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
MS0710003 , Dennis Water Association
14 of the 103 analytes this system has been tested for have been detected at least once, across 232 samples on record.
The other 89 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 232 samples on record, detections range from October 29, 2003 to July 29, 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 | 87 of 89 results | Sep 18, 2007 | Sep 23, 2025 |
| Lead 1030 | Inorganic Chemical | 28 of 89 results | Sep 18, 2007 | Sep 23, 2025 |
| Nitrate-Nitrite 1038 | Inorganic Chemical | 21 of 21 results | Jun 14, 2004 | Jul 29, 2026 |
| Nitrate 1040 | Inorganic Chemical | 21 of 21 results | Jun 14, 2004 | Jul 29, 2026 |
| Barium 1010 | Inorganic Chemical | 10 of 10 results | Oct 29, 2003 | Apr 1, 2025 |
| Nickel 1036 | Inorganic Chemical | 6 of 10 results | Oct 29, 2003 | Apr 1, 2025 |
| Total Haloacetic Acids (Haa5) 2456 | Organic Chemical | 5 of 19 results | Sep 10, 2007 | Oct 19, 2022 |
| Gross Alpha Particle Activity 4109 | Radionuclide | 4 of 4 results | Sep 19, 2011 | Apr 2, 2012 |
| Sodium 1052 | Inorganic Chemical | 2 of 3 results | Sep 25, 2019 | Mar 29, 2023 |
| TTHM 2950 | Organic Chemical | 2 of 18 results | Sep 10, 2007 | Jul 12, 2010 |
| Chromium 1020 | Inorganic Chemical | 1 of 10 results | Apr 1, 2025 | Apr 1, 2025 |
| Monobromoacetic Acid 2453 | Organic Chemical | 1 of 13 results | Oct 28, 2020 | Oct 28, 2020 |
| Diquat 2032 | Organic Chemical | 1 of 8 results | Aug 16, 2010 | Aug 16, 2010 |
| Selenium 1045 | Inorganic Chemical | 1 of 10 results | Mar 1, 2010 | Mar 1, 2010 |
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 181–190 of 232 samples, newest first — collected April 12, 2010 to August 10, 2010. The summary above covers all 232.
27 results from the 10 samples listed here: 7 detected, 20 not detected. Across the whole record it is 190 of 920. 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 |
|---|---|---|
|
||
| 0.0037 mg/l , sample collected Aug 10, 2010, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2010 |
| 0.0005 mg/l , sample collected Aug 10, 2010, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2010 |
|
||
| 0.0038 mg/l , sample collected Aug 10, 2010, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 10, 2010, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2010 |
|
||
| 0.0107 mg/l , sample collected Aug 10, 2010, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 10, 2010, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2010 |
|
||
| 0.0175 mg/l , sample collected Aug 10, 2010, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 10, 2010, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2010 |
|
||
| Not detected below 0.025 ug/l Minimum Reporting Level , sample collected Jul 26, 2010, sampling point TF080 | Benzo(a)pyrene 2306 EPA method 550.1 | Not recorded |
|
||
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 12, 2010, sampling point MRT000 | Chloroform 2941 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 12, 2010, sampling point MRT000 | Bromoform 2942 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 12, 2010, sampling point MRT000 | Bromodichloromethane 2943 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 12, 2010, sampling point MRT000 | Dibromochloromethane 2944 EPA method 524.2 | Not recorded |
| 0 This result is recorded as a detection, and the figure the agency wrote — "0.00" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here. The agency recorded a value but no unit of measure for it. The unit is NOT inferable from the analyte: many analytes are reported in more than one unit — TTHM and HAA5 in both MG/L and UG/L — so there is no per-analyte default to fall back on. The number is published as it stands and must not be compared to a limit. 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 Jul 12, 2010, sampling point MRT000 | TTHM 2950 EPA method 524.2 | Jan 1, 2008 – Dec 31, 2010 |
|
||
| Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 12, 2010, sampling point TF080 | Oxamyl 2036 EPA method 531.1 | Not recorded |
| Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 12, 2010, sampling point TF080 | Aldicarb Sulfoxide 2043 EPA method 531.1 | Not recorded |
| Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 12, 2010, sampling point TF080 | Aldicarb Sulfone 2044 EPA method 531.1 | Not recorded |
| Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 12, 2010, sampling point TF080 | Carbofuran 2046 EPA method 531.1 | Not recorded |
| Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 12, 2010, sampling point TF080 | Aldicarb 2047 EPA method 531.1 | Not recorded |
|
||
| Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Jul 12, 2010, sampling point MRT000 | Monochloroacetic Acid 2450 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 12, 2010, sampling point MRT000 | Dichloroacetic Acid 2451 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 12, 2010, sampling point MRT000 | Trichloroacetic Acid 2452 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 12, 2010, sampling point MRT000 | Monobromoacetic Acid 2453 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 12, 2010, sampling point MRT000 | Dibromoacetic Acid 2454 EPA method 552.2 | Not recorded |
