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 131–140 of 201 samples, newest first — collected September 29, 2011 to February 28, 2012. The summary above covers all 201.
26 results from the 10 samples listed here: 10 detected, 16 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 |
|---|---|---|
|
||
| 0.4 pci/l , sample collected Feb 28, 2012 12:15, sampling point TF102 | Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 | Not recorded |
| Not detected below 0.425 pci/l Minimum Reporting Level , sample collected Feb 28, 2012 12:15, sampling point TF102 | Combined Radium (-226 & -228) 4010 | Not recorded |
| Not detected below 0.425 pci/l Minimum Reporting Level , sample collected Feb 28, 2012 12:15, sampling point TF102 | Radium-226 4020 EPA method 903.1 | Jan 1, 2012 – Mar 31, 2012 |
| Not detected below 0.31 pci/l Minimum Reporting Level , sample collected Feb 28, 2012 12:15, sampling point TF102 | Radium-228 4030 EPA method 904.0 | Jan 1, 2012 – Mar 31, 2012 |
|
||
| 0.4 pci/l , sample collected Feb 28, 2012 12:22, sampling point TF101 | Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 | Not recorded |
| Not detected below 0.405 pci/l Minimum Reporting Level , sample collected Feb 28, 2012 12:22, sampling point TF101 | Combined Radium (-226 & -228) 4010 | Not recorded |
| Not detected below 0.405 pci/l Minimum Reporting Level , sample collected Feb 28, 2012 12:22, sampling point TF101 | Radium-226 4020 EPA method 903.1 | Jan 1, 2012 – Mar 31, 2012 |
| Not detected below 0.35 pci/l Minimum Reporting Level , sample collected Feb 28, 2012 12:22, sampling point TF101 | Radium-228 4030 EPA method 904.0 | Jan 1, 2012 – Mar 31, 2012 |
|
||
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 28, 2012 12:16, sampling point TF102 | Combined Uranium 4006 EPA method 200.8 | Jan 1, 2012 – Mar 31, 2012 |
|
||
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 28, 2012 12:23, sampling point TF101 | Combined Uranium 4006 EPA method 200.8 | Jan 1, 2012 – Mar 31, 2012 |
|
||
| 0.4 pci/l , sample collected Dec 19, 2011 12:08, sampling point TF102 | Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 | Not recorded |
| Not detected below 0.425 pci/l Minimum Reporting Level , sample collected Dec 19, 2011 12:08, sampling point TF102 | Combined Radium (-226 & -228) 4010 | Not recorded |
| Not detected below 0.425 pci/l Minimum Reporting Level , sample collected Dec 19, 2011 12:08, sampling point TF102 | Radium-226 4020 EPA method 903.1 | Oct 1, 2011 – Dec 31, 2011 |
| Not detected below 0.31 pci/l Minimum Reporting Level , sample collected Dec 19, 2011 12:08, sampling point TF102 | Radium-228 4030 EPA method 904.0 | Oct 1, 2011 – Dec 31, 2011 |
|
||
| 0.4 pci/l , sample collected Dec 15, 2011 13:20, sampling point TF101 | Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 | Not recorded |
| Not detected below 0.405 pci/l Minimum Reporting Level , sample collected Dec 15, 2011 13:20, sampling point TF101 | Combined Radium (-226 & -228) 4010 | Not recorded |
| Not detected below 0.405 pci/l Minimum Reporting Level , sample collected Dec 15, 2011 13:20, sampling point TF101 | Radium-226 4020 EPA method 903.1 | Oct 1, 2011 – Dec 31, 2011 |
| Not detected below 0.35 pci/l Minimum Reporting Level , sample collected Dec 15, 2011 13:20, sampling point TF101 | Radium-228 4030 EPA method 904.0 | Oct 1, 2011 – Dec 31, 2011 |
|
||
| 0.0061 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 |
|
||
| 0.0066 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 |
|
||
| 0.0063 mg/l , sample collected Sep 29, 2011, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
| 0.0015 mg/l , sample collected Sep 29, 2011, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
|
||
| 0.0104 mg/l , sample collected Sep 29, 2011, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
| 0.0018 mg/l , sample collected Sep 29, 2011, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
-
- Collected
- Feb 28, 2012 12:15
- Sampling point
- TF102 Treatment Plant T102
- Sample type
- Routine
- Lab sample
- 120229-005
- Laboratory
- Radiation Safety Engineering
-
Gross Alpha, Incl. Radon & U 4002 EPA method 00-02
