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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

MS0040005 , McAdams Water Association

36 of the 73 analytes this system has been tested for have been detected at least once, across 251 samples on record.

The other 37 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 251 samples on record, detections range from August 16, 1993 to December 17, 2025. 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 McAdams Water Association, 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 71 of 129 results Aug 16, 1993 Sep 23, 2025
Lead 1030 Inorganic Chemical 58 of 129 results Aug 17, 1993 Sep 23, 2025
TTHM 2950 Organic Chemical 18 of 23 results May 3, 2004 Dec 17, 2025
Chloroform 2941 Organic Chemical 12 of 17 results Jun 28, 2007 Dec 17, 2025
Barium 1010 Inorganic Chemical 12 of 12 results Jan 29, 2002 Feb 26, 2025
Bromodichloromethane 2943 Organic Chemical 10 of 17 results Jun 28, 2007 Dec 17, 2025
Nickel 1036 Inorganic Chemical 9 of 12 results Jan 12, 2004 Feb 26, 2025
Dibromochloromethane 2944 Organic Chemical 8 of 17 results Jun 28, 2007 Sep 25, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 6 of 23 results Jun 28, 2007 Mar 12, 2024
Sodium 1052 Inorganic Chemical 5 of 5 results Sep 16, 2008 Oct 30, 2024
Chromium 1020 Inorganic Chemical 5 of 12 results Jan 29, 2002 Nov 6, 2018
Gross Alpha, Incl. Radon & U 4002 Radionuclide 5 of 5 results Dec 13, 2011 Jul 10, 2012
Dichloroacetic Acid 2451 Organic Chemical 4 of 16 results Jul 15, 2008 Sep 25, 2025
Selenium 1045 Inorganic Chemical 3 of 12 results Jan 25, 2005 Mar 19, 2008
Calcium 1016 Inorganic Chemical 2 of 2 results Sep 16, 2008 Sep 16, 2008
Iron 1028 Inorganic Chemical 2 of 2 results Sep 16, 2008 Sep 16, 2008
Magnesium 1031 Inorganic Chemical 2 of 2 results Sep 16, 2008 Sep 16, 2008
Manganese 1032 Inorganic Chemical 2 of 2 results Sep 16, 2008 Sep 16, 2008
Potassium 1042 Inorganic Chemical 2 of 2 results Sep 16, 2008 Sep 16, 2008
Residue, Total, Filterable 1057 Water Quality 2 of 2 results Sep 16, 2008 Sep 16, 2008
Alkalinity, Caco3 Stability 1067 Water Quality 2 of 2 results Sep 16, 2008 Sep 16, 2008
Carbon Dioxide 1901 Water Quality 2 of 2 results Sep 16, 2008 Sep 16, 2008
Color 1905 Water Quality 2 of 2 results Sep 16, 2008 Sep 16, 2008
Hardness, Total (As Caco3) 1915 Water Quality 2 of 2 results Sep 16, 2008 Sep 16, 2008
PH 1925 Water Quality 2 of 2 results Sep 16, 2008 Sep 16, 2008
Alkalinity, Total 1927 Water Quality 2 of 2 results Sep 16, 2008 Sep 16, 2008
Iron, Field Result FEFD Inorganic Chemical 2 of 2 results Sep 16, 2008 Sep 16, 2008
Calculated Sodium NACA Water Quality 2 of 2 results Sep 16, 2008 Sep 16, 2008
PH, Field Result PHFD Water Quality 2 of 2 results Sep 16, 2008 Sep 16, 2008
Fluoride 1025 Inorganic Chemical 2 of 12 results Jan 25, 2005 Mar 19, 2008
Cadmium 1015 Inorganic Chemical 2 of 12 results Jan 25, 2005 Jan 23, 2006
Sulfate 1055 Inorganic Chemical 2 of 2 results Jan 29, 2002 Jan 12, 2004
Xylenes, Total 2955 Organic Chemical 1 of 27 results Sep 26, 2011 Sep 26, 2011
Temperature, Field Result TEMP Water Quality 1 of 1 result Sep 16, 2008 Sep 16, 2008
Nitrate-Nitrite 1038 Inorganic Chemical 1 of 22 results Jul 27, 2005 Jul 27, 2005
Nitrate 1040 Inorganic Chemical 1 of 22 results Jul 27, 2005 Jul 27, 2005

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 111–120 of 251 samples, newest first — collected January 25, 2012 to July 10, 2012. The summary above covers all 251.

