 Water Quality 1 of 1 result Feb 13, 2018 Feb 13, 2018
Carbon Dioxide 1901 Water Quality 1 of 1 result Feb 13, 2018 Feb 13, 2018
Color 1905 Water Quality 1 of 1 result Feb 13, 2018 Feb 13, 2018
Hardness, Total (As Caco3) 1915 Water Quality 1 of 1 result Feb 13, 2018 Feb 13, 2018
Alkalinity, Total 1927 Water Quality 1 of 1 result Feb 13, 2018 Feb 13, 2018
Iron, Field Result FEFD Inorganic Chemical 1 of 1 result Feb 13, 2018 Feb 13, 2018
Calculated Sodium NACA Water Quality 1 of 1 result Feb 13, 2018 Feb 13, 2018
PH, Field Result PHFD Water Quality 1 of 1 result Feb 13, 2018 Feb 13, 2018
Combined Radium (-226 & -228) 4010 Radionuclide 1 of 7 results Dec 12, 2012 Dec 12, 2012
Radium-226 4020 Radionuclide 1 of 7 results Dec 12, 2012 Dec 12, 2012
Gross Alpha Particle Activity 4109 Radionuclide 1 of 2 results Dec 12, 2012 Dec 12, 2012
Cyanide 1024 Inorganic Chemical 1 of 15 results Dec 5, 2007 Dec 5, 2007
Dichloromethane 2964 Organic Chemical 1 of 30 results Aug 17, 2004 Aug 17, 2004

No date range is applied: this list draws on every sample on record. Show the last two years only.

The most recent samples, result by result

The table below lists 31–40 of 207 samples, newest first — collected June 30, 2022 to September 21, 2023. The summary above covers all 207.

56 results from the 10 samples listed here: 6 detected, 50 not detected. Across the whole record it is 296 of 1,382. A sample is analysed for many analytes at once, so one sample appears on as many rows as it had results.

We withheld the location of 4 sampling points below. The location on record identifies a private home, and we do not publish those. That is our decision, not the agency’s. The sampling point, its type and every result taken there are published unchanged.

Chemical and radiological sample results for West Madison Utl Dist, every result from 31 to 40 of 207 samples shown, newest first. Not detected means the amount was below the level the laboratory can reliably report, which is given beside it.
Result Analyte Monitoring period
Collected
Sep 21, 2023 07:35
Sampling point
LC0002 Location withheld
Sample type
Routine
Lab sample
PB-230922-009
Laboratory
MSDH Lab
0.101 mg/l , sample collected Sep 21, 2023 07:35, sampling point LC0002 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
2.13 ug/l , sample collected Sep 21, 2023 07:35, sampling point LC0002 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Sep 21, 2023 07:00
Sampling point
LC0001 Location withheld
Sample type
Routine
Lab sample
PB-230922-008
Laboratory
MSDH Lab
0.0522 mg/l , sample collected Sep 21, 2023 07:00, sampling point LC0001 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 21, 2023 07:00, sampling point LC0001 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Sep 21, 2023 07:30
Sampling point
LC0018 Location withheld
Sample type
Routine
Lab sample
PB-230922-007
Laboratory
MSDH Lab
0.149 mg/l , sample collected Sep 21, 2023 07:30, sampling point LC0018 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 21, 2023 07:30, sampling point LC0018 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Sep 21, 2023 06:50
Sampling point
LC0010 Location withheld
Sample type
Routine
Lab sample
PB-230922-006
Laboratory
MSDH Lab
0.217 mg/l , sample collected Sep 21, 2023 06:50, sampling point LC0010 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
0.518 ug/l , sample collected Sep 21, 2023 06:50, sampling point LC0010 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Jul 12, 2023 07:09
Sampling point
TF104 Treatment Facility TF104
Sample type
Routine
Lab sample
CN-230712-026
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Jul 12, 2023 07:09, sampling point TF104 Cyanide 1024 EPA method QC10204001X Jan 1, 2021 – Dec 31, 2023
Collected
May 4, 2023 09:11
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
HA-230504-042
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected May 4, 2023 09:11, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Not recorded
Collected
May 4, 2023 09:00
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
TH-230504-042
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected May 4, 2023 09:00, sampling point MRT000 TTHM 2950 EPA method 524.2 Not recorded
Collected
Feb 28, 2023 16:30
Sampling point
TF104 Treatment Facility TF104
Sample type
Routine
Lab sample
NI-230301-127
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 28, 2023 16:30, sampling point TF104 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Feb 28, 2023 16:30, sampling point TF104 Nitrate 1040 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 28, 2023 16:30, sampling point TF104 Nitrite 1041 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Collected
Feb 15, 2023 16:02
Sampling point
TF104 Treatment Facility TF104
Sample type
Routine
Lab sample
VO-230216-013
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 15, 2023 16:02, sampling point TF104 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2023 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 15, 2023 16:02, sampling point TF104 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2023 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 15, 2023 16:02, sampling point TF104 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2023 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 15, 2023 16:02, sampling point TF104 Dichloromethane 2964 EPA method 524.2 Jan 1, 2023 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 15, 2023 16:02, sampling point TF104 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2023 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 15, 2023 16:02, sampling point TF104 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2023 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 15, 2023 16:02, sampling point TF104 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2023 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 15, 2023 16:02, sampling point TF104 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2023 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 15, 2023 16:02, sampling point TF104 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2023 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 15, 2023 16:02, sampling point TF104 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2023 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 15, 2023 16:02, sampling point TF104 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2023 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 15, 2023 16:02, sampling point TF104 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2023 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 15, 2023 16:02, sampling point TF104 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2023 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 15, 2023 16:02, sampling point TF104 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2023 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 15, 2023 16:02, sampling point TF104 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2023 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 15, 2023 16:02, sampling point TF104 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2023 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 15, 2023 16:02, sampling point TF104 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2023 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 15, 2023 16:02, sampling point TF104 Benzene 2990 EPA method 524.2 Jan 1, 2023 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 15, 2023 16:02, sampling point TF104 Toluene 2991 EPA method 524.2 Jan 1, 2023 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 15, 2023 16:02, sampling point TF104 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2023 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 15, 2023 16:02, sampling point TF104 Styrene 2996 EPA method 524.2 Jan 1, 2023 – Dec 31, 2023
Collected
Jun 30, 2022 12:40
Sampling point
TF104 Treatment Facility TF104
Sample type
Routine
Lab sample
VO-220701-004
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2022 12:40, sampling point TF104 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2022 12:40, sampling point TF104 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2022 12:40, sampling point TF104 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2022 12:40, sampling point TF104 Dichloromethane 2964 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2022 12:40, sampling point TF104 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2022 12:40, sampling point TF104 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2022 12:40, sampling point TF104 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2022 12:40, sampling point TF104 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2022 12:40, sampling point TF104 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2022 12:40, sampling point TF104 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2022 12:40, sampling point TF104 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2022 12:40, sampling point TF104 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2022 12:40, sampling point TF104 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2022 12:40, sampling point TF104 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2022 12:40, sampling point TF104 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2022 12:40, sampling point TF104 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2022 12:40, sampling point TF104 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2022 12:40, sampling point TF104 Benzene 2990 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2022 12:40, sampling point TF104 Toluene 2991 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2022 12:40, sampling point TF104 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2022 12:40, sampling point TF104 Styrene 2996 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022

Routine (10).