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
MS0610016 , Monterey Water Assn-West
39 of the 73 analytes this system has been tested for have been detected at least once, across 419 samples on record.
The other 34 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 419 samples on record, detections range from October 22, 2003 to June 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 | 61 of 61 results | Aug 14, 2007 | Jul 20, 2023 |
| Lead 1030 | Inorganic Chemical | 46 of 61 results | Aug 14, 2007 | Jul 20, 2023 |
| Fluoride 1025 | Inorganic Chemical | 39 of 39 results | Oct 22, 2003 | Mar 24, 2025 |
| TTHM 2950 | Organic Chemical | 36 of 36 results | Sep 13, 2004 | Jun 29, 2026 |
| Barium 1010 | Inorganic Chemical | 36 of 36 results | Oct 22, 2003 | Mar 24, 2025 |
| Total Haloacetic Acids (Haa5) 2456 | Organic Chemical | 35 of 35 results | Sep 13, 2004 | Nov 24, 2025 |
| Chloroform 2941 | Organic Chemical | 31 of 31 results | Oct 11, 2006 | Jun 29, 2026 |
| Bromodichloromethane 2943 | Organic Chemical | 31 of 31 results | Oct 11, 2006 | Jun 29, 2026 |
| Dichloroacetic Acid 2451 | Organic Chemical | 28 of 28 results | Jul 2, 2008 | Nov 24, 2025 |
| Trichloroacetic Acid 2452 | Organic Chemical | 28 of 28 results | Jul 2, 2008 | Nov 24, 2025 |
| Xylenes, Total 2955 | Organic Chemical | 25 of 89 results | Jun 4, 2009 | Sep 21, 2022 |
| Gross Alpha, Incl. Radon & U 4002 | Radionuclide | 20 of 20 results | Mar 15, 2012 | Oct 16, 2012 |
| Dibromochloromethane 2944 | Organic Chemical | 18 of 31 results | Oct 11, 2006 | Jun 29, 2026 |
| Chromium 1020 | Inorganic Chemical | 14 of 36 results | Mar 24, 2004 | Mar 31, 2014 |
| Sodium 1052 | Inorganic Chemical | 11 of 11 results | Feb 19, 2009 | Dec 14, 2023 |
| Ethylbenzene 2992 | Organic Chemical | 10 of 89 results | Sep 2, 2010 | Sep 21, 2022 |
| Sulfate 1055 | Inorganic Chemical | 6 of 6 results | Oct 22, 2003 | Feb 19, 2009 |
| Nickel 1036 | Inorganic Chemical | 5 of 36 results | Mar 27, 2006 | Mar 31, 2014 |
| Selenium 1045 | Inorganic Chemical | 5 of 36 results | Mar 24, 2004 | May 15, 2013 |
| Dibromoacetic Acid 2454 | Organic Chemical | 3 of 28 results | Jun 9, 2009 | Nov 24, 2025 |
| Monochloroacetic Acid 2450 | Organic Chemical | 3 of 28 results | Dec 7, 2009 | Aug 26, 2024 |
| Arsenic 1005 | Inorganic Chemical | 3 of 36 results | Mar 24, 2004 | Oct 19, 2022 |
| Calcium 1016 | Inorganic Chemical | 3 of 3 results | Feb 19, 2009 | Feb 19, 2009 |
| Potassium 1042 | Inorganic Chemical | 3 of 3 results | Feb 19, 2009 | Feb 19, 2009 |
| Residue, Total, Filterable 1057 | Water Quality | 3 of 3 results | Feb 19, 2009 | Feb 19, 2009 |
| Alkalinity, Caco3 Stability 1067 | Water Quality | 3 of 3 results | Feb 19, 2009 | Feb 19, 2009 |
| Carbon Dioxide 1901 | Water Quality | 3 of 3 results | Feb 19, 2009 | Feb 19, 2009 |
| Color 1905 | Water Quality | 3 of 3 results | Feb 19, 2009 | Feb 19, 2009 |
| Hardness, Total (As Caco3) 1915 | Water Quality | 3 of 3 results | Feb 19, 2009 | Feb 19, 2009 |
| Alkalinity, Total 1927 | Water Quality | 3 of 3 results | Feb 19, 2009 | Feb 19, 2009 |
| Iron, Field Result FEFD | Inorganic Chemical | 3 of 3 results | Feb 19, 2009 | Feb 19, 2009 |
| Calculated Sodium NACA | Water Quality | 3 of 3 results | Feb 19, 2009 | Feb 19, 2009 |
| PH, Field Result PHFD | Water Quality | 3 of 3 results | Feb 19, 2009 | Feb 19, 2009 |
| Monobromoacetic Acid 2453 | Organic Chemical | 2 of 28 results | Jul 2, 2008 | Sep 2, 2009 |
| Chloride 1017 | Inorganic Chemical | 2 of 3 results | Feb 19, 2009 | Feb 19, 2009 |
| Manganese 1032 | Inorganic Chemical | 2 of 3 results | Feb 19, 2009 | Feb 19, 2009 |
| PH 1925 | Water Quality | 2 of 2 results | Feb 19, 2009 | Feb 19, 2009 |
| Bromoform 2942 | Organic Chemical | 1 of 31 results | Jun 29, 2026 | Jun 29, 2026 |
| Mercury 1035 | Inorganic Chemical | 1 of 35 results | Dec 19, 2016 | Dec 19, 2016 |
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 281–290 of 419 samples, newest first — collected July 28, 2011 to August 24, 2011. The summary above covers all 419.
