MOUNT OLIVE
PWSID: IL1170700 · Aviston, IL · Serves 2,193 people
According to EPA Safe Drinking Water Information System (SDWIS), MOUNT OLIVE (PWSID IL1170700) in Aviston, IL is listed as a CWS water system covering about 2,193 people. The same extract lists 3 health-based violation records spanning 2025-2025. Those 3 health-based rows for MOUNT OLIVE cover contaminants such as Interim Enhanced Surface Water Treatment Rule; they remain historical EPA registry entries, not a current compliance or drinkability score.
MOUNT OLIVE has 3 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 Interim Enhanced Surface Water Treatment Rule. Recorded violations span 2025–2025. Day-to-day primacy enforcement for this system runs through the Illinois 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 Illinois state drinking-water program's public portal.
System Details
- EPA ID (PWSID)
- IL1170700
- System Type
- CWS
- Water Source
- Surface Water
- Location
- Aviston, IL
- Population Served
- 2,193
- Health Violations
- Yes (3)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| Interim Enhanced Surface Water Treatment Rule | 3 | 3 |
Violation History (3)
| Contaminant | Health | Date |
|---|---|---|
| Interim Enhanced Surface Water Treatment Rule | Yes | Dec 1, 2025 |
| Interim Enhanced Surface Water Treatment Rule | Yes | Nov 1, 2025 |
| Interim Enhanced Surface Water Treatment Rule | Yes | Oct 1, 2025 |
Frequently Asked Questions
What does EPA SDWIS list for MOUNT OLIVE?
How many people does MOUNT OLIVE serve?
What violations does MOUNT OLIVE have?
What contaminants have been found in MOUNT OLIVE water?
Compare beyond Illinois
Nationwide peers by violations & population served
Cross-state SDWIS systems nearest MOUNT OLIVE on cumulative violation count (3) and EPA-reported population served (2,193). Violation-count peers include Mohegan Tribal Utility Authority, RED CLIFF NORTH, Tesuque Pueblo. Population peers include WERBLS, HARMONY GROVE WATER ASSOC, COTTONWOOD MUNICIPAL WATER VSF1.
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
MOUNT OLIVE (IL1170700) is drawn from EPA SDWIS. Nearby county systems in this extract include BREESE; NEW BADEN; TRITOWNSHIP WATER DISTRICT; CARLYLE. Health-based rows (3 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.