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
MS0240027 , Knollwood
23 of the 59 analytes this system has been tested for have been detected at least once, across 149 samples on record.
The other 36 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 149 samples on record, detections range from August 17, 1993 to February 11, 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.
| Analyte | Kind | Detected in | First detected | Last detected |
|---|---|---|---|---|
| Copper, Free 1022 | Inorganic Chemical | 53 of 70 results | Aug 17, 1993 | Jun 30, 2023 |
| Lead 1030 | Inorganic Chemical | 43 of 70 results | Aug 17, 1993 | Jun 29, 2023 |
| Barium 1010 | Inorganic Chemical | 10 of 10 results | Sep 15, 2003 | Feb 11, 2025 |
| Fluoride 1025 | Inorganic Chemical | 10 of 10 results | Sep 15, 2003 | Feb 11, 2025 |
| Total Haloacetic Acids (Haa5) 2456 | Organic Chemical | 10 of 10 results | May 24, 2004 | Feb 11, 2025 |
| TTHM 2950 | Organic Chemical | 10 of 10 results | May 24, 2004 | Feb 11, 2025 |
| Chromium 1020 | Inorganic Chemical | 6 of 10 results | Sep 15, 2003 | Apr 26, 2022 |
| Chloroform 2941 | Organic Chemical | 6 of 6 results | Sep 19, 2006 | Jul 30, 2018 |
| Bromodichloromethane 2943 | Organic Chemical | 6 of 6 results | Sep 19, 2006 | Jul 30, 2018 |
| Dibromochloromethane 2944 | Organic Chemical | 6 of 6 results | Sep 19, 2006 | Jul 30, 2018 |
| Dichloroacetic Acid 2451 | Organic Chemical | 4 of 4 results | Sep 18, 2008 | Jul 30, 2018 |
| Trichloroacetic Acid 2452 | Organic Chemical | 4 of 4 results | Sep 18, 2008 | Jul 30, 2018 |
| Sodium 1052 | Inorganic Chemical | 3 of 3 results | Sep 16, 2019 | Feb 13, 2024 |
| Monobromoacetic Acid 2453 | Organic Chemical | 2 of 4 results | Jul 19, 2012 | Jul 30, 2018 |
| Dibromoacetic Acid 2454 | Organic Chemical | 2 of 4 results | Jul 19, 2012 | Jul 30, 2018 |
| Gross Alpha Particle Activity 4109 | Radionuclide | 2 of 4 results | Jun 28, 2012 | Sep 18, 2012 |
| Gross Alpha, Excl. Radon & U 4000 | Radionuclide | 2 of 2 results | Sep 26, 2011 | Nov 30, 2011 |
| Combined Uranium 4006 | Radionuclide | 2 of 3 results | Sep 26, 2011 | Nov 30, 2011 |
| Nickel 1036 | Inorganic Chemical | 2 of 10 results | Feb 6, 2006 | Apr 7, 2008 |
| Sulfate 1055 | Inorganic Chemical | 2 of 2 results | Sep 15, 2003 | Feb 2, 2004 |
| Monochloroacetic Acid 2450 | Organic Chemical | 1 of 4 results | Jul 19, 2012 | Jul 19, 2012 |
| Arsenic 1005 | Inorganic Chemical | 1 of 10 results | Apr 7, 2008 | Apr 7, 2008 |
| Selenium 1045 | Inorganic Chemical | 1 of 10 results | Feb 6, 2006 | Feb 6, 2006 |
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 149 samples, newest first — collected February 7, 2011 to November 30, 2011. The summary above covers all 149.
