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
MS0490016 , Hays Creek W/A-Minerva
23 of the 57 analytes this system has been tested for have been detected at least once, across 114 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 114 samples on record, detections range from October 8, 2003 to September 12, 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 | 35 of 35 results | Sep 22, 2004 | Sep 11, 2023 |
| Lead 1030 | Inorganic Chemical | 25 of 35 results | Sep 22, 2004 | Jul 29, 2020 |
| Barium 1010 | Inorganic Chemical | 9 of 9 results | Oct 8, 2003 | Mar 17, 2025 |
| Fluoride 1025 | Inorganic Chemical | 9 of 9 results | Oct 8, 2003 | Mar 17, 2025 |
| TTHM 2950 | Organic Chemical | 7 of 12 results | Jul 19, 2004 | Sep 12, 2025 |
| Total Haloacetic Acids (Haa5) 2456 | Organic Chemical | 4 of 10 results | Jun 16, 2010 | Jun 26, 2023 |
| Chromium 1020 | Inorganic Chemical | 4 of 9 results | Apr 4, 2005 | May 6, 2019 |
| Chloroform 2941 | Organic Chemical | 3 of 7 results | Aug 27, 2007 | Sep 12, 2025 |
| Sodium 1052 | Inorganic Chemical | 3 of 3 results | Sep 16, 2019 | Feb 24, 2025 |
| Bromodichloromethane 2943 | Organic Chemical | 2 of 7 results | Jul 13, 2016 | Sep 12, 2025 |
| Dichloroacetic Acid 2451 | Organic Chemical | 2 of 6 results | Jul 13, 2016 | Sep 11, 2019 |
| Nickel 1036 | Inorganic Chemical | 2 of 9 results | Apr 29, 2013 | May 6, 2019 |
| Monochloroacetic Acid 2450 | Organic Chemical | 1 of 6 results | Sep 11, 2019 | Sep 11, 2019 |
| Monobromoacetic Acid 2453 | Organic Chemical | 1 of 6 results | Sep 11, 2019 | Sep 11, 2019 |
| Trichloroacetic Acid 2452 | Organic Chemical | 1 of 6 results | Jul 13, 2016 | Jul 13, 2016 |
| Dibromoacetic Acid 2454 | Organic Chemical | 1 of 6 results | Jul 13, 2016 | Jul 13, 2016 |
| Dibromochloromethane 2944 | Organic Chemical | 1 of 7 results | Jul 13, 2016 | Jul 13, 2016 |
| Gross Alpha Particle Activity 4109 | Radionuclide | 1 of 4 results | Sep 11, 2012 | Sep 11, 2012 |
| Combined Radium (-226 & -228) 4010 | Radionuclide | 1 of 4 results | Dec 21, 2011 | Dec 21, 2011 |
| Radium-228 4030 | Radionuclide | 1 of 4 results | Dec 21, 2011 | Dec 21, 2011 |
| Nitrate-Nitrite 1038 | Inorganic Chemical | 1 of 22 results | May 16, 2007 | May 16, 2007 |
| Nitrate 1040 | Inorganic Chemical | 1 of 22 results | May 16, 2007 | May 16, 2007 |
| Selenium 1045 | Inorganic Chemical | 1 of 9 results | Apr 4, 2005 | Apr 4, 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 21–30 of 114 samples, newest first — collected July 29, 2020 to May 16, 2022. The summary above covers all 114.
