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Water system · PWSID CO0103005

AURORA CITY OF

AURORA, CO · ~533,407 people served

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

PWSID

CO0103005

State

Colorado

City

AURORA

Population served

533,407

Primary source

Surface water

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 Oct 2023). Levels in parts per trillion (ppt).

Lithium

20,000 ppt

limit —

No federal limit

PFBA

7.8 ppt

limit —

No federal limit

PFPeA

7.2 ppt

limit —

No federal limit

PFHxA

5.6 ppt

limit —

No federal limit

PFBS

3.3 ppt

limit —

No federal limit

Violations & enforcement

6

Violations on record

0

Unaddressed

1

Health-based

13

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jun 2017. Official EPA record →

Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2016 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2016 Resolved
Monitoring & reporting · EPA contaminant 0300 began May 2011 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jan 2011 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Apr 2002 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Apr 2002 Resolved

Recent enforcement actions

  • State action · SIF Jun 2017
  • State action · SIE May 2016
  • State action · SIA May 2016
  • State action · SOX Apr 2016
  • State action · SOX Dec 2011
  • State action · SOX Nov 2011
  • State action · SOX Jul 2011
  • State action · SIE Jul 2011

Area water-quality monitoring

Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.

ContaminantMedian · max · samples

Nitrate

1 station · latest Jan 2024

8.55 · max 12 mg/L · 88

Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.

This profile is built from EPA public records for system CO0103005 — 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.