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
MS0540004 , Town of Como
24 of the 56 analytes this system has been tested for have been detected at least once, across 201 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 201 samples on record, detections range from October 13, 2003 to February 19, 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.
| Analyte | Kind | Detected in | First detected | Last detected |
|---|---|---|---|---|
| Copper, Free 1022 | Inorganic Chemical | 55 of 55 results | Aug 13, 2007 | Sep 19, 2023 |
| Lead 1030 | Inorganic Chemical | 31 of 55 results | Aug 13, 2007 | Sep 19, 2023 |
| TTHM 2950 | Organic Chemical | 21 of 21 results | Jul 26, 2004 | Feb 19, 2026 |
| Barium 1010 | Inorganic Chemical | 18 of 18 results | Oct 13, 2003 | Mar 26, 2025 |
| Total Haloacetic Acids (Haa5) 2456 | Organic Chemical | 17 of 20 results | Jun 24, 2010 | Feb 19, 2026 |
| Chloroform 2941 | Organic Chemical | 16 of 16 results | Sep 6, 2007 | Feb 19, 2026 |
| Fluoride 1025 | Inorganic Chemical | 16 of 18 results | Oct 13, 2003 | Mar 26, 2025 |
| Bromodichloromethane 2943 | Organic Chemical | 15 of 16 results | Jun 24, 2010 | Feb 19, 2026 |
| Dichloroacetic Acid 2451 | Organic Chemical | 14 of 15 results | Jun 24, 2010 | Feb 19, 2026 |
| Trichloroacetic Acid 2452 | Organic Chemical | 14 of 15 results | Jun 24, 2010 | Feb 19, 2026 |
| Dibromochloromethane 2944 | Organic Chemical | 10 of 16 results | Jun 24, 2010 | Aug 7, 2025 |
| Chromium 1020 | Inorganic Chemical | 10 of 18 results | Oct 13, 2003 | Mar 26, 2025 |
| Gross Alpha, Incl. Radon & U 4002 | Radionuclide | 10 of 10 results | Dec 15, 2011 | Jul 31, 2012 |
| Dibromoacetic Acid 2454 | Organic Chemical | 4 of 15 results | Jun 24, 2010 | Nov 18, 2020 |
| Nickel 1036 | Inorganic Chemical | 3 of 18 results | Oct 23, 2019 | Mar 26, 2025 |
| Bromoform 2942 | Organic Chemical | 3 of 16 results | Jun 24, 2010 | May 29, 2019 |
| Monochloroacetic Acid 2450 | Organic Chemical | 2 of 15 results | Aug 7, 2025 | Aug 7, 2025 |
| Arsenic 1005 | Inorganic Chemical | 2 of 18 results | Oct 23, 2019 | Oct 23, 2019 |
| Sodium 1052 | Inorganic Chemical | 2 of 2 results | Sep 30, 2019 | Sep 30, 2019 |
| Nitrate-Nitrite 1038 | Inorganic Chemical | 2 of 41 results | Nov 20, 2013 | Nov 20, 2013 |
| Nitrate 1040 | Inorganic Chemical | 2 of 41 results | Nov 20, 2013 | Nov 20, 2013 |
| Nitrite 1041 | Inorganic Chemical | 1 of 41 results | Dec 8, 2005 | Dec 8, 2005 |
| Thallium, Total 1085 | Inorganic Chemical | 1 of 18 results | Apr 20, 2005 | Apr 20, 2005 |
| Selenium 1045 | Inorganic Chemical | 1 of 18 results | Oct 13, 2003 | Oct 13, 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 141–150 of 201 samples, newest first — collected October 20, 2010 to September 29, 2011. The summary above covers all 201.
