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Water system · PWSID CO0118045

PERRY PARK WSD

LARKSPUR, CO · ~3,890 people served

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

PWSID

CO0118045

State

Colorado

City

LARKSPUR

Population served

3,890

Primary source

GU

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

Lithium

28,000 ppt

limit —

No federal limit

Violations & enforcement

50

Violations on record

0

Unaddressed

0

Health-based

51

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Apr 2024. Official EPA record →

Monitoring & reporting · EPA contaminant 3014 began Nov 2023 Resolved
Monitoring & reporting · EPA contaminant 0800 began Feb 2023 Resolved
Monitoring & reporting · EPA contaminant 0200 began Dec 2022 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2022 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2022 Resolved
Monitoring & reporting · Uranium began Jan 2022 Resolved
Monitoring & reporting · EPA contaminant 0200 began Jun 2021 Resolved
Monitoring & reporting · EPA contaminant 0300 began Jun 2021 Resolved
Monitoring & reporting · EPA contaminant 0300 began Apr 2021 Resolved
Monitoring & reporting · EPA contaminant 0200 began Apr 2021 Resolved
Monitoring & reporting · Uranium began Apr 2020 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Apr 2020 Resolved

Recent enforcement actions

  • State action · SOX Apr 2024
  • State action · SIA Jan 2024
  • State action · SIE Jan 2024
  • State action · SOX Feb 2023
  • State action · SIA Feb 2023
  • State action · SIE Feb 2023
  • State action · SOX Feb 2023
  • State action · SIE Feb 2023

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

Arsenic

1 station · latest Nov 2022

0.204 · max 0.568 ug/L · 18

Fluoride

1 station · latest Nov 2022

1.88 · max 2.14 mg/L · 12

Manganese

1 station · latest Jul 2022

13.8 · max 69.4 ug/L · 6

Lead

1 station · latest Jun 2022

0.206 · max 0.316 ug/L · 2

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 CO0118045 — 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.