Is Romeoville, IL tap water safe?
Supplied by Romeoville Water System · serves 50,458 people (16,743 connections) · Groundwater · EPA ID IL1970900
Data: U.S. EPA · How we read the data · How we check it
Most of Romeoville gets its water from Romeoville Water System. Parts of the city are served by a smaller system: Corinth Public Water District (3,927 people). Your water bill names your system.
Summary
No federal limits exceeded in EPA data.
- PFAS
- Detected, below limit3 of 29 PFAS found at least once. All averages below the federal limits.
- Lithium
- Above screening levelHighest result 54.6 ppb. EPA uses 10 ppb to decide what to study further. It is not a health limit, and there is no federal limit for lithium. About 1 in 4 systems tested were above it.
- Lead
- Below action level8.22 ppb (parts per billion) at the 90th percentile: 9 in 10 homes sampled were at or below it. Action level 15 ppb, falling to 10 ppb in Nov 2027. Monitoring period ending Dec 2025. Your home's pipes can make yours higher.
- Violations
- None health-basedNo health-based violations since 2016.
- Built before 1986, or not sure what your service line is made of? Check your service line and test your tap. Utility data can't show your pipes.
- Tested your own tap? Compare your result with these numbers. Moving? Compare this system with another.
- Read Romeoville Water System's annual water quality report (Consumer Confidence Report). It lists every regulated contaminant tested and is usually on the utility's website or mailed with your bill, and you can also request it at (815) 886-1870. EPA: how to find it.
PFAS (“forever chemicals”)
EPA UCMR 5: 8 entry points tested Jun 2024 to Jun 2025. "Average" is the highest entry-point average (non-detects counted as zero), the way EPA compares UCMR 5 results to the limits. ppt = parts per trillion. These results do not determine compliance.
| Contaminant | Highest average |
|---|---|
| PFOA Not detected Limit 4 ppt | – |
| PFOS Not detected Limit 4 ppt | – |
| PFHxS Not detected Limit 10 ppt | – |
| PFNA Not detected Limit 10 ppt | – |
| HFPO-DA (GenX) Not detected Limit 10 ppt | – |
| Hazard Index (a combined score for PFHxS, PFNA, GenX and PFBS, where above 1 is over the limit) Not detected Limit 1 | – |
| PFBS Not detected Guideline 2,000 ppt | – |
| PFBA Detected, below limit Guideline 6,000 ppt | 6.4 ppt |
| PFHxA Detected, below limit Guideline 3,000 ppt | 9.2 ppt |
| PFPeA Detected, no limit | 16.5 ppt |
29 PFAS tested, 3 detected at least once. "Not detected" means below EPA's reporting limit (about 2 to 20 ppt depending on the chemical), not proven zero. PFAS not listed were not detected. The limits for PFHxS, PFNA, GenX and the Hazard Index were proposed for rescission in May 2026. That proposal is not final. Systems have until 2029 to meet the limits.
Lithium
Detected in 15 of 15 samples. Highest result 54.6 ppb. EPA's non-enforceable screening level is 10 ppb. Above screening level The screening level is how EPA decides what to study further, not a health limit. There is no federal limit for lithium and no filter is certified to remove it. About lithium.
Lead and copper
Latest 90th percentile: 8.22 ppb lead (Jan 2025 – Dec 2025). Below action level
| Monitoring period | Lead (90th pct.) |
|---|---|
| Jan 2025 – Dec 2025 | 8.22 ppb |
| Jan 2022 – Dec 2024 | 1.44 ppb |
| Jan 2019 – Dec 2021 | 2.32 ppb |
Earlier results (9)
| Jan 2018 – Jun 2018 | 3.25 ppb |
| Jul 2017 – Dec 2017 | 4.01 ppb |
| Jan 2017 – Jun 2017 | 0 ppb |
| Jan 2013 – Dec 2015 | 7.75 ppb |
| Jan 2010 – Dec 2012 | 0 ppb |
| Jan 2009 – Dec 2011 | 0 ppb |
| Jan 2008 – Dec 2008 | 0 ppb |
| Jan 2007 – Dec 2007 | 0 ppb |
| Jul 2006 – Dec 2006 | 0 ppb |
Lead comes from pipes and fixtures, not the source water, so it varies home to home. The 90th percentile means 9 in 10 sampled homes were at or below it. More on lead.
Violations
Health-based violations mean a contaminant exceeded a limit or a required treatment step was missed. Monitoring and reporting violations mean required tests or reports were late or missing, so the water's quality during that time is unknown. The total includes every violation in EPA's records, most of them paperwork.
Earlier EPA testing (2013–2020)
| Contaminant | Highest | Guideline |
|---|---|---|
| Manganese | 21.1 ppb | 300 ppb |
| Strontium | 0.65 ppm | 1.5 ppm |
| Chromium-6 | 0.2 ppb | – |
| Molybdenum | 5.2 ppb | 40 ppb |
| Cobalt | 1.2 ppb | 70 ppb |
Where it serves
Romeoville
ZIP codes the system reported serving: 60440, 60446, 60544
Nearby utilities
- Crest Hill Water System Crest Hill · 4 mi · PFAS above limit
- Illinois American Water – West Suburban Bolingbrook · 4 mi
- Plainfield Water System Plainfield · 7 mi
- Joliet Water System Joliet · 8 mi
- Naperville Water System Naperville · 9 mi
- Orland Park Water System Orland Park · 13 mi
Questions
Is Romeoville tap water safe to drink?
Most of Romeoville gets its water from Romeoville Water System. Romeoville Water System has no health-based violations since 2016. EPA testing found no PFAS above the federal limits. Federal data can't tell you about your own pipes: lead comes from service lines and plumbing, so test your tap if your home was built before 1986. For the official word, read the utility's annual Consumer Confidence Report.
Does Romeoville water have PFAS?
Yes. EPA's 2023–2025 testing of Romeoville Water System found 3 PFAS at least once. None of the averages were above the federal limits.
What is the lead level in Romeoville water?
The most recent 90th-percentile lead result for Romeoville Water System is 8.22 ppb, for the period ending Dec 2025. The federal action level is 15 ppb, falling to 10 ppb in November 2027. The 90th percentile means 9 in 10 homes sampled were at or below this number. Individual homes can be higher.
Check these numbers yourself
Every figure on this page comes from public EPA records. You don't have to take our word for it:
- EPA's own report for IL1970900: violations, enforcement and inspections, straight from EPA.
- EPA UCMR 5 data: the PFAS and lithium results (search the file for PWSID IL1970900).
- EPA SDWIS download: the lead results, population and violation records we use.
- The utility's annual water quality report (Consumer Confidence Report): ask Romeoville Water System at (815) 886-1870, or see EPA's guide to finding it.
Found something that doesn't match? Tell us and we'll check it against EPA's records. How we check our data.
Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.