JOLIET
PWSID: IL1970450 · IL · Serves 160,000 people
According to EPA Safe Drinking Water Information System (SDWIS), JOLIET (PWSID IL1970450) in IL is listed as a CWS water system covering about 160,000 people. The same extract lists 2 health-based violation records spanning 1993-2024. Those 2 health-based rows for JOLIET cover contaminants such as LEAD AND COPPER RULE REVISIONS, Lead and Copper Rule; they remain historical EPA registry entries, not a current compliance or drinkability score.
JOLIET has 2 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. 2 distinct EPA contaminant codes appear in this system's record, including LEAD AND COPPER RULE REVISIONS, Lead and Copper Rule. Recorded violations span 1993–2024. 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)
- IL1970450
- System Type
- CWS
- Water Source
- Groundwater
- Location
- IL
- Population Served
- 160,000
- Health Violations
- Yes (2)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| LEAD AND COPPER RULE REVISIONS | 1 | 1 |
| Lead and Copper Rule | 1 | 1 |
Violation History (2)
| Contaminant | Health | Date |
|---|---|---|
| LEAD AND COPPER RULE REVISIONS | Yes | Oct 17, 2024 |
| Lead and Copper Rule | Yes | Jan 12, 1993 |
Frequently Asked Questions
What does EPA SDWIS list for JOLIET?
How many people does JOLIET serve?
What violations does JOLIET have?
What contaminants have been found in JOLIET water?
Compare beyond Illinois
Nationwide peers by violations & population served
Cross-state SDWIS systems nearest JOLIET on cumulative violation count (2) and EPA-reported population served (160,000). Violation-count peers include SAINT REGIS MOHAWK TRIBE, REDBY/RED LAKE, Kickapoo Traditional Tribe. Population peers include BAKERSFIELD, CITY OF, ALEXANDRIA, CITY OF, CITY OF KILLEEN.
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).
Explore More
About This Data
JOLIET (IL1970450) is drawn from EPA SDWIS. Health-based rows in this extract are MCL and Treatment Technique records spanning 1993-2024 covering LEAD AND COPPER RULE REVISIONS, Lead and Copper Rule. Historical registry entries, 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.