64 results from the 10 samples listed here: 4 detected, 60 not detected. Across the whole record it is 266 of 1,289. A sample is analysed for many analytes at once, so one sample appears on as many rows as it had results.

Chemical and radiological sample results for McAdams Water Association, every result from 111 to 120 of 251 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
Jul 10, 2012 15:45
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
201211290068
Laboratory
Radiation Safety Engineering
1 pci/l , sample collected Jul 10, 2012 15:45, sampling point TF080 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.44 pci/l Minimum Reporting Level , sample collected Jul 10, 2012 15:45, sampling point TF080 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.299 pci/l Minimum Reporting Level , sample collected Jul 10, 2012 15:45, sampling point TF080 Radium-226 4020 EPA method 903.1 Jul 1, 2012 – Sep 30, 2012
Not detected below 0.44 pci/l Minimum Reporting Level , sample collected Jul 10, 2012 15:45, sampling point TF080 Radium-228 4030 EPA method 904.0 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 9, 2012 09:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120710-079
Laboratory
Radiation Safety Engineering
1 pci/l , sample collected Jul 9, 2012 09:00, sampling point TF080 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.44 pci/l Minimum Reporting Level , sample collected Jul 9, 2012 09:00, sampling point TF080 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.299 pci/l Minimum Reporting Level , sample collected Jul 9, 2012 09:00, sampling point TF080 Radium-226 4020 EPA method 903.1 Jul 1, 2012 – Sep 30, 2012
Not detected below 0.44 pci/l Minimum Reporting Level , sample collected Jul 9, 2012 09:00, sampling point TF080 Radium-228 4030 EPA method 904.0 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 9, 2012 09:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120710-079RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 9, 2012 09:00, sampling point TF080 Combined Uranium 4006 EPA method 200.8 Jul 1, 2012 – Sep 30, 2012
Collected
Apr 19, 2012 15:15
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120420-006
Laboratory
Radiation Safety Engineering
1 pci/l , sample collected Apr 19, 2012 15:15, sampling point TF080 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.44 pci/l Minimum Reporting Level , sample collected Apr 19, 2012 15:15, sampling point TF080 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.299 pci/l Minimum Reporting Level , sample collected Apr 19, 2012 15:15, sampling point TF080 Radium-226 4020 EPA method 903.1 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.44 pci/l Minimum Reporting Level , sample collected Apr 19, 2012 15:15, sampling point TF080 Radium-228 4030 EPA method 904.0 Apr 1, 2012 – Jun 30, 2012
Collected
Apr 19, 2012 15:15
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120420-006RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 19, 2012 15:15, sampling point TF080 Combined Uranium 4006 EPA method 200.8 Apr 1, 2012 – Jun 30, 2012
Collected
Apr 5, 2012 03:45
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120406-012VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 5, 2012 03:45, sampling point TF080 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 5, 2012 03:45, sampling point TF080 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 5, 2012 03:45, sampling point TF080 Xylenes, Total 2955 EPA method 524.2 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 5, 2012 03:45, sampling point TF080 Dichloromethane 2964 EPA method 524.2 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 5, 2012 03:45, sampling point TF080 O-Dichlorobenzene 2968 EPA method 524.2 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 5, 2012 03:45, sampling point TF080 P-Dichlorobenzene 2969 EPA method 524.2 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 5, 2012 03:45, sampling point TF080 Vinyl Chloride 2976 EPA method 524.2 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 5, 2012 03:45, sampling point TF080 1,1-Dichloroethylene 2977 EPA method 524.2 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 5, 2012 03:45, sampling point TF080 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 5, 2012 03:45, sampling point TF080 1,2-Dichloroethane 2980 EPA method 524.2 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 5, 2012 03:45, sampling point TF080 1,1,1-Trichloroethane 2981 EPA method 524.2 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 5, 2012 03:45, sampling point TF080 Carbon Tetrachloride 2982 EPA method 524.2 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 