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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 51–60 of 226 samples, newest first — collected October 28, 2019 to May 4, 2021. The summary above covers all 226.

70 results from the 10 samples listed here: 4 detected, 66 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 51 to 60 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
May 4, 2021 12:30
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
RU-210505-008
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 4, 2021 12:30, sampling point TF103 Combined Uranium 4006 EPA method 200.8 Jan 1, 2013 – Dec 31, 2021
Collected
Mar 8, 2021 15:45
Sampling point
TF104
Sample type
Routine
Lab sample
NI-210309-081
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 8, 2021 15:45, sampling point TF104 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2021 – Dec 31, 2021
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 8, 2021 15:45, sampling point TF104 Nitrate 1040 EPA method QC10107041C Jan 1, 2021 – Dec 31, 2021
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 8, 2021 15:45, sampling point TF104 Nitrite 1041 EPA method QC10107041C Jan 1, 2021 – Dec 31, 2021
Collected
Mar 8, 2021 15:44
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
NI-210309-080
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 8, 2021 15:44, sampling point TF103 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2021 – Dec 31, 2021
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 8, 2021 15:44, sampling point TF103 Nitrate 1040 EPA method QC10107041C Jan 1, 2021 – Dec 31, 2021
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 8, 2021 15:44, sampling point TF103 Nitrite 1041 EPA method QC10107041C Jan 1, 2021 – Dec 31, 2021
Collected
Feb 9, 2021 13:25
Sampling point
TF104
Sample type
Routine
Lab sample
CN-210210-001
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Feb 9, 2021 13:25, sampling point TF104 Cyanide 1024 EPA method QC10204001X Jan 1, 2019 – Dec 31, 2021
Collected
Apr 21, 2020 13:30
Sampling point
TF104
Sample type
Routine
Lab sample
200422-022IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 21, 2020 13:30, sampling point TF104 Arsenic 1005 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
0.0223 mg/l , sample collected Apr 21, 2020 13:30, sampling point TF104 Barium 1010 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 21, 2020 13:30, sampling point TF104 Cadmium 1015 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 21, 2020 13:30, sampling point TF104 Chromium 1020 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 21, 2020 13:30, sampling point TF104 Fluoride 1025 EPA method QC 10-109-12-2-A Jan 1, 2019 – Dec 31, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 21, 2020 13:30, sampling point TF104 Mercury 1035 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
0.0012 mg/l , sample collected Apr 21, 2020 13:30, sampling point TF104 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 21, 2020 13:30, sampling point TF104 Selenium 1045 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 21, 2020 13:30, sampling point TF104 Antimony, Total 1074 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 21, 2020 13:30, sampling point TF104 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 21, 2020 13:30, sampling point TF104 Thallium, Total 1085 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Collected
Apr 21, 2020 01:15
Sampling point
TF104
Sample type
Routine
Lab sample
200422-006VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF104 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF104 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
1.257 ug/l , sample collected Apr 21, 2020 01:15, sampling point TF104 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF104 Dichloromethane 2964 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF104 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF104 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF104 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF104 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF104 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF104 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF104 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF104 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF104 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF104 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF104 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF104 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF104 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF104 Benzene 2990 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF104 Toluene 2991 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF104 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF104 Styrene 2996 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Collected
Apr 21, 2020 01:15
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
200422-005VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF103 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF103 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
1.306 ug/l , sample collected Apr 21, 2020 01:15, sampling point TF103 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF103 Dichloromethane 2964 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF103 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF103 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF103 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF103 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF103 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF103 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF103 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF103 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF103 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF103 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF103 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF103 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF103 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF103 Benzene 2990 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF103 Toluene 2991 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF103 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 21, 2020 01:15, sampling point TF103 Styrene 2996 EPA method 524.2 Jan 1, 2020 – Dec 31, 2020
Collected
Feb 25, 2020 13:05
Sampling point
TF104
Sample type
Routine
Lab sample
200226-052NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 25, 2020 13:05, sampling point TF104 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2020 – Dec 31, 2020
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Feb 25, 2020 13:05, sampling point TF104 Nitrate 1040 EPA method QC10107041C Jan 1, 2020 – Dec 31, 2020
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 25, 2020 13:05, sampling point TF104 Nitrite 1041 EPA method QC10107041C Jan 1, 2020 – Dec 31, 2020
Collected
Feb 25, 2020 13:00
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
200226-051NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 25, 2020 13:00, sampling point TF103 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2020 – Dec 31, 2020
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Feb 25, 2020 13:00, sampling point TF103 Nitrate 1040 EPA method QC10107041C Jan 1, 2020 – Dec 31, 2020
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 25, 2020 13:00, sampling point TF103 Nitrite 1041 EPA method QC10107041C Jan 1, 2020 – Dec 31, 2020
Collected
Oct 28, 2019 13:30
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
191029-029NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Oct 28, 2019 13:30, sampling point TF103 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2019 – Dec 31, 2019
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Oct 28, 2019 13:30, sampling point TF103 Nitrate 1040 EPA method QC10107041C Jan 1, 2019 – Dec 31, 2019
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Oct 28, 2019 13:30, sampling point TF103 Nitrite 1041 EPA method QC10107041C Jan 1, 2019 – Dec 31, 2019

Routine (10).