37 results from the 10 samples listed here: 11 detected, 26 not detected. Across the whole record it is 188 of 580. 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 |
|---|---|---|
|
||
| 0.05 pci/l The agency recorded which kind of limit this result was below, but stored nothing as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected Nov 30, 2011 13:17, sampling point TF101 | Gross Alpha, Excl. Radon & U 4000 | Not recorded |
| 0.074 ug/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected Nov 30, 2011 13:17, sampling point TF101 | Combined Uranium 4006 EPA method 200.8 | Oct 1, 2011 – Dec 31, 2011 |
| Not detected below 0.755 pci/l Minimum Reporting Level , sample collected Nov 30, 2011 13:17, sampling point TF101 | Combined Radium (-226 & -228) 4010 | Not recorded |
| Not detected below 0.755 pci/l Minimum Reporting Level , sample collected Nov 30, 2011 13:17, sampling point TF101 | Radium-226 4020 EPA method 903.1 | Oct 1, 2011 – Dec 31, 2011 |
| Not detected below 0.568 pci/l Minimum Reporting Level , sample collected Nov 30, 2011 13:17, sampling point TF101 | Radium-228 4030 EPA method 904.0 | Oct 1, 2011 – Dec 31, 2011 |
| Not detected below 1.89 pci/l Minimum Reporting Level , sample collected Nov 30, 2011 13:17, sampling point TF101 | Gross Alpha Particle Activity 4109 EPA method 900.0 | Oct 1, 2011 – Dec 31, 2011 |
|
||
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Nov 30, 2011 01:11, sampling point TF101 | Arsenic 1005 EPA method 200.8 | Jan 1, 2011 – Dec 31, 2013 |
| 0.0164 mg/l , sample collected Nov 30, 2011 01:11, sampling point TF101 | Barium 1010 EPA method 200.8 | Jan 1, 2011 – Dec 31, 2013 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Nov 30, 2011 01:11, sampling point TF101 | Cadmium 1015 EPA method 200.8 | Jan 1, 2011 – Dec 31, 2013 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Nov 30, 2011 01:11, sampling point TF101 | Chromium 1020 EPA method 200.8 | Jan 1, 2011 – Dec 31, 2013 |
| 0.365 mg/l , sample collected Nov 30, 2011 01:11, sampling point TF101 | Fluoride 1025 EPA method 380-75WE | Jan 1, 2011 – Dec 31, 2013 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Nov 30, 2011 01:11, sampling point TF101 | Mercury 1035 EPA method 200.8 | Jan 1, 2011 – Dec 31, 2013 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Nov 30, 2011 01:11, sampling point TF101 | Nickel 1036 EPA method 200.8 | Not recorded |
| Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Nov 30, 2011 01:11, sampling point TF101 | Selenium 1045 EPA method 200.8 | Jan 1, 2011 – Dec 31, 2013 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Nov 30, 2011 01:11, sampling point TF101 | Antimony, Total 1074 EPA method 200.8 | Jan 1, 2011 – Dec 31, 2013 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Nov 30, 2011 01:11, sampling point TF101 | Beryllium, Total 1075 EPA method 200.8 | Jan 1, 2011 – Dec 31, 2013 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Nov 30, 2011 01:11, sampling point TF101 | Thallium, Total 1085 EPA method 200.8 | Jan 1, 2011 – Dec 31, 2013 |
|
||
| 0.08 pci/l The agency recorded which kind of limit this result was below, but stored nothing as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected Sep 26, 2011 14:05, sampling point TF101 | Gross Alpha, Excl. Radon & U 4000 | Jul 1, 2011 – Sep 30, 2011 |
| 0.12 ug/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected Sep 26, 2011 14:05, sampling point TF101 | Combined Uranium 4006 EPA method 200.8 | Jul 1, 2011 – Sep 30, 2011 |
| Not detected below 0.732 pci/l Minimum Reporting Level , sample collected Sep 26, 2011 14:05, sampling point TF101 | Combined Radium (-226 & -228) 4010 | Not recorded |
| Not detected below 0.732 pci/l Minimum Reporting Level , sample collected Sep 26, 2011 14:05, sampling point TF101 | Radium-226 4020 EPA method 903.1 | Jul 1, 2011 – Sep 30, 2011 |
| Not detected below 0.568 pci/l Minimum Reporting Level , sample collected Sep 26, 2011 14:05, sampling point TF101 | Radium-228 4030 EPA method 904.0 | Jul 1, 2011 – Sep 30, 2011 |
| Not detected below 2.88 pci/l Minimum Reporting Level , sample collected Sep 26, 2011 14:05, sampling point TF101 | Gross Alpha Particle Activity 4109 EPA method 900.0 | Jul 1, 2011 – Sep 30, 2011 |
|
||
| Not detected below 15 ug/l Minimum Reporting Level , sample collected Sep 26, 2011 02:01, sampling point TF101 | Cyanide 1024 EPA method QC10204001X | Jan 1, 2011 – Dec 31, 2013 |
|
||
| 0.0105 mg/l , sample collected Jul 13, 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 Jul 13, 2011, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
|
||
| 0.0865 mg/l , sample collected Jul 12, 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 Jul 12, 2011, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
|
||
| 0.1577 mg/l , sample collected Jul 12, 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 Jul 12, 2011, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
|
||
| 0.0447 mg/l , sample collected Jul 12, 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 Jul 12, 2011, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
|
||
| 0.0094 mg/l , sample collected Jul 12, 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 Jul 12, 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 Feb 7, 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 Feb 7, 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 Feb 7, 2011, sampling point TF101 | Nitrite 1041 EPA method 353.2 | Jan 1, 2011 – Dec 31, 2011 |
-
- Collected
- Nov 30, 2011 13:17
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- 291301005
- Laboratory
- Gel Laboratories
-
Gross Alpha, Excl. Radon & U 4000
- Result
- 0.05 pci/l The agency recorded which kind of limit this result was below, but stored nothing as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType.
