Public water system record
Crow Agency Water System
Serves Crow Agency, Big Horn County, MT · 2,057 people served
Federal records show 17 health-based violations and 70 monitoring/reporting issues for Crow Agency Water System in the last ten years. The most serious issue in this window was a resolved CARBON, TOTAL violation.
System profile
Source water
Surface water
ZIP
59022
EPA system ID
083090011
- Health-based violations, last 10 years
- 17
- Resolved
- 17
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 70
Key facts
- Crow Agency Water System draws water from 3 surface water intakes.
- Most recent enforcement action: boil water order by EPA, January 2024.
- Record on file since 1976, with 11 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 423 service lines.
Check whether Crow Agency Water System serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
| Contaminant | Rule family | Start date | Status | Acute |
|---|---|---|---|---|
|
CARBON, TOTAL
Treatment technique failure
|
210 | Oct 1, 2020 | Resolved | No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Oct 1, 2020 | Resolved | No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Oct 1, 2020 | Resolved | No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Oct 1, 2020 | Resolved | No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Jul 1, 2020 | Resolved | No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Jul 1, 2020 | Resolved | No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Jul 1, 2020 | Resolved | No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Jul 1, 2020 | Resolved | No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Apr 1, 2020 | Resolved | No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Apr 1, 2020 | Resolved | No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Apr 1, 2020 | Resolved | No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Apr 1, 2020 | Resolved | No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Jan 1, 2020 | Resolved | No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Oct 1, 2019 | Resolved | No |
|
Long Term 2 Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Apr 9, 2017 | Resolved | No |
|
Long Term 2 Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Mar 11, 2015 | Resolved | No |
|
Long Term 2 Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Apr 1, 2014 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Interim Enhanced Surface Water Treatment Rule
OTHER
|
Sep 23, 2025 | Active |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Jul 1, 2025 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
May 1, 2025 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Feb 1, 2025 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Jan 1, 2025 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Dec 1, 2024 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Nov 1, 2024 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2023 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Jun 1, 2023 | Resolved |
|
CARBON, TOTAL
Monitoring and reporting
|
Apr 1, 2023 | Resolved |
|
CARBON, TOTAL
Monitoring and reporting
|
Apr 1, 2023 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Mar 1, 2023 | Resolved |
|
Chromium (total)
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Nickel
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Barium
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
CYANIDE
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Beryllium, Total
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Arsenic
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Cadmium
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Thallium, Total
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Selenium
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Antimony, Total
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Mercury
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Styrene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Ethylbenzene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Toluene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Benzene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
CHLOROBENZENE
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Tetrachloroethylene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
1,1,2-Trichloroethane
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Trichloroethylene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
1,2-Dichloropropane
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Carbon tetrachloride
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
1,1,1-Trichloroethane
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
1,2-Dichloroethane
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
trans-1,2-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
1,1-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Vinyl chloride
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
p-Dichlorobenzene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
o-Dichlorobenzene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
DICHLOROMETHANE
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Xylenes, Total
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
cis-1,2-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
1,2,4-Trichlorobenzene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
CARBON, TOTAL
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
CARBON, TOTAL
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Dec 30, 2021 | Resolved |
|
CARBON, TOTAL
Monitoring and reporting
|
Apr 1, 2020 | Resolved |
|
CARBON, TOTAL
Monitoring and reporting
|
Apr 1, 2020 | Resolved |
|
CARBON, TOTAL
Monitoring and reporting
|
Oct 1, 2018 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
CARBON, TOTAL
Monitoring and reporting
|
Oct 1, 2018 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
CARBON, TOTAL
Monitoring and reporting
|
Oct 1, 2018 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
CARBON, TOTAL
Monitoring and reporting
|
Jul 1, 2018 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
CARBON, TOTAL
Monitoring and reporting
|
Jul 1, 2018 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
CARBON, TOTAL
Monitoring and reporting
|
Jul 1, 2018 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
CARBON, TOTAL
Monitoring and reporting
|
Jul 1, 2018 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
CARBON, TOTAL
Monitoring and reporting
|
Jul 1, 2018 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
CARBON, TOTAL
Monitoring and reporting
|
Jul 1, 2018 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
CARBON, TOTAL
Monitoring and reporting
|
Apr 1, 2018 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
CARBON, TOTAL
Monitoring and reporting
|
Apr 1, 2018 | Resolved |
|
CARBON, TOTAL
Monitoring and reporting
|
Apr 1, 2018 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
CARBON, TOTAL
Monitoring and reporting
|
Apr 1, 2018 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
CARBON, TOTAL
Monitoring and reporting
|
Jan 1, 2018 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
CARBON, TOTAL
Monitoring and reporting
|
Jan 1, 2018 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
CARBON, TOTAL
Monitoring and reporting
|
Jan 1, 2018 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
CARBON, TOTAL
Monitoring and reporting
|
Jan 1, 2018 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
May 1, 2017 | Resolved |
|
CARBON, TOTAL
Monitoring and reporting
|
Jan 1, 2017 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
CARBON, TOTAL
Monitoring and reporting
|
Jan 1, 2017 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Interim Enhanced Surface Water Treatment Rule
OTHER
|
Sep 6, 2016 | Resolved |
Full record since 1976
EPA's records for Crow Agency Water System go back to 1976. Before October 19, 2016 they list 11 health-based violations (9 resolved, 2 archived by EPA without a recorded fix) and 81 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1970s | 0 | 10 |
| 1990s | 0 | 12 |
| 2000s | 2 | 14 |
| 2010 to October 18, 2016 | 9 | 45 |
| October 19, 2016 to 2019 | 2 | 20 |
| 2020s | 13 | 49 |
Most recent health-based violation before October 19, 2016: Long Term 2 Enhanced Surface Water Treatment Rule, began March 2015, Resolved.
Show all 11 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Long Term 2 Enhanced Surface Water Treatment Rule
Treatment technique failure
|
Mar 11, 2015 | Resolved |
|
Long Term 2 Enhanced Surface Water Treatment Rule
Treatment technique failure
|
Apr 1, 2014 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Sep 1, 2012 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Aug 1, 2012 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Aug 1, 2012 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Jul 1, 2012 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jul 1, 2012 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
May 1, 2012 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
May 1, 2012 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Apr 1, 2006 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 2002 | Archived |
Enforcement actions
EPA took 3 formal enforcement actions against Crow Agency Water System and issued 2 boil water orders between 2015 and 2024, filed as 6 records in EPA's data. The most recent was a boil water order in January 2024.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Jan 19, 2024 | EPA | Boil water order | 1 violation |
| Apr 22, 2021 | EPA | Compliance order (no penalty) | 6 violations (6 health-based): CARBON, TOTAL |
| Jan 20, 2021 | EPA | Compliance order (no penalty) | 3 violations (3 health-based): CARBON, TOTAL |
| Apr 21, 2020 | EPA | Boil water order | 1 violation |
| Sep 22, 2015 | EPA | Compliance order (no penalty) | 2 violations (2 health-based): Long Term 2 Enhanced Surface Water Treatment Rule |
What the violations mean
CARBON, TOTAL
14 incidentsThe system did not complete a treatment step or action that federal rules require for CARBON, TOTAL (a treatment technique violation).
The utility had to notify customers about each of these violations.
Long Term 2 Enhanced Surface Water Treatment Rule
3 incidentsThe system failed required surface water treatment or filtration standards
Untreated or inadequately treated surface water can contain bacteria and viruses
Where the water comes from
Crow Agency Water System draws water from 3 surface water intakes.
Annual water quality report
Crow Agency Water System must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by EPA Region 8.
Certified drinking water labs by state EPA guidance for private wells