40 results from the 10 samples listed here: 17 detected, 23 not detected. Across the whole record it is 270 of 1,061. A sample is analysed for many analytes at once, so one sample appears on as many rows as it had results.
| Result | Analyte | Monitoring period |
|---|---|---|
|
||
| 0.022 mg/l , sample collected Sep 29, 2011, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
| 0.0011 mg/l , sample collected Sep 29, 2011, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
|
||
| 0.0337 mg/l , sample collected Sep 29, 2011, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
| 0.0011 mg/l , sample collected Sep 29, 2011, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
|
||
| 0.0315 mg/l , sample collected Sep 29, 2011, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
| 0.0008 mg/l , sample collected Sep 29, 2011, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
|
||
| 0.0312 mg/l , sample collected Sep 29, 2011, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
| 0.001 mg/l , sample collected Sep 29, 2011, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
|
||
| 0.0099 mg/l , sample collected Sep 29, 2011, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 29, 2011, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
|
||
| 0.0154 mg/l , sample collected Sep 28, 2011, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
| 0.0005 mg/l , sample collected Sep 28, 2011, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
|
||
| Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 9, 2011, sampling point TF101 | Nitrate-Nitrite 1038 EPA method 353.2 | Jan 1, 2011 – Dec 31, 2011 |
| Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 9, 2011, sampling point TF101 | Nitrate 1040 EPA method 353.2 | Jan 1, 2011 – Dec 31, 2011 |
| Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 9, 2011, sampling point TF101 | Nitrite 1041 EPA method 353.2 | Jan 1, 2011 – Dec 31, 2011 |
|
||
| Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 9, 2011, sampling point TF102 | Nitrate-Nitrite 1038 EPA method 353.2 | Jan 1, 2011 – Dec 31, 2011 |
| Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 9, 2011, sampling point TF102 | Nitrate 1040 EPA method 353.2 | Jan 1, 2011 – Dec 31, 2011 |
| Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 9, 2011, sampling point TF102 | Nitrite 1041 EPA method 353.2 | Jan 1, 2011 – Dec 31, 2011 |
|
||
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 20, 2010, sampling point TF102 | Arsenic 1005 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2010 |
| 0.009794 mg/l , sample collected Oct 20, 2010, sampling point TF102 | Barium 1010 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 20, 2010, sampling point TF102 | Cadmium 1015 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2010 |
| 0.000652 mg/l , sample collected Oct 20, 2010, sampling point TF102 | Chromium 1020 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2010 |
| 0.132 mg/l , sample collected Oct 20, 2010, sampling point TF102 | Fluoride 1025 EPA method 380-75WE | Jan 1, 2008 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 20, 2010, sampling point TF102 | Mercury 1035 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 20, 2010, sampling point TF102 | Nickel 1036 EPA method 200.8 | Not recorded |
| Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Oct 20, 2010, sampling point TF102 | Selenium 1045 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 20, 2010, sampling point TF102 | Antimony, Total 1074 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 20, 2010, sampling point TF102 | Beryllium, Total 1075 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 20, 2010, sampling point TF102 | Thallium, Total 1085 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2010 |
|
||
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 20, 2010, sampling point TF101 | Arsenic 1005 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2010 |
| 0.009439 mg/l , sample collected Oct 20, 2010, sampling point TF101 | Barium 1010 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 20, 2010, sampling point TF101 | Cadmium 1015 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2010 |
| 0.000879 mg/l , sample collected Oct 20, 2010, sampling point TF101 | Chromium 1020 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2010 |
| 0.128 mg/l , sample collected Oct 20, 2010, sampling point TF101 | Fluoride 1025 EPA method 380-75WE | Jan 1, 2008 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 20, 2010, sampling point TF101 | Mercury 1035 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 20, 2010, sampling point TF101 | Nickel 1036 EPA method 200.8 | Not recorded |
| Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Oct 20, 2010, sampling point TF101 | Selenium 1045 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 20, 2010, sampling point TF101 | Antimony, Total 1074 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 20, 2010, sampling point TF101 | Beryllium, Total 1075 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 20, 2010, sampling point TF101 | Thallium, Total 1085 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2010 |
