Water system

Zion

Name: Zion drinking water quality
Creator: TapWaterZip
License: https://www.usa.gov/government-works

Illinois EPA ID IL0972000 24,442 people Surface water · purchased

What this means for you

Is it safe to drink right now?: Based on the latest EPA data, Zion has no unresolved health-based violations from the past year. Water that meets federal standards is generally considered safe to drink for most healthy people.
Should I use a filter?: Yes, we recommend considering one. Lead results are high enough that a certified lead-reduction filter is a sensible precaution.
What kind of filter?: For lead, choose NSF/ANSI 53 certified for lead reduction (or RO under 58). See matched standards and product picks.

This is general information from public EPA data, not medical advice. Lead often comes from a home’s own pipes, so only a test of your tap can tell your exposure. If you are pregnant, caring for an infant, or have a weakened immune system, ask your doctor or health department.

Summary: No health-based violations in the last 5 years; 3 monitoring/reporting violations; 1 not yet resolved; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile above the new 10 ppb action level (LCRI, effective Nov 1, 2027); Lead 90th percentile below the action level (2026).

EPA data snapshot 2026Q3. Grade is TapWaterZip's own score — see methods.

PFAS (“forever chemicals”), EPA UCMR 5

No PFAS detected in any UCMR 5 sample.

5 PFAS tested and not detected

HFPO-DA, PFOA, PFNA, PFHxS, PFOS (4 samples each, below EPA minimum reporting levels).

Hazard Index (PFHxS, PFNA, GenX, PFBS): 0 (limit 1.0, proposed for repeal).

Averages are per sampling location across UCMR 5 samples (non-detects counted as 0), approximating the rule’s running annual average. Not an official compliance determination; PFOA/PFOS MCL compliance begins April 26, 2029.

Lithium (also tested in UCMR 5, not a PFAS; no federal limit): highest location average 10.8 ppb.

Lead and copper

Lead 90th percentile11.2 ppb2026-06-30

Current action level15 ppbLCRI lowers to 10 ppb on Nov 1, 2027

Above the new 10 ppb lead action level under EPA’s Lead and Copper Rule Improvements (compliance date November 1, 2027). Today’s enforceable action level is still 15 ppb.

Violations (last 5 years)

Began	Type	Contaminant / rule	Status
2025-07-01	Other paperwork/notice violation	Consumer Confidence Rule	Unaddressed
2024-10-11	Other paperwork/notice violation	Public Notice	Resolved
2023-10-01	Missed or late testing/reporting	Lead and Copper Rule	Resolved

Filters matched to this water

FILTER PICKS

Look for filters certified (NSF, IAPMO or WQA) to these standards for the specific contaminant. Buttons open the maker’s page or an Amazon search; use “Check NSF listing” to verify a model’s claims. No affiliate links yet — grades are never sold.