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.
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 |
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 261–270 of 314 samples, newest first — collected July 7, 2010 to October 20, 2010. The summary above covers all 314.
29 results from the 10 samples listed here: 13 detected, 16 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.
| Result | Analyte | Monitoring period |
|---|---|---|
|
||
| 0.0803 mg/l , sample collected Oct 20, 2010, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jul 1, 2010 – Dec 31, 2010 |
| 0.0006 mg/l , sample collected Oct 20, 2010, sampling point DS000 | Lead 1030 EPA method 200.8 | Jul 1, 2010 – Dec 31, 2010 |
|
||
| 0.0427 mg/l , sample collected Oct 20, 2010, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jul 1, 2010 – Dec 31, 2010 |
| 0.0074 mg/l , sample collected Oct 20, 2010, sampling point DS000 | Lead 1030 EPA method 200.8 | Jul 1, 2010 – Dec 31, 2010 |
|
||
| 0.0699 mg/l , sample collected Oct 19, 2010, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jul 1, 2010 – Dec 31, 2010 |
| 0.0071 mg/l , sample collected Oct 19, 2010, sampling point DS000 | Lead 1030 EPA method 200.8 | Jul 1, 2010 – Dec 31, 2010 |
|
||
| 0.0236 mg/l , sample collected Oct 19, 2010, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jul 1, 2010 – Dec 31, 2010 |
| 0.0016 mg/l , sample collected Oct 19, 2010, sampling point DS000 | Lead 1030 EPA method 200.8 | Jul 1, 2010 – Dec 31, 2010 |
|
||
| 0.1605 mg/l , sample collected Oct 19, 2010, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jul 1, 2010 – Dec 31, 2010 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 19, 2010, sampling point DS000 | Lead 1030 EPA method 200.8 | Jul 1, 2010 – Dec 31, 2010 |
|
||
| 0.0806 mg/l , sample collected Oct 19, 2010, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jul 1, 2010 – Dec 31, 2010 |
| 0.0145 mg/l , sample collected Oct 19, 2010, sampling point DS000 | Lead 1030 EPA method 200.8 | Jul 1, 2010 – Dec 31, 2010 |
|
||
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 16, 2010, sampling point DS000 | Chloroform 2941 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 16, 2010, sampling point DS000 | Bromoform 2942 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 16, 2010, sampling point DS000 | Bromodichloromethane 2943 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 16, 2010, sampling point DS000 | Dibromochloromethane 2944 EPA method 524.2 | Not recorded |
| 0 This result is recorded as a detection, and the figure the agency wrote — "0.00" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here. The agency recorded a value but no unit of measure for it. The unit is NOT inferable from the analyte: many analytes are reported in more than one unit — TTHM and HAA5 in both MG/L and UG/L — so there is no per-analyte default to fall back on. The number is published as it stands and must not be compared to a limit. The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected Sep 16, 2010, sampling point DS000 | TTHM 2950 EPA method 524.2 | Jan 1, 2010 – Dec 31, 2010 |
|
||
| Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Sep 16, 2010, sampling point DS000 | Monochloroacetic Acid 2450 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 16, 2010, sampling point DS000 | Dichloroacetic Acid 2451 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 16, 2010, sampling point DS000 | Trichloroacetic Acid 2452 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 16, 2010, sampling point DS000 | Monobromoacetic Acid 2453 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 16, 2010, sampling point DS000 | Dibromoacetic Acid 2454 EPA method 552.2 | Not recorded |
| 0 This result is recorded as a detection, and the figure the agency wrote — "0.00" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here. The agency recorded a value but no unit of measure for it. The unit is NOT inferable from the analyte: many analytes are reported in more than one unit — TTHM and HAA5 in both MG/L and UG/L — so there is no per-analyte default to fall back on. The number is published as it stands and must not be compared to a limit. The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected Sep 16, 2010, sampling point DS000 | Total Haloacetic Acids (Haa5) 2456 | Jan 1, 2010 – Dec 31, 2010 |
|
||
| Not detected below 0.25 mg/l Minimum Reporting Level , sample collected Jul 7, 2010, sampling point WL001 | Nitrate-Nitrite 1038 EPA method 353.2 | Jan 1, 2010 – Dec 31, 2010 |
| Not detected below 0.2 mg/l Minimum Reporting Level , sample collected Jul 7, 2010, sampling point WL001 | Nitrate 1040 EPA method 353.2 | Jan 1, 2010 – Dec 31, 2010 |
| Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Jul 7, 2010, sampling point WL001 | Nitrite 1041 EPA method 353.2 | Jan 1, 2010 – Dec 31, 2010 |
