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
MS0260003 , Castalian W/A
10 of the 51 analytes this system has been tested for have been detected at least once, across 113 samples on record.
The other 41 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 113 samples on record, detections range from August 17, 1993 to September 10, 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 | 66 of 84 results | Aug 17, 1993 | Sep 10, 2025 |
| Lead 1030 | Inorganic Chemical | 36 of 84 results | Aug 17, 1993 | Sep 10, 2025 |
| TTHM 2950 | Organic Chemical | 6 of 9 results | Jun 4, 2007 | Oct 17, 2022 |
| Total Haloacetic Acids (Haa5) 2456 | Organic Chemical | 4 of 9 results | Jun 4, 2007 | Oct 17, 2022 |
| Chloroform 2941 | Organic Chemical | 3 of 6 results | Jul 1, 2009 | Aug 17, 2017 |
| Dichloroacetic Acid 2451 | Organic Chemical | 2 of 5 results | Jul 1, 2009 | Jun 28, 2011 |
| Barium 1010 | Inorganic Chemical | 2 of 2 results | Sep 17, 2003 | Feb 9, 2004 |
| Sulfate 1055 | Inorganic Chemical | 2 of 2 results | Sep 17, 2003 | Feb 9, 2004 |
| Monobromoacetic Acid 2453 | Organic Chemical | 1 of 5 results | Jul 1, 2009 | Jul 1, 2009 |
| Fluoride 1025 | Inorganic Chemical | 1 of 2 results | Sep 17, 2003 | Sep 17, 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 101–110 of 113 samples, newest first — collected August 17, 1993 to February 21, 1994. The summary above covers all 113.
20 results from the 10 samples listed here: 11 detected, 9 not detected. Across the whole record it is 123 of 350. 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 |
|---|---|---|
|
||
| 0.064 mg/l , sample collected Feb 21, 1994, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.001 mg/l , sample collected Feb 21, 1994, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.063 mg/l , sample collected Feb 21, 1994, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.001 mg/l , sample collected Feb 21, 1994, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.138 mg/l , sample collected Aug 17, 1993, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.003 mg/l , sample collected Aug 17, 1993, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| Not detected below 0.02 mg/l Method Detection Limit , sample collected Aug 17, 1993, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.001 mg/l , sample collected Aug 17, 1993, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.161 mg/l , sample collected Aug 17, 1993, sampling point DS000 | Copper, Free 1022 | Not recorded |
| Not detected below 0.001 mg/l Method Detection Limit , sample collected Aug 17, 1993, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| Not detected below 0.02 mg/l Method Detection Limit , sample collected Aug 17, 1993, sampling point DS000 | Copper, Free 1022 | Not recorded |
| Not detected below 0.001 mg/l Method Detection Limit , sample collected Aug 17, 1993, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| Not detected below 0.02 mg/l Method Detection Limit , sample collected Aug 17, 1993, sampling point DS000 | Copper, Free 1022 | Not recorded |
| Not detected below 0.001 mg/l Method Detection Limit , sample collected Aug 17, 1993, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.068 mg/l , sample collected Aug 17, 1993, sampling point DS000 | Copper, Free 1022 | Not recorded |
| Not detected below 0.001 mg/l Method Detection Limit , sample collected Aug 17, 1993, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.057 mg/l , sample collected Aug 17, 1993, sampling point DS000 | Copper, Free 1022 | Not recorded |
| Not detected below 0.001 mg/l Method Detection Limit , sample collected Aug 17, 1993, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| Not detected below 0.02 mg/l Method Detection Limit , sample collected Aug 17, 1993, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.002 mg/l , sample collected Aug 17, 1993, sampling point DS000 | Lead 1030 | Not recorded |
-
- Collected
- Feb 21, 1994
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 940222-111L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.064 mg/l
-
Lead 1030
- Result
- 0.001 mg/l
-
- Collected
- Feb 21, 1994
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 940222-110L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.063 mg/l
-
Lead 1030
- Result
- 0.001 mg/l
-
- Collected
- Aug 17, 1993
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 930818-102L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.138 mg/l
-
Lead 1030
- Result
- 0.003 mg/l
-
- Collected
- Aug 17, 1993
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 930818-098L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- Not detected below 0.02 mg/l Method Detection Limit
-
Lead 1030
- Result
- 0.001 mg/l
-
- Collected
- Aug 17, 1993
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 930818-094L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.161 mg/l
-
Lead 1030
- Result
- Not detected below 0.001 mg/l Method Detection Limit
-
- Collected
- Aug 17, 1993
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 930818-093L
- 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
-
- Collected
- Aug 17, 1993
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 930818-092L
- 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
-
- Collected
- Aug 17, 1993
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 930818-090L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.068 mg/l
-
Lead 1030
- Result
- Not detected below 0.001 mg/l Method Detection Limit
-
- Collected
- Aug 17, 1993
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 930818-088L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.057 mg/l
-
Lead 1030
- Result
- Not detected below 0.001 mg/l Method Detection Limit
-
- Collected
- Aug 17, 1993
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 930818-087L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- Not detected below 0.02 mg/l Method Detection Limit
-
Lead 1030
- Result
- 0.002 mg/l
Routine (10).