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 61–70 of 201 samples, newest first — collected May 8, 2019 to August 13, 2020. The summary above covers all 201.
45 results from the 10 samples listed here: 20 detected, 25 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 |
|---|---|---|
|
||
| 0.0489 mg/l , sample collected Aug 13, 2020 07:40, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2018 – Dec 31, 2020 |
| 0.0008 mg/l , sample collected Aug 13, 2020 07:40, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2018 – Dec 31, 2020 |
|
||
| 0.095 mg/l , sample collected Aug 13, 2020 22:00, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2018 – Dec 31, 2020 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 13, 2020 22:00, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2018 – Dec 31, 2020 |
|
||
| 4.39 ug/l , sample collected Jun 25, 2020, sampling point DS000 | Chloroform 2941 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 25, 2020, sampling point DS000 | Bromoform 2942 EPA method 524.2 | Not recorded |
| 1.13 ug/l , sample collected Jun 25, 2020, sampling point DS000 | Bromodichloromethane 2943 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 25, 2020, sampling point DS000 | Dibromochloromethane 2944 EPA method 524.2 | Not recorded |
| 5.52 ug/l , sample collected Jun 25, 2020, sampling point DS000 | TTHM 2950 | Jan 1, 2020 – Dec 31, 2020 |
|
||
| Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Jun 25, 2020 15:40, sampling point DS000 | Monochloroacetic Acid 2450 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jun 25, 2020 15:40, sampling point DS000 | Dichloroacetic Acid 2451 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jun 25, 2020 15:40, sampling point DS000 | Trichloroacetic Acid 2452 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jun 25, 2020 15:40, sampling point DS000 | Monobromoacetic Acid 2453 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jun 25, 2020 15:40, sampling point DS000 | Dibromoacetic Acid 2454 EPA method 552.2 | Not recorded |
| Not detected below 0.006 mg/l Minimum Reporting Level , sample collected Jun 25, 2020 15:40, sampling point DS000 | Total Haloacetic Acids (Haa5) 2456 | Not recorded |
|
||
| 0.0013 mg/l , sample collected Oct 23, 2019 14:50, sampling point TF102 | Arsenic 1005 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| 0.0114 mg/l , sample collected Oct 23, 2019 14:50, sampling point TF102 | Barium 1010 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 23, 2019 14:50, sampling point TF102 | Cadmium 1015 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 23, 2019 14:50, sampling point TF102 | Chromium 1020 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| 4.3 mg/l , sample collected Oct 23, 2019 14:50, sampling point TF102 | Fluoride 1025 EPA method QC 10-109-12-2-A | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 23, 2019 14:50, sampling point TF102 | Mercury 1035 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| 0.0005 mg/l , sample collected Oct 23, 2019 14:50, sampling point TF102 | Nickel 1036 EPA method 200.8 | Not recorded |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 23, 2019 14:50, sampling point TF102 | Selenium 1045 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 23, 2019 14:50, sampling point TF102 | Antimony, Total 1074 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 23, 2019 14:50, sampling point TF102 | Beryllium, Total 1075 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 23, 2019 14:50, sampling point TF102 | Thallium, Total 1085 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
|
||
| 0.0006 mg/l , sample collected Oct 23, 2019 14:40, sampling point TF101 | Arsenic 1005 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| 0.0096 mg/l , sample collected Oct 23, 2019 14:40, sampling point TF101 | Barium 1010 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 23, 2019 14:40, sampling point TF101 | Cadmium 1015 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 23, 2019 14:40, sampling point TF101 | Chromium 1020 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| 1.45 mg/l , sample collected Oct 23, 2019 14:40, sampling point TF101 | Fluoride 1025 EPA method QC 10-109-12-2-A | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 23, 2019 14:40, sampling point TF101 | Mercury 1035 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 23, 2019 14:40, sampling point TF101 | Nickel 1036 EPA method 200.8 | Not recorded |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 23, 2019 14:40, sampling point TF101 | Selenium 1045 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 23, 2019 14:40, sampling point TF101 | Antimony, Total 1074 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 23, 2019 14:40, sampling point TF101 | Beryllium, Total 1075 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 23, 2019 14:40, sampling point TF101 | Thallium, Total 1085 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
|
||
| 110000 ug/l , sample collected Sep 30, 2019 09:30, sampling point TF102 | Sodium 1052 EPA method 200.7 | Not recorded |
|
||
| 120000 ug/l , sample collected Sep 30, 2019 09:10, sampling point TF101 | Sodium 1052 EPA method 200.7 | Not recorded |
|
||
| 29.9 ug/l , sample collected May 29, 2019 02:00, sampling point MRT000 | Chloroform 2941 EPA method 524.2 | Not recorded |
| 2.89 ug/l , sample collected May 29, 2019 02:00, sampling point MRT000 | Bromoform 2942 EPA method 524.2 | Not recorded |
| 28.6 ug/l , sample collected May 29, 2019 02:00, sampling point MRT000 | Bromodichloromethane 2943 EPA method 524.2 | Not recorded |