|
||
| Not detected below 0.25 mg/l Minimum Reporting Level , sample collected Jul 7, 2010, sampling point WL002 | Nitrate-Nitrite 1038 EPA method 353.2 | Jan 1, 2010 – Dec 31, 2010 |
| Not detected below 0.2 mg/l Minimum Reporting Level , sample collected Jul 7, 2010, sampling point WL002 | Nitrate 1040 EPA method 353.2 | Jan 1, 2010 – Dec 31, 2010 |
| Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Jul 7, 2010, sampling point WL002 | Nitrite 1041 EPA method 353.2 | Jan 1, 2010 – Dec 31, 2010 |
-
- Collected
- Oct 20, 2010
- Sampling point
- DS000
- Sample type
- Routine
- Lab sample
- 101021-007PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jul 1, 2010 – Dec 31, 2010
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0803 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0006 mg/l
-
- Collected
- Oct 20, 2010
- Sampling point
- DS000
- Sample type
- Routine
- Lab sample
- 101021-006PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jul 1, 2010 – Dec 31, 2010
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0427 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0074 mg/l
-
- Collected
- Oct 19, 2010
- Sampling point
- DS000
- Sample type
- Routine
- Lab sample
- 101021-021PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jul 1, 2010 – Dec 31, 2010
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0699 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0071 mg/l
-
- Collected
- Oct 19, 2010
- Sampling point
- DS000
- Sample type
- Routine
- Lab sample
- 101021-019PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jul 1, 2010 – Dec 31, 2010
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0236 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0016 mg/l
-
- Collected
- Oct 19, 2010
- Sampling point
- DS000
- Sample type
- Routine
- Lab sample
- 101021-014PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jul 1, 2010 – Dec 31, 2010
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.1605 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Oct 19, 2010
- Sampling point
- DS000
- Sample type
- Routine
- Lab sample
- 101021-012PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jul 1, 2010 – Dec 31, 2010
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0806 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0145 mg/l
-
- Collected
- Sep 16, 2010
- Sampling point
- DS000
- Sample type
- Routine
- Lab sample
- 100917-001TH
- 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 EPA method 524.2
- Result
- 0 This result is recorded as a detection, and the figure the agency wrote — "0.00" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here. The agency recorded a value but no unit of measure for it. The unit is NOT inferable from the analyte: many analytes are reported in more than one unit — TTHM and HAA5 in both MG/L and UG/L — so there is no per-analyte default to fall back on. The number is published as it stands and must not be compared to a limit. The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType.
- Monitoring period
- Jan 1, 2010 – Dec 31, 2010
-
- Collected
- Sep 16, 2010
- Sampling point
- DS000
- Sample type
- Routine
- Lab sample
- 100917-001HA
- 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
- 0 This result is recorded as a detection, and the figure the agency wrote — "0.00" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here. The agency recorded a value but no unit of measure for it. The unit is NOT inferable from the analyte: many analytes are reported in more than one unit — TTHM and HAA5 in both MG/L and UG/L — so there is no per-analyte default to fall back on. The number is published as it stands and must not be compared to a limit. The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType.
- Monitoring period
- Jan 1, 2010 – Dec 31, 2010
-
- Collected
- Jul 7, 2010
- Sampling point
- WL001 Well W001
- Sample type
- Routine
- Lab sample
- 100708-074NI
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2010 – Dec 31, 2010
-
Nitrate-Nitrite 1038 EPA method 353.2
- Result
- Not detected below 0.25 mg/l Minimum Reporting Level
-
Nitrate 1040 EPA method 353.2
- Result
- Not detected below 0.2 mg/l Minimum Reporting Level
-
Nitrite 1041 EPA method 353.2
- Result
- Not detected below 0.05 mg/l Minimum Reporting Level
-
- Collected
- Jul 7, 2010
- Sampling point
- WL002 Well W002
- Sample type
- Routine
- Lab sample
- 100708-073NI
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2010 – Dec 31, 2010
-
Nitrate-Nitrite 1038 EPA method 353.2
- Result
- Not detected below 0.25 mg/l Minimum Reporting Level
-
Nitrate 1040 EPA method 353.2
- Result
- Not detected below 0.2 mg/l Minimum Reporting Level
-
Nitrite 1041 EPA method 353.2
- Result
- Not detected below 0.05 mg/l Minimum Reporting Level
Routine (10).