Drinking water quality · 2024
· Verified
What's in Ucmr5 — Aurora (2024), IL tap water
19 contaminants were measured in the Ucmr5 — Aurora (2024), IL water system's 2024 annual report. Each is shown below against its federal limit — 1 sit at or above that limit.
- Reporting year
- 2024
- Contaminants measured
- 19
- Over federal limit
- 1
- Approaching the limit
- 1
- Worst contaminant
- Combined Radium
- Service area
- IL
PFAS — EPA UCMR5 (2023–2025)
4 PFAS compounds detected in Ucmr5 — Aurora (2024), IL
The EPA finalized the first-ever federal drinking-water limits for six PFAS compounds in April 2024. These numbers come straight from EPA's UCMR5 lab dataset — every U.S. system serving more than 3,300 people tested every PFAS sample at an entry point to its distribution system. PFAS not listed below were either tested and not detected, or not yet sampled.
PFHxA
● Detected (no federal limit)PFBA
● Detected (no federal limit)PFBS
● Detected (no federal limit)PFPeA
● Detected (no federal limit)Where your water comes from · EPA SDWIS
Ucmr5 — Aurora (2024), IL's drinking water comes from ground water, drawn from 21 sources.
Source
- WELL 25
- INTAKE 00679-FOX RIVER INTAKE
- WELL 101
- WELL 115
- + 17 more
Treatment
- TP 04-WELL 16 (EMERGENCY)
- TP 06-WELL 18 (EMERGENCY)
- TP 09-WELL 22 (EMERGENCY)
- + 1 more
Distribution
Compliance history
Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.
- Maximum contaminant level exceededHealth-based4 violations on record · most recent Feb 2004resolved
- Treatment technique violationHealth-based1 violation on record · most recent Feb 1993resolved
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | 8.95 pCi/LReported levelSystem-wide | 0 pCi/LMCLG | At or above the limit |
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 3.89 pCi/LReported levelSystem-wide | 0 pCi/LMCLG | Within the limit |
| Gross Beta Particle ActivityGross beta particle activity — a combined measure of beta-emitting radioactive substances. | 3.2Reported levelSystem-wide | 0MCLG | Detected — no federal limit |
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 31.3–74.9 ug/LRangeSystem-wide | None set | Approaching the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 7.8–35.4 ug/LRangeSystem-wide | None set | Within the limit |
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChloramineA longer-lasting disinfectant made by combining chlorine with ammonia. | 3–3 mg/LRangeSystem-wide | 4 mg/LMRDLG | Within the limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 0.0109 mg/L90th percentileAt the tap | 0.015 mg/LAction level | Within the limit |
| CopperA metal that enters water from corroding household plumbing. | 0.0549 mg/L90th percentileAt the tap | 1.3 mg/LMCLG | Within the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 0.012 mg/LReported levelSystem-wide | 2 mg/LMCLG | Within the limit |
| LithiumA naturally occurring element found in some groundwater. | 12.3 ug/LAverageSystem-wide | None set | Detected — no federal limit |
| SodiumA naturally occurring salt component. | 55 mg/LReported levelSystem-wide | None set | Detected — no federal limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.72 mg/LReported levelSystem-wide | 4 mg/LMCLG | Within the limit |
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 1.3–1.3 mg/LRangeSystem-wide | 10 mg/LMCLG | Within the limit |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chromium | 1.1–2.1 ug/LRangeSystem-wide | None set | Within the limit |
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Cryptosporidium | 0.079AverageSource water | None set | Detected — no federal limit |
People also ask about Ucmr5 — Aurora (2024), IL's water
+Is Ucmr5 — Aurora (2024), IL tap water safe to drink in 2024?
The 2024 Consumer Confidence Report for the Ucmr5 — Aurora (2024), IL water utility lists 1 contaminant at or above the federal limit: Combined Radium. Whether that means the water is "unsafe" depends on which contaminant, how long the exposure, and individual health factors. The table on this page shows the measured value, the federal threshold, and the regulated statistic used for compliance.
+What contaminants are in Ucmr5 — Aurora (2024), IL tap water?
19 contaminants were measured in Ucmr5 — Aurora (2024), IL's 2024 Consumer Confidence Report, spanning metals, pfas ("forever chemicals"), and radionuclides. 9 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Which contaminants exceed federal limits in Ucmr5 — Aurora (2024), IL tap water?
One contaminant in Ucmr5 — Aurora (2024), IL's 2024 report sits at or above the federal limit: Combined Radium (1.8× the limit). The EPA enforces these limits against the regulated reporting statistic — typically a running annual average or 90th percentile — not a one-off sample spike.
+What is the worst contaminant in Ucmr5 — Aurora (2024), IL tap water?
The contaminant with the highest measured value relative to its federal limit in the 2024 report is Combined Radium, at 1.8× the federal threshold. It belongs to the radionuclides family of contaminants.
+Are any contaminants in Ucmr5 — Aurora (2024), IL tap water approaching the federal limit?
One contaminant is between 80% and 100% of the federal limit in this report: TTHM. Approaching means measured but not in violation — a margin that can close quickly if conditions change.
+Where does the data on this page come from?
Every value is transcribed from Ucmr5 — Aurora (2024), IL's 2024 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is Ucmr5 — Aurora (2024), IL's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2024 report; a new report will replace it once the utility publishes its next annual update.