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
MS0090005 , City of Houston
20 of the 58 analytes this system has been tested for have been detected at least once, across 544 samples on record.
The other 38 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 544 samples on record, detections range from July 3, 1992 to July 27, 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 | 277 of 324 results | Jul 3, 1992 | Jun 27, 2024 |
| Lead 1030 | Inorganic Chemical | 252 of 324 results | Jul 3, 1992 | Jun 27, 2024 |
| Barium 1010 | Inorganic Chemical | 33 of 33 results | Jul 16, 2002 | Jan 27, 2025 |
| Fluoride 1025 | Inorganic Chemical | 33 of 33 results | Jul 16, 2002 | Jan 27, 2025 |
| Chromium 1020 | Inorganic Chemical | 17 of 33 results | Jul 16, 2002 | Apr 8, 2020 |
| Selenium 1045 | Inorganic Chemical | 17 of 33 results | Jul 16, 2002 | Apr 8, 2020 |
| TTHM 2950 | Organic Chemical | 16 of 23 results | Jul 12, 2007 | Jul 27, 2026 |
| Arsenic 1005 | Inorganic Chemical | 16 of 33 results | Feb 16, 2005 | Jan 27, 2025 |
| Bromoform 2942 | Organic Chemical | 10 of 18 results | May 13, 2019 | Jul 27, 2026 |
| Sodium 1052 | Inorganic Chemical | 9 of 9 results | Sep 24, 2019 | Oct 14, 2024 |
| Nickel 1036 | Inorganic Chemical | 9 of 33 results | Jan 12, 2004 | Apr 8, 2020 |
| Nitrite 1041 | Inorganic Chemical | 8 of 69 results | Apr 11, 2007 | Jan 10, 2022 |
| Dibromochloromethane 2944 | Organic Chemical | 5 of 18 results | May 13, 2019 | Jul 27, 2026 |
| Nitrate-Nitrite 1038 | Inorganic Chemical | 4 of 69 results | Apr 11, 2007 | May 7, 2008 |
| Total Haloacetic Acids (Haa5) 2456 | Organic Chemical | 3 of 21 results | Jul 12, 2007 | Aug 20, 2014 |
| Thallium, Total 1085 | Inorganic Chemical | 2 of 33 results | Apr 8, 2020 | Apr 8, 2020 |
| Dibromoacetic Acid 2454 | Organic Chemical | 1 of 15 results | Dec 20, 2023 | Dec 20, 2023 |
| Monobromoacetic Acid 2453 | Organic Chemical | 1 of 15 results | Aug 20, 2014 | Aug 20, 2014 |
| Nitrate 1040 | Inorganic Chemical | 1 of 69 results | Jun 7, 2006 | Jun 7, 2006 |
| Cadmium 1015 | Inorganic Chemical | 1 of 33 results | Feb 16, 2005 | Feb 16, 2005 |
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 481–490 of 544 samples, newest first — collected January 6, 1993 to January 7, 1993. The summary above covers all 544.
20 results from the 10 samples listed here: 14 detected, 6 not detected. Across the whole record it is 715 of 1,955. 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 |
|---|---|---|
|
||
| 0.157 mg/l , sample collected Jan 7, 1993, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.003 mg/l , sample collected Jan 7, 1993, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| Not detected below 0.02 mg/l Method Detection Limit , sample collected Jan 7, 1993, sampling point DS000 | Copper, Free 1022 | Not recorded |
| Not detected below 0.001 mg/l Method Detection Limit , sample collected Jan 7, 1993, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.05 mg/l , sample collected Jan 6, 1993, sampling point DS000 | Copper, Free 1022 | Not recorded |
| Not detected below 0.001 mg/l Method Detection Limit , sample collected Jan 6, 1993, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| Not detected below 0.02 mg/l Method Detection Limit , sample collected Jan 6, 1993, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.001 mg/l , sample collected Jan 6, 1993, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.119 mg/l , sample collected Jan 6, 1993, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.036 mg/l , sample collected Jan 6, 1993, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| Not detected below 0.02 mg/l Method Detection Limit , sample collected Jan 6, 1993, sampling point DS000 | Copper, Free 1022 | Not recorded |
| Not detected below 0.001 mg/l Method Detection Limit , sample collected Jan 6, 1993, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.069 mg/l , sample collected Jan 6, 1993, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.002 mg/l , sample collected Jan 6, 1993, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.12 mg/l , sample collected Jan 6, 1993, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.002 mg/l , sample collected Jan 6, 1993, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.065 mg/l , sample collected Jan 6, 1993, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.003 mg/l , sample collected Jan 6, 1993, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.104 mg/l , sample collected Jan 6, 1993, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.001 mg/l , sample collected Jan 6, 1993, sampling point DS000 | Lead 1030 | Not recorded |
-
- Collected
- Jan 7, 1993
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 930108-02
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.157 mg/l
-
Lead 1030
- Result
- 0.003 mg/l
-
- Collected
- Jan 7, 1993
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 930108-01
- 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
- Jan 6, 1993
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 930107-20
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.05 mg/l
-
Lead 1030
- Result
- Not detected below 0.001 mg/l Method Detection Limit
-
- Collected
- Jan 6, 1993
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 930107-19
- 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
- Jan 6, 1993
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 930107-18
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.119 mg/l
-
Lead 1030
- Result
- 0.036 mg/l
-
- Collected
- Jan 6, 1993
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 930107-17
- 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
- Jan 6, 1993
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 930107-16
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.069 mg/l
-
Lead 1030
- Result
- 0.002 mg/l
-
- Collected
- Jan 6, 1993
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 930107-15
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.12 mg/l
-
Lead 1030
- Result
- 0.002 mg/l
-
- Collected
- Jan 6, 1993
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 930107-14
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.065 mg/l
-
Lead 1030
- Result
- 0.003 mg/l
-
- Collected
- Jan 6, 1993
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 930107-13
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.104 mg/l
-
Lead 1030
- Result
- 0.001 mg/l
Routine (10).