25 results from the 10 samples listed here: 6 detected, 19 not detected. Across the whole record it is 116 of 498. 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 0.015 mg/l Minimum Reporting Level , sample collected May 16, 2022 10:15, sampling point TF101 | Cyanide 1024 EPA method QC10204001X | Jan 1, 2020 – Dec 31, 2022 |
|
||
| 81.9 mg/l , sample collected Mar 8, 2022 11:15, sampling point TF101 | Sodium 1052 EPA method 200.7 | Not recorded |
|
||
| Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 8, 2022 11:15, sampling point TF101 | Nitrate-Nitrite 1038 EPA method QC10107041C | Jan 1, 2022 – Dec 31, 2022 |
| Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 8, 2022 11:15, sampling point TF101 | Nitrate 1040 EPA method QC10107041C | Jan 1, 2022 – Dec 31, 2022 |
| Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 8, 2022 11:15, sampling point TF101 | Nitrite 1041 EPA method QC10107041C | Jan 1, 2022 – Dec 31, 2022 |
|
||
| 1.07 ug/l , sample collected Sep 29, 2021 14:30, sampling point MRT000 | TTHM 2950 EPA method 524.2 | Jan 1, 2021 – Dec 31, 2021 |
|
||
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 7, 2021 09:32, sampling point TF101 | Combined Uranium 4006 EPA method 200.8 | Jan 1, 2013 – Dec 31, 2021 |
|
||
| Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 30, 2021 10:15, sampling point TF101 | Nitrate-Nitrite 1038 EPA method QC10107041C | Jan 1, 2021 – Dec 31, 2021 |
| Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 30, 2021 10:15, sampling point TF101 | Nitrate 1040 EPA method QC10107041C | Jan 1, 2021 – Dec 31, 2021 |
| Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 30, 2021 10:15, sampling point TF101 | Nitrite 1041 EPA method QC10107041C | Jan 1, 2021 – Dec 31, 2021 |
|
||
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 28, 2020 13:00, sampling point MRT000 | Chloroform 2941 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 28, 2020 13:00, sampling point MRT000 | Bromoform 2942 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 28, 2020 13:00, sampling point MRT000 | Bromodichloromethane 2943 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 28, 2020 13:00, sampling point MRT000 | Dibromochloromethane 2944 EPA method 524.2 | Not recorded |
| Not detected below 4 ug/l Minimum Reporting Level , sample collected Sep 28, 2020 13:00, sampling point MRT000 | TTHM 2950 | Jan 1, 2020 – Dec 31, 2020 |
|
||
| Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Sep 28, 2020 13:00, sampling point MRT000 | Monochloroacetic Acid 2450 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 28, 2020 13:00, sampling point MRT000 | Dichloroacetic Acid 2451 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 28, 2020 13:00, sampling point MRT000 | Trichloroacetic Acid 2452 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 28, 2020 13:00, sampling point MRT000 | Monobromoacetic Acid 2453 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 28, 2020 13:00, sampling point MRT000 | Dibromoacetic Acid 2454 EPA method 552.2 | Not recorded |
| Not detected below 0.006 mg/l Minimum Reporting Level , sample collected Sep 28, 2020 13:00, sampling point MRT000 | Total Haloacetic Acids (Haa5) 2456 | Jan 1, 2020 – Dec 31, 2020 |
|
||
| 0.0136 mg/l , sample collected Jul 29, 2020 07:15, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2018 – Dec 31, 2020 |
| 0.0058 mg/l , sample collected Jul 29, 2020 07:15, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2018 – Dec 31, 2020 |
|
||
| 0.0218 mg/l , sample collected Jul 29, 2020 06:30, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2018 – Dec 31, 2020 |
| 0.001 mg/l , sample collected Jul 29, 2020 06:30, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2018 – Dec 31, 2020 |
-
- Collected
- May 16, 2022 10:15
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- CN-220517-022
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2020 – Dec 31, 2022
-
Cyanide 1024 EPA method QC10204001X
- Result
- Not detected below 0.015 mg/l Minimum Reporting Level
-
- Collected
- Mar 8, 2022 11:15
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- NA-220309-004
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Sodium 1052 EPA method 200.7
- Result
- 81.9 mg/l
-
- Collected
- Mar 8, 2022 11:15
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- NI-220309-047
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2022 – Dec 31, 2022
-
Nitrate-Nitrite 1038 EPA method QC10107041C
- Result
- Not detected below 0.1 mg/l Minimum Reporting Level
-
Nitrate 1040 EPA method QC10107041C
- Result
- Not detected below 0.08 mg/l Minimum Reporting Level
-
Nitrite 1041 EPA method QC10107041C
- Result
- Not detected below 0.02 mg/l Minimum Reporting Level
-
- Collected
- Sep 29, 2021 14:30
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- TH-210930-001
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2021 – Dec 31, 2021
-
TTHM 2950 EPA method 524.2
- Result
- 1.07 ug/l
-
- Collected
- Jun 7, 2021 09:32
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- RU-210608-010
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2013 – Dec 31, 2021
-
Combined Uranium 4006 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Mar 30, 2021 10:15
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- NI-210331-043
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2021 – Dec 31, 2021
-
Nitrate-Nitrite 1038 EPA method QC10107041C
- Result
- Not detected below 0.1 mg/l Minimum Reporting Level
-
Nitrate 1040 EPA method QC10107041C
- Result
- Not detected below 0.08 mg/l Minimum Reporting Level
-
Nitrite 1041 EPA method QC10107041C
- Result
- Not detected below 0.02 mg/l Minimum Reporting Level
-
- Collected
- Sep 28, 2020 13:00
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 200929-005TH
- 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
- Result
- Not detected below 4 ug/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2020 – Dec 31, 2020
-
- Collected
- Sep 28, 2020 13:00
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 200929-005HA
- 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
- Not detected below 0.006 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2020 – Dec 31, 2020
-
- Collected
- Jul 29, 2020 07:15
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 200730-061PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2018 – Dec 31, 2020
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0136 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0058 mg/l
-
- Collected
- Jul 29, 2020 06:30
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 200730-001PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2018 – Dec 31, 2020
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0218 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.001 mg/l
Routine (10).