| 20.7 ug/l , sample collected May 29, 2019 02:00, sampling point MRT000 | Dibromochloromethane 2944 EPA method 524.2 | Not recorded |
| 82.1 ug/l , sample collected May 29, 2019 02:00, sampling point MRT000 | TTHM 2950 | Jan 1, 2019 – Dec 31, 2019 |
|
||
| Not detected below 0.015 mg/l Minimum Reporting Level , sample collected May 8, 2019 16:25, sampling point TF102 | Cyanide 1024 EPA method QC10204001X | Jan 1, 2017 – Dec 31, 2019 |
-
- Collected
- Aug 13, 2020 07:40
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 200818-002PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2018 – Dec 31, 2020
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0489 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0008 mg/l
-
- Collected
- Aug 13, 2020 22:00
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 200818-001PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2018 – Dec 31, 2020
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.095 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Jun 25, 2020
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 200626-003TH
- Laboratory
- MSDH Lab
-
Chloroform 2941 EPA method 524.2
- Result
- 4.39 ug/l
- Monitoring period
- Not recorded
-
Bromoform 2942 EPA method 524.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Bromodichloromethane 2943 EPA method 524.2
- Result
- 1.13 ug/l
- Monitoring period
- Not recorded
-
Dibromochloromethane 2944 EPA method 524.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
TTHM 2950
- Result
- 5.52 ug/l
- Monitoring period
- Jan 1, 2020 – Dec 31, 2020
-
- Collected
- Jun 25, 2020 15:40
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 200626-003HA
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Monochloroacetic Acid 2450 EPA method 552.2
- Result
- Not detected below 0.002 mg/l Minimum Reporting Level
-
Dichloroacetic Acid 2451 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
-
Trichloroacetic Acid 2452 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
-
Monobromoacetic Acid 2453 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
-
Dibromoacetic Acid 2454 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
-
Total Haloacetic Acids (Haa5) 2456
- Result
- Not detected below 0.006 mg/l Minimum Reporting Level
-
- Collected
- Oct 23, 2019 14:50
- Sampling point
- TF102 Treatment Plant T102
- Sample type
- Routine
- Lab sample
- 191025-004IN
- Laboratory
- MSDH Lab
-
Arsenic 1005 EPA method 200.8
- Result
- 0.0013 mg/l
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Barium 1010 EPA method 200.8
- Result
- 0.0114 mg/l
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Cadmium 1015 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Chromium 1020 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Fluoride 1025 EPA method QC 10-109-12-2-A
- Result
- 4.3 mg/l
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Mercury 1035 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Nickel 1036 EPA method 200.8
- Result
- 0.0005 mg/l
- Monitoring period
- Not recorded
-
Selenium 1045 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Antimony, Total 1074 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Beryllium, Total 1075 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Thallium, Total 1085 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
- Collected
- Oct 23, 2019 14:40
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- 191025-003IN
- Laboratory
- MSDH Lab
-
Arsenic 1005 EPA method 200.8
- Result
- 0.0006 mg/l
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Barium 1010 EPA method 200.8
- Result
- 0.0096 mg/l
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Cadmium 1015 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Chromium 1020 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Fluoride 1025 EPA method QC 10-109-12-2-A
- Result
- 1.45 mg/l
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Mercury 1035 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
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 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Antimony, Total 1074 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Beryllium, Total 1075 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Thallium, Total 1085 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
- Collected
- Sep 30, 2019 09:30
- Sampling point
- TF102 Treatment Plant T102
- Sample type
- Routine
- Lab sample
- 680-175068-45
- Laboratory
- Test America-Savannah
- Monitoring period
- Not recorded
-
Sodium 1052 EPA method 200.7
- Result
- 110000 ug/l
-
- Collected
- Sep 30, 2019 09:10
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- 680-175068-44
- Laboratory
- Test America-Savannah
- Monitoring period
- Not recorded
-
Sodium 1052 EPA method 200.7
- Result
- 120000 ug/l
-
- Collected
- May 29, 2019 02:00
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 190530-017TH
- Laboratory
- MSDH Lab
-
Chloroform 2941 EPA method 524.2
- Result
- 29.9 ug/l
- Monitoring period
- Not recorded
-
Bromoform 2942 EPA method 524.2
- Result
- 2.89 ug/l
- Monitoring period
- Not recorded
-
Bromodichloromethane 2943 EPA method 524.2
- Result
- 28.6 ug/l
- Monitoring period
- Not recorded
-
Dibromochloromethane 2944 EPA method 524.2
- Result
- 20.7 ug/l
- Monitoring period
- Not recorded
-
TTHM 2950
- Result
- 82.1 ug/l
- Monitoring period
- Jan 1, 2019 – Dec 31, 2019
-
- Collected
- May 8, 2019 16:25
- Sampling point
- TF102 Treatment Plant T102
- Sample type
- Routine
- Lab sample
- 190510-002CN
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Cyanide 1024 EPA method QC10204001X
- Result
- Not detected below 0.015 mg/l Minimum Reporting Level
Routine (10).