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 111–120 of 149 samples, newest first — collected June 19, 1996 to February 2, 2004. The summary above covers all 149.
47 results from the 10 samples listed here: 12 detected, 35 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 |
|---|---|---|
|
||
| Not detected below 0.01 mg/l Minimum Reporting Level , sample collected Feb 2, 2004, sampling point TF101 | Cyanide 1024 EPA method QC10204001X | Jan 1, 2002 – Dec 31, 2004 |
|
||
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 27, 2004, sampling point TF101 | 1,2,4-Trichlorobenzene 2378 | Jan 1, 2004 – Mar 31, 2004 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 27, 2004, sampling point TF101 | Cis-1,2-Dichloroethylene 2380 | Jan 1, 2004 – Mar 31, 2004 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 27, 2004, sampling point TF101 | Xylenes, Total 2955 | Jan 1, 2004 – Mar 31, 2004 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 27, 2004, sampling point TF101 | Dichloromethane 2964 | Jan 1, 2004 – Mar 31, 2004 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 27, 2004, sampling point TF101 | O-Dichlorobenzene 2968 | Jan 1, 2004 – Mar 31, 2004 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 27, 2004, sampling point TF101 | P-Dichlorobenzene 2969 | Jan 1, 2004 – Mar 31, 2004 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 27, 2004, sampling point TF101 | Vinyl Chloride 2976 | Jan 1, 2004 – Mar 31, 2004 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 27, 2004, sampling point TF101 | 1,1-Dichloroethylene 2977 | Jan 1, 2004 – Mar 31, 2004 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 27, 2004, sampling point TF101 | Trans-1,2-Dichloroethylene 2979 | Jan 1, 2004 – Mar 31, 2004 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 27, 2004, sampling point TF101 | 1,2-Dichloroethane 2980 | Jan 1, 2004 – Mar 31, 2004 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 27, 2004, sampling point TF101 | 1,1,1-Trichloroethane 2981 | Jan 1, 2004 – Mar 31, 2004 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 27, 2004, sampling point TF101 | Carbon Tetrachloride 2982 | Jan 1, 2004 – Mar 31, 2004 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 27, 2004, sampling point TF101 | 1,2-Dichloropropane 2983 | Jan 1, 2004 – Mar 31, 2004 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 27, 2004, sampling point TF101 | Trichloroethylene 2984 | Jan 1, 2004 – Mar 31, 2004 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 27, 2004, sampling point TF101 | 1,1,2-Trichloroethane 2985 | Jan 1, 2004 – Mar 31, 2004 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 27, 2004, sampling point TF101 | Tetrachloroethylene 2987 | Jan 1, 2004 – Mar 31, 2004 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 27, 2004, sampling point TF101 | Chlorobenzene 2989 | Jan 1, 2004 – Mar 31, 2004 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 27, 2004, sampling point TF101 | Benzene 2990 | Jan 1, 2004 – Mar 31, 2004 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 27, 2004, sampling point TF101 | Toluene 2991 | Jan 1, 2004 – Mar 31, 2004 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 27, 2004, sampling point TF101 | Ethylbenzene 2992 | Jan 1, 2004 – Mar 31, 2004 |
| Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 27, 2004, sampling point TF101 | Styrene 2996 | Jan 1, 2004 – Mar 31, 2004 |
|
||
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 15, 2003, sampling point TF101 | Arsenic 1005 EPA method 200.8 | Jan 1, 2002 – Dec 31, 2004 |
| 0.014 mg/l , sample collected Sep 15, 2003, sampling point TF101 | Barium 1010 EPA method 200.8 | Jan 1, 2002 – Dec 31, 2004 |
| Not detected below 0.0001 mg/l Minimum Reporting Level , sample collected Sep 15, 2003, sampling point TF101 | Cadmium 1015 EPA method 200.8 | Jan 1, 2002 – Dec 31, 2004 |
| 0.001 mg/l , sample collected Sep 15, 2003, sampling point TF101 | Chromium 1020 EPA method 200.8 | Jan 1, 2002 – Dec 31, 2004 |
| 0.377 mg/l , sample collected Sep 15, 2003, sampling point TF101 | Fluoride 1025 EPA method 300.0 | Jan 1, 2002 – Dec 31, 2004 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 15, 2003, sampling point TF101 | Mercury 1035 EPA method 200.8 | Jan 1, 2002 – Dec 31, 2004 |
| Not detected below 0.005 mg/l Minimum Reporting Level , sample collected Sep 15, 2003, sampling point TF101 | Nickel 1036 EPA method 200.8 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 15, 2003, sampling point TF101 | Selenium 1045 EPA method 200.8 | Jan 1, 2002 – Dec 31, 2004 |
| 5.22 mg/l , sample collected Sep 15, 2003, sampling point TF101 | Sulfate 1055 EPA method 300.0 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 15, 2003, sampling point TF101 | Antimony, Total 1074 EPA method 200.8 | Jan 1, 2002 – Dec 31, 2004 |
| Not detected below 0.0003 mg/l Minimum Reporting Level , sample collected Sep 15, 2003, sampling point TF101 | Beryllium, Total 1075 EPA method 200.8 | Jan 1, 2002 – Dec 31, 2004 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 15, 2003, sampling point TF101 | Thallium, Total 1085 EPA method 200.8 | Jan 1, 2002 – Dec 31, 2004 |
|
||
| Not detected below 0.01 mg/l Minimum Reporting Level , sample collected Sep 15, 2003, sampling point TF101 | Cyanide 1024 EPA method QC10204001X | Jan 1, 2002 – Dec 31, 2004 |
|
||
| 0.015 mg/l , sample collected Aug 22, 2000, sampling point DS000 | Copper, Free 1022 | Not recorded |
| Not detected below 0.001 mg/l Method Detection Limit , sample collected Aug 22, 2000, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.066 mg/l , sample collected Aug 22, 2000, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.001 mg/l , sample collected Aug 22, 2000, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.018 mg/l , sample collected Aug 22, 2000, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.001 mg/l , sample collected Aug 22, 2000, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.017 mg/l , sample collected Aug 22, 2000, sampling point DS000 | Copper, Free 1022 | Not recorded |