5, 2012 03:45, sampling point TF080 1,2-Dichloropropane 2983 EPA method 524.2 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 5, 2012 03:45, sampling point TF080 Trichloroethylene 2984 EPA method 524.2 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 5, 2012 03:45, sampling point TF080 1,1,2-Trichloroethane 2985 EPA method 524.2 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 5, 2012 03:45, sampling point TF080 Tetrachloroethylene 2987 EPA method 524.2 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 5, 2012 03:45, sampling point TF080 Chlorobenzene 2989 EPA method 524.2 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 5, 2012 03:45, sampling point TF080 Benzene 2990 EPA method 524.2 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 5, 2012 03:45, sampling point TF080 Toluene 2991 EPA method 524.2 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 5, 2012 03:45, sampling point TF080 Ethylbenzene 2992 EPA method 524.2 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 5, 2012 03:45, sampling point TF080 Styrene 2996 EPA method 524.2 Apr 1, 2012 – Jun 30, 2012
Collected
Feb 14, 2012 13:30
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120215-079
Laboratory
Radiation Safety Engineering
1 pci/l , sample collected Feb 14, 2012 13:30, sampling point TF080 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.44 pci/l Minimum Reporting Level , sample collected Feb 14, 2012 13:30, sampling point TF080 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.299 pci/l Minimum Reporting Level , sample collected Feb 14, 2012 13:30, sampling point TF080 Radium-226 4020 EPA method 903.1 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.44 pci/l Minimum Reporting Level , sample collected Feb 14, 2012 13:30, sampling point TF080 Radium-228 4030 EPA method 904.0 Jan 1, 2012 – Mar 31, 2012
Collected
Feb 14, 2012 13:30
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120215-079RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 14, 2012 13:30, sampling point TF080 Combined Uranium 4006 EPA method 200.8 Jan 1, 2012 – Mar 31, 2012
Collected
Jan 25, 2012 09:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120126-024NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 25, 2012 09:00, sampling point TF080 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 25, 2012 09:00, sampling point TF080 Nitrate 1040 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 25, 2012 09:00, sampling point TF080 Nitrite 1041 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Collected
Jan 25, 2012 09:15
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120126-003VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 25, 2012 09:15, sampling point TF080 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 25, 2012 09:15, sampling point TF080 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 25, 2012 09:15, sampling point TF080 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 25, 2012 09:15, sampling point TF080 Dichloromethane 2964 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 25, 2012 09:15, sampling point TF080 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 25, 2012 09:15, sampling point TF080 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 25, 2012 09:15, sampling point TF080 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 25, 2012 09:15, sampling point TF080 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 25, 2012 09:15, sampling point TF080 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 25, 2012 09:15, sampling point TF080 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 25, 2012 09:15, sampling point TF080 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 25, 2012 09:15, sampling point TF080 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 25, 2012 09:15, sampling point TF080 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 25, 2012 09:15, sampling point TF080 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 25, 2012 09:15, sampling point TF080 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 25, 2012 09:15, sampling point TF080 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 25, 2012 09:15, sampling point TF080 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 25, 2012 09:15, sampling point TF080 Benzene 2990 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 25, 2012 09:15, sampling point TF080 Toluene 2991 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 25, 2012 09:15, sampling point TF080 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 25, 2012 09:15, sampling point TF080 Styrene 2996 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012

Routine (10).