DENISON WATER SUPPLY

DENISON, IA · ~9,381 people served

Check your exact address → DENISON overview

100

Excellent

PurityRadar safety score

PWSID

IA2424027

State

Iowa

City

DENISON

Population served

9,381

Primary source

Groundwater

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 100

2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.

PFAS & contaminant readings

Latest detections from EPA’s UCMR5 monitoring (through Jul 2025). Levels in parts per trillion (ppt).

Lithium

13,000 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Dec 2001. Official EPA record →

Monitoring & reporting · Nitrate began Oct 2000 Resolved

Monitoring & reporting · Lead & Copper Rule began Jul 1992 Resolved

Monitoring & reporting · Nitrate began Oct 1990 Resolved

Recent enforcement actions

State action · SIF Dec 2001
State action · SIF Dec 2001
State action · SOX Dec 2001
State action · SOX Dec 2001
State action · SFJ Nov 2001
State action · SIE Nov 2001
State action · SFJ Nov 2001
State action · SIE Nov 2001

This profile is built from EPA public records for system IA2424027 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.