Colchester
IL

Is Colchester, IL Tap Water Safe to Drink?

Colchester tap water meets federal Safe Drinking Water Act standards but 1 of 1 ZIP code show detections above EPA health guidelines, primarily for lithium. A certified filter is recommended for households that want an additional layer of protection.

3Water systems
1ZIP codes
100%ZIPs above EPA guideline
Metro areaMacomb, IL
Latest data2024-12-09

Where Does Colchester Get Its Water?

Water in Colchester, IL is provided by 3 public water systems: DALLAS RURAL WATER DISTRICT, CLARK COUNTY CONS PWSD 1 and MACOMB.

How Is Colchester Tap Water Treated?

Treated water is disinfected using calcium hypochlorite and chloramines. Treatment includes conventional treatment (coagulation, flocculation, and filtration), groundwater disinfection, membrane filtration, post-ozone biofiltration and slow sand filtration.

What's in Colchester Tap Water?

The following contaminants were detected most frequently in Colchester public water systems. 1 of 1 ZIP codes showed detections above EPA health guidelines.

ContaminantPeak detectedEPA guidelineZIPs detectedStatus
lithium 37.1 µg/L 10 µg/L 1 ZIP Above guideline
PFTrDA 0.007 µg/L — 0 ZIPs Within guideline
8:2 FTS 0.005 µg/L — 0 ZIPs Within guideline
HFPO-DA 0.005 µg/L — 0 ZIPs Within guideline
PFBA 0.005 µg/L — 0 ZIPs Within guideline

Health Risk Profile for Colchester

Based on EPA monitoring data, 1 of 1 ZIP codes in Colchester have recorded detections above EPA health guidelines. Sensitive populations such as infants, pregnant individuals, and those with weakened immune systems may benefit from an additional layer of protection such as a certified point-of-use filter.

Best Filters for PFAS Water Profile

PFAS compounds are detected in this water supply. A reverse osmosis (RO) system or an activated-carbon filter specifically certified under NSF/ANSI P473 is required for reliable PFAS reduction. Standard pitcher and faucet filters without P473 certification do not remove PFAS.

Waterdrop G3P600 Reverse Osmosis System
Under-sink RO system

8-stage tankless RO system certified to NSF/ANSI 58, reduces 1,000+ contaminants including PFAS, lead, arsenic, fluoride, and nitrates.

Epic Pure XP Water Filter Pitcher
Pitcher filter

NSF-certified dual-layer filtration reduces 70+ contaminants including PFAS, lead, chlorine, microplastics, and bacteria.

See recommendations matched to your exact address: choose your ZIP code below.

Frequently Asked Questions about Colchester Tap Water

Is Colchester tap water safe to drink?

Colchester tap water meets Safe Drinking Water Act requirements but 1 of 1 ZIP codes show contaminant levels above EPA health-based guidelines. A certified point-of-use filter adds an extra layer of protection.

What contaminants are in Colchester tap water?

The most commonly detected contaminants in Colchester water systems include: lithium, PFTrDA, 8:2 FTS. See the ZIP-level reports for exact measurements and EPA guideline comparisons.

Where does Colchester get its drinking water?

Colchester receives water from 3 public water systems, including DALLAS RURAL WATER DISTRICT.

Do I need a water filter in Colchester?

If your ZIP code is among those with detections above EPA health guidelines, choose a filter certified for the specific contaminants shown in your ZIP report. Reverse osmosis is generally the broadest option for PFAS, lithium, and many other dissolved contaminants.

How often is Colchester tap water tested?

Public water systems in Colchester are required by the EPA to test for regulated contaminants on schedules ranging from daily (for microbials and disinfectants) to annual or triennial (for many chemical contaminants). Results are published in annual Consumer Confidence Reports (CCRs). The data on this page reflects the most recent available EPA monitoring results, with the latest sample date of 2024-12-09.

Tap water reports by ZIP in Colchester

Water utilities serving Colchester, IL

Service area boundaries are approximate and based on state filings or modeled estimates. Contact your utility to confirm exact service at a specific address.

Modeled boundaries are shown with a dashed outline. Outlines appear when service-area boundary data is available for this ZIP.

Also covers / overlaps with