| Not detected below 0.001 mg/l Method Detection Limit , sample collected Aug 22, 2000, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.025 mg/l , sample collected Aug 22, 2000, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.004 mg/l , sample collected Aug 22, 2000, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| Not detected below 0.02 mg/l Method Detection Limit , sample collected Jun 19, 1996, sampling point DS000 | Copper, Free 1022 | Not recorded |
| Not detected below 0.001 mg/l Method Detection Limit , sample collected Jun 19, 1996, sampling point DS000 | Lead 1030 | Not recorded |
-
- Collected
- Feb 2, 2004
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- 040203-015CN
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2002 – Dec 31, 2004
-
Cyanide 1024 EPA method QC10204001X
- Result
- Not detected below 0.01 mg/l Minimum Reporting Level
-
- Collected
- Jan 27, 2004
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- 040128-036VO
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2004 – Mar 31, 2004
-
1,2,4-Trichlorobenzene 2378
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
Cis-1,2-Dichloroethylene 2380
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
Xylenes, Total 2955
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
Dichloromethane 2964
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
O-Dichlorobenzene 2968
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
P-Dichlorobenzene 2969
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
Vinyl Chloride 2976
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
1,1-Dichloroethylene 2977
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
Trans-1,2-Dichloroethylene 2979
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
1,2-Dichloroethane 2980
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
1,1,1-Trichloroethane 2981
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
Carbon Tetrachloride 2982
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
1,2-Dichloropropane 2983
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
Trichloroethylene 2984
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
1,1,2-Trichloroethane 2985
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
Tetrachloroethylene 2987
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
Chlorobenzene 2989
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
Benzene 2990
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
Toluene 2991
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
Ethylbenzene 2992
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
Styrene 2996
- Result
- Not detected below 0.0005 mg/l Method Detection Limit
-
- Collected
- Sep 15, 2003
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- 030916-060IN
- Laboratory
- MSDH Lab
-
Arsenic 1005 EPA method 200.8
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2002 – Dec 31, 2004
-
Barium 1010 EPA method 200.8
- Result
- 0.014 mg/l
- Monitoring period
- Jan 1, 2002 – Dec 31, 2004
-
Cadmium 1015 EPA method 200.8
- Result
- Not detected below 0.0001 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2002 – Dec 31, 2004
-
Chromium 1020 EPA method 200.8
- Result
- 0.001 mg/l
- Monitoring period
- Jan 1, 2002 – Dec 31, 2004
-
Fluoride 1025 EPA method 300.0
- Result
- 0.377 mg/l
- Monitoring period
- Jan 1, 2002 – Dec 31, 2004
-
Mercury 1035 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2002 – Dec 31, 2004
-
Nickel 1036 EPA method 200.8
- Result
- Not detected below 0.005 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Selenium 1045 EPA method 200.8
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2002 – Dec 31, 2004
-
Sulfate 1055 EPA method 300.0
- Result
- 5.22 mg/l
- Monitoring period
- Not recorded
-
Antimony, Total 1074 EPA method 200.8
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2002 – Dec 31, 2004
-
Beryllium, Total 1075 EPA method 200.8
- Result
- Not detected below 0.0003 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2002 – Dec 31, 2004
-
Thallium, Total 1085 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2002 – Dec 31, 2004
-
- Collected
- Sep 15, 2003
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- 030916-048CN
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2002 – Dec 31, 2004
-
Cyanide 1024 EPA method QC10204001X
- Result
- Not detected below 0.01 mg/l Minimum Reporting Level
-
- Collected
- Aug 22, 2000
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 000824-108L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.015 mg/l
-
Lead 1030
- Result
- Not detected below 0.001 mg/l Method Detection Limit
-
- Collected
- Aug 22, 2000
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 000824-107L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.066 mg/l
-
Lead 1030
- Result
- 0.001 mg/l
-
- Collected
- Aug 22, 2000
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 000824-106L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.018 mg/l
-
Lead 1030
- Result
- 0.001 mg/l
-
- Collected
- Aug 22, 2000
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 000824-105L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.017 mg/l
-
Lead 1030
- Result
- Not detected below 0.001 mg/l Method Detection Limit
-
- Collected
- Aug 22, 2000
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 000824-101L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.025 mg/l
-
Lead 1030
- Result
- 0.004 mg/l
-
- Collected
- Jun 19, 1996
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 960620-204L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- Not detected below 0.02 mg/l Method Detection Limit
-
Lead 1030
- Result
- Not detected below 0.001 mg/l Method Detection Limit
Routine (10).