- Result
- 0.4 pci/l
- Monitoring period
- Not recorded
-
Combined Radium (-226 & -228) 4010
- Result
- Not detected below 0.425 pci/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Radium-226 4020 EPA method 903.1
- Result
- Not detected below 0.425 pci/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2012 – Mar 31, 2012
-
Radium-228 4030 EPA method 904.0
- Result
- Not detected below 0.31 pci/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2012 – Mar 31, 2012
-
- Collected
- Feb 28, 2012 12:22
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- 120229-004
- Laboratory
- Radiation Safety Engineering
-
Gross Alpha, Incl. Radon & U 4002 EPA method 00-02
- Result
- 0.4 pci/l
- Monitoring period
- Not recorded
-
Combined Radium (-226 & -228) 4010
- Result
- Not detected below 0.405 pci/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Radium-226 4020 EPA method 903.1
- Result
- Not detected below 0.405 pci/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2012 – Mar 31, 2012
-
Radium-228 4030 EPA method 904.0
- Result
- Not detected below 0.35 pci/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2012 – Mar 31, 2012
-
- Collected
- Feb 28, 2012 12:16
- Sampling point
- TF102 Treatment Plant T102
- Sample type
- Routine
- Lab sample
- 120229-005RU
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2012 – Mar 31, 2012
-
Combined Uranium 4006 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Feb 28, 2012 12:23
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- 120229-004RU
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2012 – Mar 31, 2012
-
Combined Uranium 4006 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Dec 19, 2011 12:08
- Sampling point
- TF102 Treatment Plant T102
- Sample type
- Routine
- Lab sample
- 111220-003
- Laboratory
- Radiation Safety Engineering
-
Gross Alpha, Incl. Radon & U 4002 EPA method 00-02
- Result
- 0.4 pci/l
- Monitoring period
- Not recorded
-
Combined Radium (-226 & -228) 4010
- Result
- Not detected below 0.425 pci/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Radium-226 4020 EPA method 903.1
- Result
- Not detected below 0.425 pci/l Minimum Reporting Level
- Monitoring period
- Oct 1, 2011 – Dec 31, 2011
-
Radium-228 4030 EPA method 904.0
- Result
- Not detected below 0.31 pci/l Minimum Reporting Level
- Monitoring period
- Oct 1, 2011 – Dec 31, 2011
-
- Collected
- Dec 15, 2011 13:20
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- 111216-050
- Laboratory
- Radiation Safety Engineering
-
Gross Alpha, Incl. Radon & U 4002 EPA method 00-02
- Result
- 0.4 pci/l
- Monitoring period
- Not recorded
-
Combined Radium (-226 & -228) 4010
- Result
- Not detected below 0.405 pci/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Radium-226 4020 EPA method 903.1
- Result
- Not detected below 0.405 pci/l Minimum Reporting Level
- Monitoring period
- Oct 1, 2011 – Dec 31, 2011
-
Radium-228 4030 EPA method 904.0
- Result
- Not detected below 0.35 pci/l Minimum Reporting Level
- Monitoring period
- Oct 1, 2011 – Dec 31, 2011
-
- Collected
- Sep 29, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110930-123PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2009 – Dec 31, 2011
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0061 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Sep 29, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110930-121PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2009 – Dec 31, 2011
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0066 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Sep 29, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110930-119PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2009 – Dec 31, 2011
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0063 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0015 mg/l
-
- Collected
- Sep 29, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110930-118PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2009 – Dec 31, 2011
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0104 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0018 mg/l
Routine (10).