CHINOOK CITY OF
PWSID: MT0000174 · Chinook, MT · Serves 1,300 people
According to EPA Safe Drinking Water Information System (SDWIS), CHINOOK CITY OF (PWSID MT0000174) in Chinook, MT is listed as a CWS water system covering about 1,300 people. The same extract lists 11 health-based violation records spanning 2025-2025. Those 11 health-based rows for CHINOOK CITY OF cover contaminants such as Total Haloacetic Acids (HAA5); they remain historical EPA registry entries, not a current compliance or drinkability score.
CHINOOK CITY OF has 11 health-based violation records in this historical extract. Monitoring and reporting records are not included.
PlainEnviro's health-based SDWIS extract covers monitoring and reporting violations only -- it does not include unresolved enforcement actions in progress or corrective steps a utility has taken since the extract date. 1 distinct EPA contaminant code appears in this system's record, including Total Haloacetic Acids (HAA5). Recorded violations span 2025–2025. Day-to-day primacy enforcement for this system runs through the Montana drinking-water program, not EPA directly.
A historical health-based record does not necessarily describe current water quality or compliance. The most authoritative current source is the utility's annual Consumer Confidence Report. For enforcement history and corrective-action orders, consult EPA ECHO and the Montana state drinking-water program's public portal.
System Details
- EPA ID (PWSID)
- MT0000174
- System Type
- CWS
- Water Source
- Surface Water
- Location
- Chinook, MT
- Population Served
- 1,300
- Health Violations
- Yes (11)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| Total Haloacetic Acids (HAA5) | 11 | 11 |
Violation History (11)
| Contaminant | Health | Date |
|---|---|---|
| Total Haloacetic Acids (HAA5) | Yes | Oct 1, 2025 |
| Total Haloacetic Acids (HAA5) | Yes | Oct 1, 2025 |
| Total Haloacetic Acids (HAA5) | Yes | Jul 1, 2025 |
| Total Haloacetic Acids (HAA5) | Yes | Jul 1, 2025 |
| Total Haloacetic Acids (HAA5) | Yes | Jul 1, 2025 |
| Total Haloacetic Acids (HAA5) | Yes | Apr 1, 2025 |
| Total Haloacetic Acids (HAA5) | Yes | Apr 1, 2025 |
| Total Haloacetic Acids (HAA5) | Yes | Apr 1, 2025 |
| Total Haloacetic Acids (HAA5) | Yes | Apr 1, 2025 |
| Total Haloacetic Acids (HAA5) | Yes | Jan 1, 2025 |
| Total Haloacetic Acids (HAA5) | Yes | Jan 1, 2025 |
Frequently Asked Questions
What does EPA SDWIS list for CHINOOK CITY OF?
How many people does CHINOOK CITY OF serve?
What violations does CHINOOK CITY OF have?
What contaminants have been found in CHINOOK CITY OF water?
Compare beyond Montana
Nationwide peers by violations & population served
Cross-state SDWIS systems nearest CHINOOK CITY OF on cumulative violation count (11) and EPA-reported population served (1,300). Violation-count peers include MICCOSUKEE TRIBE OF INDIANS, Arizona Village, WHITE SWAN. Population peers include MAKAH NEAH BAY, OPPELO WATER DEPARTMENT, KATHERINE LANDING DWTP.
Similar violation count
Nearest cross-state community systems (500+ served) by SDWIS violations on record.
Similar population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ gate).
Nearby Water Systems
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About This Data
CHINOOK CITY OF (MT0000174) is drawn from EPA SDWIS. Nearby county systems in this extract include HAVRE CITY OF; ROCKY BOY'S RURAL WATER; HILL COUNTY WATER DISTRICTS; ROCKY BOY AGENCY WATER SYSTEM. Health-based rows (11 MCL/TT) are historical registry state, not a current drinkability score.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.