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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

MS0110004 , Pattison W/A-West

32 of the 64 analytes this system has been tested for have been detected at least once, across 277 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 277 samples on record, detections range from November 23, 1993 to March 12, 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 Pattison W/A-West, 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 155 of 173 results Nov 23, 1993 Jul 12, 2023
Lead 1030 Inorganic Chemical 106 of 173 results Nov 23, 1993 Jul 12, 2023
Barium 1010 Inorganic Chemical 16 of 16 results Mar 26, 2002 Jan 29, 2025
Fluoride 1025 Inorganic Chemical 13 of 19 results Mar 26, 2002 Oct 11, 2021
Nickel 1036 Inorganic Chemical 12 of 16 results Mar 26, 2002 Jan 29, 2025
Chromium 1020 Inorganic Chemical 9 of 16 results Jan 28, 2004 Jan 29, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 8 of 9 results Jul 11, 2007 Mar 12, 2025
Sulfate 1055 Inorganic Chemical 7 of 7 results Mar 26, 2002 Oct 11, 2021
Gross Alpha, Incl. Radon & U 4002 Radionuclide 7 of 7 results Dec 5, 2011 Jul 12, 2012
Combined Radium (-226 & -228) 4010 Radionuclide 7 of 9 results Dec 5, 2011 Jul 12, 2012
Radium-228 4030 Radionuclide 7 of 9 results Dec 5, 2011 Jul 12, 2012
Sodium 1052 Inorganic Chemical 6 of 6 results Sep 18, 2019 Oct 28, 2024
TTHM 2950 Organic Chemical 6 of 9 results May 10, 2004 Jul 18, 2018
Chloroform 2941 Organic Chemical 5 of 5 results Jul 11, 2007 Jul 18, 2018
Bromodichloromethane 2943 Organic Chemical 5 of 5 results Jul 11, 2007 Jul 18, 2018
Dibromochloromethane 2944 Organic Chemical 5 of 5 results Jul 11, 2007 Jul 18, 2018
Selenium 1045 Inorganic Chemical 5 of 16 results Feb 14, 2005 May 7, 2008
Dichloroacetic Acid 2451 Organic Chemical 4 of 4 results Aug 13, 2008 Jul 18, 2018
Cadmium 1015 Inorganic Chemical 4 of 16 results Feb 14, 2005 Jan 23, 2006
Calcium 1016 Inorganic Chemical 3 of 3 results Oct 11, 2021 Oct 11, 2021
Chloride 1017 Inorganic Chemical 3 of 3 results Oct 11, 2021 Oct 11, 2021
Conductivity @ 25 C Umhos/CM 1064 Water Quality 3 of 3 results Oct 11, 2021 Oct 11, 2021
Alkalinity, Total 1927 Water Quality 3 of 3 results Oct 11, 2021 Oct 11, 2021
Color 1905 Water Quality 2 of 3 results Oct 11, 2021 Oct 11, 2021
Dibromoacetic Acid 2454 Organic Chemical 2 of 4 results Jul 11, 2012 Jul 18, 2018
Bromoform 2942 Organic Chemical 2 of 5 results Jul 11, 2007 Jul 18, 2018
Arsenic 1005 Inorganic Chemical 1 of 16 results Jan 29, 2025 Jan 29, 2025
Nitrate-Nitrite 1038 Inorganic Chemical 1 of 27 results Jan 22, 2018 Jan 22, 2018
Nitrate 1040 Inorganic Chemical 1 of 27 results Jan 22, 2018 Jan 22, 2018
Trichloroacetic Acid 2452 Organic Chemical 1 of 4 results Aug 18, 2014 Aug 18, 2014
Monochloroacetic Acid 2450 Organic Chemical 1 of 4 results Aug 13, 2008 Aug 13, 2008
Beryllium, Total 1075 Inorganic Chemical 1 of 16 results Feb 3, 2004 Feb 3, 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 91–100 of 277 samples, newest first — collected March 20, 2012 to July 11, 2012. The summary above covers all 277.

58 results from the 10 samples listed here: 16 detected, 42 not detected. Across the whole record it is 411 of 982. A sample is analysed for many analytes at once, so one sample appears on as many rows as it had results.

Units in this table

Combined Uranium is recorded on this page in ug/l and mg/l. 1 mg/l = 1,000 ug/l.

