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
MS0300163 , Helena Utility District
20 of the 51 analytes this system has been tested for have been detected at least once, across 314 samples on record.
The other 31 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 314 samples on record, detections range from September 22, 2003 to July 22, 2026. These figures cover the whole record; the list of samples further down is narrowed.
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 | 216 of 216 results | Oct 19, 2010 | Jul 22, 2026 |
| Lead 1030 | Inorganic Chemical | 141 of 216 results | Oct 19, 2010 | Jul 22, 2026 |
| TTHM 2950 | Organic Chemical | 24 of 27 results | Sep 16, 2010 | Jun 30, 2026 |
| Total Haloacetic Acids (Haa5) 2456 | Organic Chemical | 21 of 27 results | Sep 16, 2010 | Jun 30, 2026 |
| Dichloroacetic Acid 2451 | Organic Chemical | 12 of 17 results | Oct 1, 2013 | Jun 30, 2026 |
| Chloroform 2941 | Organic Chemical | 12 of 17 results | Oct 1, 2013 | Jun 30, 2026 |
| Dibromochloromethane 2944 | Organic Chemical | 12 of 17 results | Oct 1, 2013 | Jun 30, 2026 |
| Barium 1010 | Inorganic Chemical | 10 of 10 results | Sep 22, 2003 | Nov 5, 2009 |
| Fluoride 1025 | Inorganic Chemical | 10 of 10 results | Sep 22, 2003 | Nov 5, 2009 |
| Bromodichloromethane 2943 | Organic Chemical | 9 of 17 results | Oct 1, 2013 | Jun 30, 2026 |
| Trichloroacetic Acid 2452 | Organic Chemical | 6 of 17 results | Oct 1, 2013 | Jun 30, 2026 |
| Chromium 1020 | Inorganic Chemical | 5 of 10 results | Sep 22, 2003 | Dec 12, 2005 |
| Monochloroacetic Acid 2450 | Organic Chemical | 4 of 17 results | Apr 9, 2014 | Jun 25, 2018 |
| Dibromoacetic Acid 2454 | Organic Chemical | 3 of 17 results | Oct 1, 2013 | Sep 27, 2016 |
| Bromoform 2942 | Organic Chemical | 3 of 17 results | Jul 7, 2014 | Sep 27, 2016 |
| Nickel 1036 | Inorganic Chemical | 2 of 10 results | Nov 5, 2009 | Nov 5, 2009 |
| Selenium 1045 | Inorganic Chemical | 2 of 10 results | Mar 14, 2005 | Dec 12, 2005 |
| Arsenic 1005 | Inorganic Chemical | 1 of 10 results | Dec 12, 2005 | Dec 12, 2005 |
| Cadmium 1015 | Inorganic Chemical | 1 of 10 results | Dec 12, 2005 | Dec 12, 2005 |
| Sulfate 1055 | Inorganic Chemical | 1 of 4 results | Sep 22, 2003 | Sep 22, 2003 |
Showing samples collected between September 26, 2024 and September 26, 2026. That is this page’s default, not a limit on what the agency records.
Choose a date range
The most recent samples, result by result
The table below lists 1–10 of 21 samples, newest first — collected April 1, 2025 to July 22, 2026. The summary above covers all 21.
35 results from the 10 samples listed here: 24 detected, 11 not detected. Across the whole record it is 495 of 1,060. A sample is analysed for many analytes at once, so one sample appears on as many rows as it had results.
We withheld the location of 7 sampling points below. The location on record identifies a private home, and we do not publish those. That is our decision, not the agency’s. The sampling point, its type and every result taken there are published unchanged.
