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Water system · PWSID IL0990800

OTTAWA

OTTAWA, IL · ~18,097 people served

Check your exact address → OTTAWA overview
100
Excellent
PurityRadar safety score

PWSID

IL0990800

State

Illinois

City

OTTAWA

Population served

18,097

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 Sep 2025). Levels in parts per trillion (ppt).

Lithium

13,100 ppt

limit —

No federal limit

Violations & enforcement

80

Violations on record

1

Unaddressed

18

Health-based

208

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jul 2025. Official EPA record →

Reporting · EPA contaminant 5200 began Jul 2025 Unaddressed
Max contaminant level (MCL) · Uranium health-based began Jul 2023 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2023 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2023 Resolved
Monitoring & reporting · Uranium began Oct 2022 Resolved
Monitoring & reporting · Uranium began Jul 2022 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2022 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2022 Resolved
Monitoring & reporting · EPA contaminant 2992 began Jan 2020 Resolved
Monitoring & reporting · EPA contaminant 2955 began Jan 2020 Resolved
Monitoring & reporting · EPA contaminant 2982 began Jan 2020 Resolved
Monitoring & reporting · EPA contaminant 2380 began Jan 2020 Resolved

Recent enforcement actions

  • State action · SIE Jul 2025
  • State action · SIA Jul 2025
  • State action · SOX Oct 2024
  • State action · SFL May 2024
  • State action · SIF May 2024
  • State action · SFJ Mar 2024
  • State action · SIA Jan 2024
  • State action · SIE Jan 2024

This profile is built from EPA public records for system IL0990800 — 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.