Chemical and radiological sample results for Pattison W/A-West, every result from 91 to 100 of 277 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 11, 2012 12:25
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
120712-003TH
Laboratory
MSDH Lab
3.48 ug/l , sample collected Jul 11, 2012 12:25, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 11, 2012 12:25, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
3.71 ug/l , sample collected Jul 11, 2012 12:25, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
3.21 ug/l , sample collected Jul 11, 2012 12:25, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
10.4 ug/l , sample collected Jul 11, 2012 12:25, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2011 – Dec 31, 2013
Collected
Jul 11, 2012 15:35
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120712-040RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 15:35, sampling point TF080 Combined Uranium 4006 EPA method 200.8 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 11, 2012 12:24
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
120712-003HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 12:24, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.004 mg/l , sample collected Jul 11, 2012 12:24, sampling point MRT000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 12:24, sampling point MRT000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 12:24, sampling point MRT000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
0.002 mg/l , sample collected Jul 11, 2012 12:24, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.006 mg/l , sample collected Jul 11, 2012 12:24, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 Jan 1, 2011 – Dec 31, 2013
Collected
Jun 27, 2012 01:30
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120628-005VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 27, 2012 01:30, sampling point TF080 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 27, 2012 01:30, sampling point TF080 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 27, 2012 01:30, sampling point TF080 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 27, 2012 01:30, sampling point TF080 Dichloromethane 2964 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 27, 2012 01:30, sampling point TF080 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 27, 2012 01:30, sampling point TF080 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 27, 2012 01:30, sampling point TF080 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 27, 2012 01:30, sampling point TF080 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 27, 2012 01:30, sampling point TF080 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 27, 2012 01:30, sampling point TF080 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 27, 2012 01:30, sampling point TF080 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 27, 2012 01:30, sampling point TF080 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 27, 2012 01:30, sampling point TF080 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 27, 2012 01:30, sampling point TF080 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 27, 2012 01:30, sampling point TF080 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 27, 2012 01:30, sampling point TF080 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 27, 2012 01:30, sampling point TF080 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 27, 2012 01:30, sampling point TF080 Benzene 2990 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 27, 2012 01:30, sampling point TF080 Toluene 2991 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 27, 2012 01:30, sampling point TF080 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 27, 2012 01:30, sampling point TF080 Styrene 2996 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Collected
Jun 13, 2012 13:15
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
306179004
Laboratory
Radiation Safety Engineering
1 pci/l , sample collected Jun 13, 2012 13:15, sampling point TF080 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
0.6 pci/l , sample collected Jun 13, 2012 13:15, sampling point TF080 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.175 pci/l Minimum Reporting Level , sample collected Jun 13, 2012 13:15, sampling point TF080 Radium-226 4020 EPA method 903.1 Apr 1, 2012 – Jun 30, 2012
0.6 pci/l , sample collected Jun 13, 2012 13:15, sampling point TF080 Radium-228 4030 EPA method 904.0 Apr 1, 2012 – Jun 30, 2012
Collected
Jun 13, 2012 13:15
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
306179004
Laboratory
Gel Laboratories
Not detected below 2.83 pci/l Minimum Reporting Level , sample collected Jun 13, 2012 13:15, sampling point TF080 Gross Alpha, Excl. Radon & U 4000 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.067 ug/l Minimum Reporting Level , sample collected Jun 13, 2012 13:15, sampling point TF080 Combined Uranium 4006 EPA method 200.8 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.545 pci/l Minimum Reporting Level , sample collected Jun 13, 2012 13:15, sampling point TF080 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.545 pci/l Minimum Reporting Level , sample collected Jun 13, 2012 13:15, sampling point TF080 Radium-226 4020 EPA method 903.1 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.545 pci/l Minimum Reporting Level , sample collected Jun 13, 2012 13:15, sampling point TF080 Radium-228 4030 EPA method 904.0 Apr 1, 2012 – Jun 30, 2012
Not detected below 2.83 pci/l Minimum Reporting Level , sample collected Jun 13, 2012 13:15, sampling point TF080 Gross Alpha Particle Activity 4109 EPA method 900.0 Apr 1, 2012 – Jun 30, 2012
Collected
Apr 18, 2012 12:12
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120419-045
Laboratory
Radiation Safety Engineering
1 pci/l , sample collected Apr 18, 2012 12:12, sampling point TF080 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
0.6 pci/l , sample collected Apr 18, 2012 12:12, sampling point TF080 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.175 pci/l Minimum Reporting Level , sample collected Apr 18, 2012 12:12, sampling point TF080 Radium-226 4020 EPA method 903.1 Apr 1, 2012 – Jun 30, 2012
0.6 pci/l , sample collected Apr 18, 2012 12:12, sampling point TF080 Radium-228 4030 EPA method 904.0 Apr 1, 2012 – Jun 30, 2012
Collected
Apr 18, 2012 12:13
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120419-045RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 18, 2012 12:13, sampling point TF080 Combined Uranium 4006 EPA method 200.8 Apr 1, 2012 – Jun 30, 2012
Collected
Mar 20, 2012 14:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
298080011
Laboratory
Radiation Safety Engineering
1 pci/l , sample collected Mar 20, 2012 14:00, sampling point TF080 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
0.6 pci/l , sample collected Mar 20, 2012 14:00, sampling point TF080 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.175 pci/l Minimum Reporting Level , sample collected Mar 20, 2012 14:00, sampling point TF080 Radium-226 4020 EPA method 903.1 Jan 1, 2012 – Mar 31, 2012
0.6 pci/l , sample collected Mar 20, 2012 14:00, sampling point TF080 Radium-228 4030 EPA method 904.0 Jan 1, 2012 – Mar 31, 2012
Collected
Mar 20, 2012 14:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
298080011
Laboratory
Gel Laboratories
Not detected below 2.39 pci/l Minimum Reporting Level , sample collected Mar 20, 2012 14:00, sampling point TF080 Gross Alpha, Excl. Radon & U 4000 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.67 ug/l Minimum Reporting Level , sample collected Mar 20, 2012 14:00, sampling point TF080 Combined Uranium 4006 EPA method 200.8 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.538 pci/l Minimum Reporting Level , sample collected Mar 20, 2012 14:00, sampling point TF080 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.363 pci/l Minimum Reporting Level , sample collected Mar 20, 2012 14:00, sampling point TF080 Radium-226 4020 EPA method 903.1 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.538 pci/l Minimum Reporting Level , sample collected Mar 20, 2012 14:00, sampling point TF080 Radium-228 4030 EPA method 904.0 Jan 1, 2012 – Mar 31, 2012
Not detected below 2.39 pci/l Minimum Reporting Level , sample collected Mar 20, 2012 14:00, sampling point TF080 Gross Alpha Particle Activity 4109 EPA method 900.0 Jan 1, 2012 – Mar 31, 2012

Routine (10).