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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

MS0310008 , Montrose Water Association

39 of the 72 analytes this system has been tested for have been detected at least once, across 226 samples on record.

The other 33 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 226 samples on record, detections range from June 9, 2003 to April 1, 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 Montrose 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 53 of 53 results Aug 4, 2004 Aug 20, 2024
Lead 1030 Inorganic Chemical 41 of 53 results Aug 4, 2004 Aug 20, 2024
Barium 1010 Inorganic Chemical 15 of 15 results Sep 24, 2003 Feb 25, 2025
Xylenes, Total 2955 Organic Chemical 12 of 52 results May 7, 2008 Jun 14, 2022
Nickel 1036 Inorganic Chemical 11 of 15 results Feb 23, 2004 Feb 25, 2025
Gross Alpha, Incl. Radon & U 4002 Radionuclide 10 of 10 results Dec 20, 2011 Jul 31, 2012
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 8 of 11 results Aug 7, 2007 Apr 1, 2025
TTHM 2950 Organic Chemical 8 of 10 results Sep 6, 2007 Apr 1, 2025
Sodium 1052 Inorganic Chemical 8 of 8 results May 25, 2017 Feb 4, 2025
Chromium 1020 Inorganic Chemical 7 of 15 results Sep 24, 2003 May 22, 2017
Chloroform 2941 Organic Chemical 4 of 5 results Sep 6, 2007 Aug 7, 2018
Dichloroacetic Acid 2451 Organic Chemical 3 of 5 results Jun 24, 2015 Aug 7, 2018
Bromodichloromethane 2943 Organic Chemical 3 of 5 results Sep 6, 2007 Aug 7, 2018
Sulfate 1055 Inorganic Chemical 3 of 4 results Sep 24, 2003 May 25, 2017
Fluoride 1025 Inorganic Chemical 2 of 17 results May 25, 2017 Jan 10, 2024
Dibromochloromethane 2944 Organic Chemical 2 of 5 results Sep 6, 2007 Aug 7, 2018
Calcium 1016 Inorganic Chemical 2 of 2 results May 25, 2017 May 25, 2017
Chloride 1017 Inorganic Chemical 2 of 2 results May 25, 2017 May 25, 2017
Iron 1028 Inorganic Chemical 2 of 2 results May 25, 2017 May 25, 2017
Magnesium 1031 Inorganic Chemical 2 of 2 results May 25, 2017 May 25, 2017
Manganese 1032 Inorganic Chemical 2 of 2 results May 25, 2017 May 25, 2017
Potassium 1042 Inorganic Chemical 2 of 2 results May 25, 2017 May 25, 2017
Residue, Total, Filterable 1057 Water Quality 2 of 2 results May 25, 2017 May 25, 2017
Alkalinity, Caco3 Stability 1067 Water Quality 2 of 2 results May 25, 2017 May 25, 2017
Carbon Dioxide 1901 Water Quality 2 of 2 results May 25, 2017 May 25, 2017
Color 1905 Water Quality 2 of 2 results May 25, 2017 May 25, 2017
Hardness, Total (As Caco3) 1915 Water Quality 2 of 2 results May 25, 2017 May 25, 2017
Alkalinity, Total 1927 Water Quality 2 of 2 results May 25, 2017 May 25, 2017
Iron, Field Result FEFD Inorganic Chemical 2 of 2 results May 25, 2017 May 25, 2017
Calculated Sodium NACA Water Quality 2 of 2 results May 25, 2017 May 25, 2017
PH, Field Result PHFD Water Quality 2 of 2 results May 25, 2017 May 25, 2017
Ethylbenzene 2992 Organic Chemical 2 of 52 results May 7, 2008 May 7, 2009
Nitrate-Nitrite 1038 Inorganic Chemical 2 of 44 results Jun 9, 2003 Nov 24, 2003
Nitrate 1040 Inorganic Chemical 2 of 44 results Jun 9, 2003 Nov 24, 2003
Monochloroacetic Acid 2450 Organic Chemical 1 of 5 results Aug 7, 2018 Aug 7, 2018
Cyanide 1024 Inorganic Chemical 1 of 15 results May 16, 2017 May 16, 2017
Trichloroacetic Acid 2452 Organic Chemical 1 of 5 results Jun 24, 2015 Jun 24, 2015
Dibromoacetic Acid 2454 Organic Chemical 1 of 5 results Jun 24, 2015 Jun 24, 2015
Nitrite 1041 Inorganic Chemical 1 of 44 results Jun 9, 2003 Jun 9, 2003