| Result | Analyte | Monitoring period |
|---|---|---|
|
||
| 288 ug/l , sample collected Jul 22, 2026, sampling point LC0002 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2026 – Dec 31, 2026 |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 22, 2026, sampling point LC0002 | Lead 1030 EPA method 200.8 | Jan 1, 2026 – Dec 31, 2026 |
|
||
| 36 ug/l , sample collected Jul 22, 2026, sampling point LC0006 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2026 – Dec 31, 2026 |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 22, 2026, sampling point LC0006 | Lead 1030 EPA method 200.8 | Jan 1, 2026 – Dec 31, 2026 |
|
||
| 174 ug/l , sample collected Jul 22, 2026, sampling point LC0092 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2026 – Dec 31, 2026 |
| 1.3 ug/l , sample collected Jul 22, 2026, sampling point LC0092 | Lead 1030 EPA method 200.8 | Jan 1, 2026 – Dec 31, 2026 |
|
||
| 355 ug/l , sample collected Jul 22, 2026, sampling point LC0030 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2026 – Dec 31, 2026 |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 22, 2026, sampling point LC0030 | Lead 1030 EPA method 200.8 | Jan 1, 2026 – Dec 31, 2026 |
|
||
| 109 ug/l , sample collected Jul 22, 2026, sampling point LC0012 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2026 – Dec 31, 2026 |
| 1.9 ug/l , sample collected Jul 22, 2026, sampling point LC0012 | Lead 1030 EPA method 200.8 | Jan 1, 2026 – Dec 31, 2026 |
|
||
| Not detected below 2 ug/l Minimum Reporting Level , sample collected Jun 30, 2026 11:30, sampling point DS000 | Monochloroacetic Acid 2450 EPA method 552.2 | Not recorded |
| 21 ug/l , sample collected Jun 30, 2026 11:30, sampling point DS000 | Dichloroacetic Acid 2451 EPA method 552.2 | Not recorded |
| 31 ug/l , sample collected Jun 30, 2026 11:30, sampling point DS000 | Trichloroacetic Acid 2452 EPA method 552.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 30, 2026 11:30, sampling point DS000 | Monobromoacetic Acid 2453 EPA method 552.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 30, 2026 11:30, sampling point DS000 | Dibromoacetic Acid 2454 EPA method 552.2 | Not recorded |
| 52 ug/l , sample collected Jun 30, 2026 11:30, sampling point DS000 | Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 | Jan 1, 2026 – Dec 31, 2026 |
| 60 ug/l , sample collected Jun 30, 2026 11:30, sampling point DS000 | Chloroform 2941 EPA method 524.2 | Not recorded |
| Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2026 11:30, sampling point DS000 | Bromoform 2942 EPA method 524.2 | Not recorded |
| 9.5 ug/l , sample collected Jun 30, 2026 11:30, sampling point DS000 | Bromodichloromethane 2943 EPA method 524.2 | Not recorded |
| 1.3 ug/l , sample collected Jun 30, 2026 11:30, sampling point DS000 | Dibromochloromethane 2944 EPA method 524.2 | Not recorded |
| 70.8 ug/l , sample collected Jun 30, 2026 11:30, sampling point DS000 | TTHM 2950 EPA method 524.2 | Jan 1, 2026 – Dec 31, 2026 |
|
||
| Not detected below 2 ug/l Minimum Reporting Level , sample collected Jun 30, 2026 11:15, sampling point SMH | Monochloroacetic Acid 2450 EPA method 552.2 | Not recorded |
| 18 ug/l , sample collected Jun 30, 2026 11:15, sampling point SMH | Dichloroacetic Acid 2451 EPA method 552.2 | Not recorded |
| 28 ug/l , sample collected Jun 30, 2026 11:15, sampling point SMH | Trichloroacetic Acid 2452 EPA method 552.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 30, 2026 11:15, sampling point SMH | Monobromoacetic Acid 2453 EPA method 552.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 30, 2026 11:15, sampling point SMH | Dibromoacetic Acid 2454 EPA method 552.2 | Not recorded |
| 46 ug/l , sample collected Jun 30, 2026 11:15, sampling point SMH | Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 | Jan 1, 2026 – Dec 31, 2026 |
| 52 ug/l , sample collected Jun 30, 2026 11:15, sampling point SMH | Chloroform 2941 EPA method 524.2 | Not recorded |
| Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2026 11:15, sampling point SMH | Bromoform 2942 EPA method 524.2 | Not recorded |
| 8.5 ug/l , sample collected Jun 30, 2026 11:15, sampling point SMH | Bromodichloromethane 2943 EPA method 524.2 | Not recorded |
| 1.1 ug/l , sample collected Jun 30, 2026 11:15, sampling point SMH | Dibromochloromethane 2944 EPA method 524.2 | Not recorded |
| 61.6 ug/l , sample collected Jun 30, 2026 11:15, sampling point SMH | TTHM 2950 EPA method 524.2 | Jan 1, 2026 – Dec 31, 2026 |
|
||
| 18.8 ug/l , sample collected Apr 1, 2025 14:35, sampling point SMT | Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 | Jan 1, 2025 – Dec 31, 2025 |
|
||
| 20 ug/l , sample collected Apr 1, 2025 14:20, sampling point SMH | Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 | Jan 1, 2025 – Dec 31, 2025 |
|
||
| 41.1 ug/l , sample collected Apr 1, 2025 14:30, sampling point SMT | TTHM 2950 EPA method 524.2 | Jan 1, 2025 – Dec 31, 2025 |
-
- Collected
- Jul 22, 2026
- Sampling point
- LC0002 Location withheld
- Sample type
- Routine
- Lab sample