-
- Collected
- Sep 29, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110930-117PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2009 – Dec 31, 2011
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.022 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0011 mg/l
-
- Collected
- Sep 29, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110930-116PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2009 – Dec 31, 2011
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0337 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0011 mg/l
-
- Collected
- Sep 29, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110930-115PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2009 – Dec 31, 2011
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0315 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0008 mg/l
-
- Collected
- Sep 29, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110930-122PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2009 – Dec 31, 2011
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0312 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.001 mg/l
-
- Collected
- Sep 29, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110930-114PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2009 – Dec 31, 2011
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0099 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Sep 28, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110930-120PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2009 – Dec 31, 2011
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0154 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0005 mg/l
-
- Collected
- Mar 9, 2011
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- 110310-046NI
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2011 – Dec 31, 2011
-
Nitrate-Nitrite 1038 EPA method 353.2
- Result
- Not detected below 0.1 mg/l Minimum Reporting Level
-
Nitrate 1040 EPA method 353.2
- Result
- Not detected below 0.08 mg/l Minimum Reporting Level
-
Nitrite 1041 EPA method 353.2
- Result
- Not detected below 0.02 mg/l Minimum Reporting Level
-
- Collected
- Mar 9, 2011
- Sampling point
- TF102 Treatment Plant T102
- Sample type
- Routine
- Lab sample
- 110310-043NI
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2011 – Dec 31, 2011
-
Nitrate-Nitrite 1038 EPA method 353.2
- Result
- Not detected below 0.1 mg/l Minimum Reporting Level
-
Nitrate 1040 EPA method 353.2
- Result
- Not detected below 0.08 mg/l Minimum Reporting Level
-
Nitrite 1041 EPA method 353.2
- Result
- Not detected below 0.02 mg/l Minimum Reporting Level
-
- Collected
- Oct 20, 2010
- Sampling point
- TF102 Treatment Plant T102
- Sample type
- Routine
- Lab sample
- 101021-013IN
- Laboratory
- MSDH Lab
-
Arsenic 1005 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2008 – Dec 31, 2010
-
Barium 1010 EPA method 200.8
- Result
- 0.009794 mg/l
- Monitoring period
- Jan 1, 2008 – Dec 31, 2010
-
Cadmium 1015 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2008 – Dec 31, 2010
-
Chromium 1020 EPA method 200.8
- Result
- 0.000652 mg/l
- Monitoring period
- Jan 1, 2008 – Dec 31, 2010
-
Fluoride 1025 EPA method 380-75WE
- Result
- 0.132 mg/l
- Monitoring period
- Jan 1, 2008 – Dec 31, 2010
-
Mercury 1035 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2008 – Dec 31, 2010
-
Nickel 1036 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Selenium 1045 EPA method 200.8
- Result
- Not detected below 0.0025 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2008 – Dec 31, 2010
-
Antimony, Total 1074 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2008 – Dec 31, 2010
-
Beryllium, Total 1075 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2008 – Dec 31, 2010
-
Thallium, Total 1085 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2008 – Dec 31, 2010
-
- Collected
- Oct 20, 2010
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- 101021-012IN
- Laboratory
- MSDH Lab
-
Arsenic 1005 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2008 – Dec 31, 2010
-
Barium 1010 EPA method 200.8
- Result
- 0.009439 mg/l
- Monitoring period
- Jan 1, 2008 – Dec 31, 2010
-
Cadmium 1015 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2008 – Dec 31, 2010
-
Chromium 1020 EPA method 200.8
- Result
- 0.000879 mg/l
- Monitoring period
- Jan 1, 2008 – Dec 31, 2010
-
Fluoride 1025 EPA method 380-75WE
- Result
- 0.128 mg/l
- Monitoring period
- Jan 1, 2008 – Dec 31, 2010
-
Mercury 1035 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2008 – Dec 31, 2010
-
Nickel 1036 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Selenium 1045 EPA method 200.8
- Result
- Not detected below 0.0025 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2008 – Dec 31, 2010
-
Antimony, Total 1074 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2008 – Dec 31, 2010
-
Beryllium, Total 1075 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2008 – Dec 31, 2010
-
Thallium, Total 1085 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2008 – Dec 31, 2010
Routine (10).