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 121–130 of 226 samples, newest first — collected July 11, 2012 to July 30, 2012. The summary above covers all 226.

22 results from the 10 samples listed here: 10 detected, 12 not detected. Across the whole record it is 231 of 1,669. 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 Montrose Water Association, every result from 121 to 130 of 226 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 30, 2012 12:15
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
120731-155
Laboratory
Radiation Safety Engineering
0.8 pci/l , sample collected Jul 30, 2012 12:15, sampling point TF103 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.42 pci/l Minimum Reporting Level , sample collected Jul 30, 2012 12:15, sampling point TF103 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.417 pci/l Minimum Reporting Level , sample collected Jul 30, 2012 12:15, sampling point TF103 Radium-226 4020 EPA method 903.1 Jul 1, 2012 – Sep 30, 2012
Not detected below 0.42 pci/l Minimum Reporting Level , sample collected Jul 30, 2012 12:15, sampling point TF103 Radium-228 4030 EPA method 904.0 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 30, 2012 12:15
Sampling point
TF104
Sample type
Routine
Lab sample
120731-156
Laboratory
Radiation Safety Engineering
0.6 pci/l , sample collected Jul 30, 2012 12:15, sampling point TF104 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.43 pci/l Minimum Reporting Level , sample collected Jul 30, 2012 12:15, sampling point TF104 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.365 pci/l Minimum Reporting Level , sample collected Jul 30, 2012 12:15, sampling point TF104 Radium-226 4020 EPA method 903.1 Jul 1, 2012 – Sep 30, 2012
Not detected below 0.43 pci/l Minimum Reporting Level , sample collected Jul 30, 2012 12:15, sampling point TF104 Radium-228 4030 EPA method 904.0 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 30, 2012 12:15
Sampling point
TF104
Sample type
Routine
Lab sample
120731-156RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 30, 2012 12:15, sampling point TF104 Combined Uranium 4006 EPA method 200.8 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 30, 2012 12:15
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
120731-155RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 30, 2012 12:15, sampling point TF103 Combined Uranium 4006 EPA method 200.8 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 11, 2012 06:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
120712-039PB
Laboratory
MSDH Lab
0.0455 mg/l , sample collected Jul 11, 2012 06:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
0.0009 mg/l , sample collected Jul 11, 2012 06:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
Collected
Jul 11, 2012 07:20
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
120712-038PB
Laboratory
MSDH Lab
0.0295 mg/l , sample collected Jul 11, 2012 07:20, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 07:20, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
Collected
Jul 11, 2012 06:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
120712-037PB
Laboratory
MSDH Lab
0.0084 mg/l , sample collected Jul 11, 2012 06:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 06:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
Collected
Jul 11, 2012 04:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
120712-036PB
Laboratory
MSDH Lab
0.0462 mg/l , sample collected Jul 11, 2012 04:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 04:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
Collected
Jul 11, 2012 07:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
120712-035PB
Laboratory
MSDH Lab
0.0053 mg/l , sample collected Jul 11, 2012 07:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 07:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
Collected
Jul 11, 2012 08:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
120712-034PB
Laboratory
MSDH Lab
0.0096 mg/l , sample collected Jul 11, 2012 08:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
0.0009 mg/l , sample collected Jul 11, 2012 08:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012

Routine (10).