- 35053470005
- Laboratory
- Pace Analytical Services, LLC
- Monitoring period
- Jan 1, 2026 – Dec 31, 2026
-
Copper, Free 1022 EPA method 200.8
- Result
- 288 ug/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 1 ug/l Minimum Reporting Level
-
- Collected
- Jul 22, 2026
- Sampling point
- LC0006 Location withheld
- Sample type
- Routine
- Lab sample
- 35053470004
- Laboratory
- Pace Analytical Services, LLC
- Monitoring period
- Jan 1, 2026 – Dec 31, 2026
-
Copper, Free 1022 EPA method 200.8
- Result
- 36 ug/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 1 ug/l Minimum Reporting Level
-
- Collected
- Jul 22, 2026
- Sampling point
- LC0092 Location withheld
- Sample type
- Routine
- Lab sample
- 35053470003
- Laboratory
- Pace Analytical Services, LLC
- Monitoring period
- Jan 1, 2026 – Dec 31, 2026
-
Copper, Free 1022 EPA method 200.8
- Result
- 174 ug/l
-
Lead 1030 EPA method 200.8
- Result
- 1.3 ug/l
-
- Collected
- Jul 22, 2026
- Sampling point
- LC0030 Location withheld
- Sample type
- Routine
- Lab sample
- 35053470002
- Laboratory
- Pace Analytical Services, LLC
- Monitoring period
- Jan 1, 2026 – Dec 31, 2026
-
Copper, Free 1022 EPA method 200.8
- Result
- 355 ug/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 1 ug/l Minimum Reporting Level
-
- Collected
- Jul 22, 2026
- Sampling point
- LC0012 Location withheld
- Sample type
- Routine
- Lab sample
- 35053470001
- Laboratory
- Pace Analytical Services, LLC
- Monitoring period
- Jan 1, 2026 – Dec 31, 2026
-
Copper, Free 1022 EPA method 200.8
- Result
- 109 ug/l
-
Lead 1030 EPA method 200.8
- Result
- 1.9 ug/l
-
- Collected
- Jun 30, 2026 11:30
- Sampling point
- DS000
- Sample type
- Routine
- Lab sample
- 810-198040-2
- Laboratory
- Eurofins Eaton Analytical South Bend in
-
Monochloroacetic Acid 2450 EPA method 552.2
- Result
- Not detected below 2 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dichloroacetic Acid 2451 EPA method 552.2
- Result
- 21 ug/l
- Monitoring period
- Not recorded
-
Trichloroacetic Acid 2452 EPA method 552.2
- Result
- 31 ug/l
- Monitoring period
- Not recorded
-
Monobromoacetic Acid 2453 EPA method 552.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dibromoacetic Acid 2454 EPA method 552.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Total Haloacetic Acids (Haa5) 2456 EPA method 552.2
- Result
- 52 ug/l
- Monitoring period
- Jan 1, 2026 – Dec 31, 2026
-
Chloroform 2941 EPA method 524.2
- Result
- 60 ug/l
- Monitoring period
- Not recorded
-
Bromoform 2942 EPA method 524.2
- Result
- Not detected below 0.5 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Bromodichloromethane 2943 EPA method 524.2
- Result
- 9.5 ug/l
- Monitoring period
- Not recorded
-
Dibromochloromethane 2944 EPA method 524.2
- Result
- 1.3 ug/l
- Monitoring period
- Not recorded
-
TTHM 2950 EPA method 524.2
- Result
- 70.8 ug/l
- Monitoring period
- Jan 1, 2026 – Dec 31, 2026
-
- Collected
- Jun 30, 2026 11:15
- Sampling point
- SMH Location withheld
- Sample type
- Routine
- Lab sample
- 810-198040-1
- Laboratory
- Eurofins Eaton Analytical South Bend in
-
Monochloroacetic Acid 2450 EPA method 552.2
- Result
- Not detected below 2 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dichloroacetic Acid 2451 EPA method 552.2
- Result
- 18 ug/l
- Monitoring period
- Not recorded
-
Trichloroacetic Acid 2452 EPA method 552.2
- Result
- 28 ug/l
- Monitoring period
- Not recorded
-
Monobromoacetic Acid 2453 EPA method 552.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dibromoacetic Acid 2454 EPA method 552.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Total Haloacetic Acids (Haa5) 2456 EPA method 552.2
- Result
- 46 ug/l
- Monitoring period
- Jan 1, 2026 – Dec 31, 2026
-
Chloroform 2941 EPA method 524.2
- Result
- 52 ug/l
- Monitoring period
- Not recorded
-
Bromoform 2942 EPA method 524.2
- Result
- Not detected below 0.5 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Bromodichloromethane 2943 EPA method 524.2
- Result
- 8.5 ug/l
- Monitoring period
- Not recorded
-
Dibromochloromethane 2944 EPA method 524.2
- Result
- 1.1 ug/l
- Monitoring period
- Not recorded
-
TTHM 2950 EPA method 524.2
- Result
- 61.6 ug/l
- Monitoring period
- Jan 1, 2026 – Dec 31, 2026
-
- Collected
- Apr 1, 2025 14:35
- Sampling point
- SMT Location withheld
- Sample type
- Routine
- Lab sample
- HA-250402-016
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2025 – Dec 31, 2025
-
Total Haloacetic Acids (Haa5) 2456 EPA method 552.2
- Result
- 18.8 ug/l
-
- Collected
- Apr 1, 2025 14:20
- Sampling point
- SMH Location withheld
- Sample type
- Routine
- Lab sample
- HA-250402-015
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2025 – Dec 31, 2025
-
Total Haloacetic Acids (Haa5) 2456 EPA method 552.2
- Result
- 20 ug/l
-
- Collected
- Apr 1, 2025 14:30
- Sampling point
- SMT Location withheld
- Sample type
- Routine
- Lab sample
- TH-250402-015
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2025 – Dec 31, 2025
-
TTHM 2950 EPA method 524.2
- Result
- 41.1 ug/l
Routine (10).