| 0 This result is recorded as a detection, and the figure the agency wrote — "0.00" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here. The agency recorded a value but no unit of measure for it. The unit is NOT inferable from the analyte: many analytes are reported in more than one unit — TTHM and HAA5 in both MG/L and UG/L — so there is no per-analyte default to fall back on. The number is published as it stands and must not be compared to a limit. 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 Jul 12, 2010, sampling point MRT000 | Total Haloacetic Acids (Haa5) 2456 | Jan 1, 2008 – Dec 31, 2010 |
|
||
| Not detected below 12.5 ug/l Minimum Reporting Level , sample collected Jul 12, 2010, sampling point TF080 | Glyphosate 2034 EPA method 547 | Not recorded |
|
||
| Not detected below 15 ug/l Minimum Reporting Level , sample collected Apr 12, 2010, sampling point TF080 | Cyanide 1024 EPA method QC10204001X | Jan 1, 2008 – Dec 31, 2010 |
-
- Collected
- Aug 10, 2010
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 100811-149PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2008 – Dec 31, 2010
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0037 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0005 mg/l
-
- Collected
- Aug 10, 2010
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 100811-148PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2008 – Dec 31, 2010
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0038 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Aug 10, 2010
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 100811-147PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2008 – Dec 31, 2010
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0107 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Aug 10, 2010
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 100811-146PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2008 – Dec 31, 2010
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0175 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Jul 26, 2010
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 100727-013SA
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Benzo(a)pyrene 2306 EPA method 550.1
- Result
- Not detected below 0.025 ug/l Minimum Reporting Level
-
- Collected
- Jul 12, 2010
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 100713-012TH
- Laboratory
- MSDH Lab
-
Chloroform 2941 EPA method 524.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- 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
- Not detected below 1 ug/l Minimum Reporting Level
- 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 EPA method 524.2
- Result
- 0 This result is recorded as a detection, and the figure the agency wrote — "0.00" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here. The agency recorded a value but no unit of measure for it. The unit is NOT inferable from the analyte: many analytes are reported in more than one unit — TTHM and HAA5 in both MG/L and UG/L — so there is no per-analyte default to fall back on. The number is published as it stands and must not be compared to a limit. 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
- Jan 1, 2008 – Dec 31, 2010
-
- Collected
- Jul 12, 2010
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 100713-020S7
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Oxamyl 2036 EPA method 531.1
- Result
- Not detected below 0.5 ug/l Minimum Reporting Level
-
Aldicarb Sulfoxide 2043 EPA method 531.1
- Result
- Not detected below 0.5 ug/l Minimum Reporting Level
-
Aldicarb Sulfone 2044 EPA method 531.1
- Result
- Not detected below 0.5 ug/l Minimum Reporting Level
-
Carbofuran 2046 EPA method 531.1
- Result
- Not detected below 0.5 ug/l Minimum Reporting Level
-
Aldicarb 2047 EPA method 531.1
- Result
- Not detected below 0.5 ug/l Minimum Reporting Level
-
- Collected
- Jul 12, 2010
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 100713-012HA
- Laboratory
- MSDH Lab
-
Monochloroacetic Acid 2450 EPA method 552.2
- Result
- Not detected below 0.002 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dichloroacetic Acid 2451 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Trichloroacetic Acid 2452 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Monobromoacetic Acid 2453 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dibromoacetic Acid 2454 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Total Haloacetic Acids (Haa5) 2456
- Result
- 0 This result is recorded as a detection, and the figure the agency wrote — "0.00" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here. The agency recorded a value but no unit of measure for it. The unit is NOT inferable from the analyte: many analytes are reported in more than one unit — TTHM and HAA5 in both MG/L and UG/L — so there is no per-analyte default to fall back on. The number is published as it stands and must not be compared to a limit. 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
- Jan 1, 2008 – Dec 31, 2010
-
- Collected
- Jul 12, 2010
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 100713-008SC
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Glyphosate 2034 EPA method 547
- Result
- Not detected below 12.5 ug/l Minimum Reporting Level
-
- Collected
- Apr 12, 2010
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 100413-045CN
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2008 – Dec 31, 2010
-
Cyanide 1024 EPA method QC10204001X
- Result
- Not detected below 15 ug/l Minimum Reporting Level
Routine (10).