Is tap water safe in Quincy?

EPA SDWIS shows no active health-based violation in this profile's reporting window. That is not the same as proving every contaminant is absent, and federal data can lag state and utility records.

How hard is the water in Quincy, IL?

Nearby USGS observations produce an estimate of 206 ppm (12 grains per gallon), classified as very hard. This is not a tap measurement.

Do I need a water softener in ZIP code 62301?

At 206 ppm, a correctly sized whole-house softener can reduce scale buildup and hard-water spotting. Treatment for hardness does not remove all health-related contaminants.

City water profile

Quincy water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Quincy, Illinois.

Median indexed hardness

206PPM

2 indexed ZIPs

Range 206–206 PPM

State comparison: 79 PPM below
State hardness rank: #834 of 913
Matched utilities: 1
Active health records: 0

City summary

What the indexed records say

Quincy has 2 published ZIP profiles across Adams County. The indexed median is 206 PPM, compared with 285 PPM across Illinois.

Among the 913 Illinoiscities with an indexed median, Quincy ranks #834from highest to lowest. Across all 1,065 state ZIP profiles, available estimates run from 115to 408 PPM.

The 206–206 PPM range shows how much the available ZIP estimates vary within the city label.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs

Moderately hard0 ZIPs

Hard0 ZIPs

Very hard2 ZIPs

2 of 2 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance: 12.7 miles
Profiles with evidence: 2/2

Confidence labels

High: 0Moderate: 2Low: 0

Observation window: Jan 25, 2016 to Jun 2, 2026.

ZIP directory

Water reports in Quincy

Open a ZIP for site-level provenance and measurements.

ZIP code

62301

Very Hard

206 PPM

Nearest site: 10.4 mi
Confidence: Moderate

View full ZIP evidence →

ZIP code

62305

Very Hard

206 PPM

Nearest site: 12.7 mi
Confidence: Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Quincy

PWSID IL0010650

Surface water

System population served: 42,000
Last reported: May 27, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Compliance history

What EPA records show

No active health-based violation appears among the associated systems in the represented EPA reporting quarter. This does not mean every contaminant was tested at every tap.

Record	System	Period	Status
Consumer Confidence Rule	IL0010650	Jul 1, 2025	Unaddressed

Practical next steps

Move from index to evidence

1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
3. Test the tap when needed. Confirm health concerns or treatment sizing with the right method.

Continue comparing

Other Illinois communities

Camp Point

Adams County

296 PPM median

Clayton

Adams County

296 PPM median

Golden

Adams County

284 PPM median

La Prairie

Adams County

286 PPM median

Lima

Adams County

312 PPM median

Loraine

Adams County

284 PPM median

Search all 913 Illinois cities →

Questions people ask

About water in Quincy

Is the water hard?

The indexed city median is 206 PPM. Open the ZIP report to verify the distance and confidence behind that estimate.

Is the tap water safe?

Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.

Do I need treatment?

Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.