24 results from the 10 samples listed here: 20 detected, 4 not detected. Across the whole record it is 537 of 3,177. 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 |
|---|---|---|
|
||
| 0.0624 mg/l , sample collected Aug 24, 2011, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
| 0.0011 mg/l , sample collected Aug 24, 2011, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
|
||
| 0.1434 mg/l , sample collected Aug 24, 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 Aug 24, 2011, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
|
||
| 0.1312 mg/l , sample collected Aug 24, 2011, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
| 0.0005 mg/l , sample collected Aug 24, 2011, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
|
||
| 0.0713 mg/l , sample collected Aug 24, 2011, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
| 0.0009 mg/l , sample collected Aug 24, 2011, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
|
||
| 0.0394 mg/l , sample collected Aug 24, 2011, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
| 0.0054 mg/l , sample collected Aug 24, 2011, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
|
||
| 0.3257 mg/l , sample collected Aug 24, 2011, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
| 0.0039 mg/l , sample collected Aug 24, 2011, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
|
||
| 0.1765 mg/l , sample collected Aug 24, 2011, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
| 0.0019 mg/l , sample collected Aug 24, 2011, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
|
||
| 0.2419 mg/l , sample collected Aug 24, 2011, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
| 0.002 mg/l , sample collected Aug 24, 2011, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
|
||
| 0.2162 mg/l , sample collected Aug 24, 2011, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
| 0.0009 mg/l , sample collected Aug 24, 2011, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2009 – Dec 31, 2011 |
|
||
| Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Jul 28, 2011 12:00, sampling point MRT000 | Monochloroacetic Acid 2450 EPA method 552.2 | Not recorded |
| 0.014 mg/l , sample collected Jul 28, 2011 12:00, sampling point MRT000 | Dichloroacetic Acid 2451 EPA method 552.2 | Not recorded |
| 0.012 mg/l , sample collected Jul 28, 2011 12:00, 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 28, 2011 12:00, 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 28, 2011 12:00, sampling point MRT000 | Dibromoacetic Acid 2454 EPA method 552.2 | Not recorded |
| 0.026 mg/l , sample collected Jul 28, 2011 12:00, sampling point MRT000 | Total Haloacetic Acids (Haa5) 2456 | Jan 1, 2011 – Dec 31, 2011 |
-
- Collected
- Aug 24, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110824-112PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2009 – Dec 31, 2011
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0624 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0011 mg/l
-
- Collected
- Aug 24, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110824-120PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2009 – Dec 31, 2011
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.1434 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Aug 24, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110824-119PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2009 – Dec 31, 2011
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.1312 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0005 mg/l
-
- Collected
- Aug 24, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110824-116PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2009 – Dec 31, 2011
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0713 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0009 mg/l
-
- Collected
- Aug 24, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110824-115PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2009 – Dec 31, 2011
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0394 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0054 mg/l
-
- Collected
- Aug 24, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110824-117PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2009 – Dec 31, 2011
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.3257 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0039 mg/l
-
- Collected
- Aug 24, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110824-114PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2009 – Dec 31, 2011
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.1765 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0019 mg/l
-
- Collected
- Aug 24, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110824-113PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2009 – Dec 31, 2011
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.2419 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.002 mg/l
-
- Collected
- Aug 24, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110824-111PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2009 – Dec 31, 2011
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.2162 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0009 mg/l
-
- Collected
- Jul 28, 2011 12:00
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 110729-014HA
- 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
- 0.014 mg/l
- Monitoring period
- Not recorded
-
Trichloroacetic Acid 2452 EPA method 552.2
- Result
- 0.012 mg/l
- 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
- 0.026 mg/l
- Monitoring period
- Jan 1, 2011 – Dec 31, 2011
Routine (10).