- Monitoring period
- Not recorded
-
Combined Uranium 4006 EPA method 200.8
- Result
- 0.074 ug/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType.
- Monitoring period
- Oct 1, 2011 – Dec 31, 2011
-
Combined Radium (-226 & -228) 4010
- Result
- Not detected below 0.755 pci/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Radium-226 4020 EPA method 903.1
- Result
- Not detected below 0.755 pci/l Minimum Reporting Level
- Monitoring period
- Oct 1, 2011 – Dec 31, 2011
-
Radium-228 4030 EPA method 904.0
- Result
- Not detected below 0.568 pci/l Minimum Reporting Level
- Monitoring period
- Oct 1, 2011 – Dec 31, 2011
-
Gross Alpha Particle Activity 4109 EPA method 900.0
- Result
- Not detected below 1.89 pci/l Minimum Reporting Level
- Monitoring period
- Oct 1, 2011 – Dec 31, 2011
-
- Collected
- Nov 30, 2011 01:11
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- 111201-036IN
- Laboratory
- MSDH Lab
-
Arsenic 1005 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Barium 1010 EPA method 200.8
- Result
- 0.0164 mg/l
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Cadmium 1015 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Chromium 1020 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Fluoride 1025 EPA method 380-75WE
- Result
- 0.365 mg/l
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Mercury 1035 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
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, 2011 – Dec 31, 2013
-
Antimony, Total 1074 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Beryllium, Total 1075 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Thallium, Total 1085 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
- Collected
- Sep 26, 2011 14:05
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- 286740011
- Laboratory
- Gel Laboratories
-
Gross Alpha, Excl. Radon & U 4000
- Result
- 0.08 pci/l The agency recorded which kind of limit this result was below, but stored nothing as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType.
- Monitoring period
- Jul 1, 2011 – Sep 30, 2011
-
Combined Uranium 4006 EPA method 200.8
- Result
- 0.12 ug/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType.
- Monitoring period
- Jul 1, 2011 – Sep 30, 2011
-
Combined Radium (-226 & -228) 4010
- Result
- Not detected below 0.732 pci/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Radium-226 4020 EPA method 903.1
- Result
- Not detected below 0.732 pci/l Minimum Reporting Level
- Monitoring period
- Jul 1, 2011 – Sep 30, 2011
-
Radium-228 4030 EPA method 904.0
- Result
- Not detected below 0.568 pci/l Minimum Reporting Level
- Monitoring period
- Jul 1, 2011 – Sep 30, 2011
-
Gross Alpha Particle Activity 4109 EPA method 900.0
- Result
- Not detected below 2.88 pci/l Minimum Reporting Level
- Monitoring period
- Jul 1, 2011 – Sep 30, 2011
-
- Collected
- Sep 26, 2011 02:01
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- 110927-001CN
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Cyanide 1024 EPA method QC10204001X
- Result
- Not detected below 15 ug/l Minimum Reporting Level
-
- Collected
- Jul 13, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110714-025PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2009 – Dec 31, 2011
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0105 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Jul 12, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110714-024PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2009 – Dec 31, 2011
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0865 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Jul 12, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110714-023PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2009 – Dec 31, 2011
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.1577 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Jul 12, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110714-022PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2009 – Dec 31, 2011
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0447 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Jul 12, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110714-021PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2009 – Dec 31, 2011
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0094 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Feb 7, 2011
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- 110208-004NI
- 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
Routine (10).