TapSafetyReport
C47/100

Larkspur Tap Water Quality: Is It Safe to Drink? (2026 Report)

Serving 3,890 residents · Colorado

What's In Larkspur's Tap Water?

31
Contaminants Tested
0
Exceed EPA Limits
1
Above EPA Goals
1 contaminant above EPA health goals
ContaminantDetectedLimit (MCL)Status
Lead (90th percentile)
0.001 mg/L0.015 mg/LAbove Goal

EPA Violation History

8

Violations (last 5yr)

0

Unresolved

0

Health-Related

TIER 3Resolved

Violation related to E. coli (RTCR)

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: November 1, 2023 – November 30, 2023Rule: Surface Water Treatment RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved

Violation related to Lead and Copper Rule

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: February 16, 2023 – February 27, 2023Rule: Surface Water Treatment RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved

Failed to complete routine monitoring

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: December 1, 2022 – December 31, 2022Rule: Surface Water Treatment RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved

Failed Level 2 Assessment under Revised Total Coliform Rule

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: January 1, 2022 – March 31, 2022Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: January 1, 2022 – March 31, 2022Enforcement: Resolving — corrective action underway
TIER 3Resolved

Failed Level 2 Assessment under Revised Total Coliform Rule

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: January 1, 2022 – March 31, 2022Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved

Failed to complete routine monitoring

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: June 1, 2021 – June 30, 2021Rule: Surface Water Treatment RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved

Missed required monitoring deadline

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: June 1, 2021 – June 30, 2021Rule: Surface Water Treatment RuleEnforcement: Resolving — corrective action underway

Understanding violation severity

Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.

Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly

Water Utility Details

PERRY PARK WSD
Population Served

3,890

Water Source

Groundwater Under Influence of Surface Water

System ID

CO0118045

Frequently Asked Questions About Larkspur Water

Is Larkspur tap water safe to drink?

Larkspur, Colorado tap water receives a grade of C (47/100), which is considered fair. 0 contaminant(s) exceed EPA maximum contaminant levels and 50 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.

What contaminants are in Larkspur's water?

Of the 31 contaminants tested in Larkspur's water supply, the most notable include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.

Does Larkspur have any water quality violations?

Yes, Larkspur has 50 EPA violation(s) on record, with the most recent in 2023. Violation types include MR. None of these are classified as health-based violations.

Do I need a water filter in Larkspur?

Larkspur water meets EPA standards, so a filter is not strictly necessary. However, some residents prefer the added security of a water filter. EPA health goals (MCLGs) are stricter than legal limits and are set at levels with zero expected health risk. 1 contaminant(s) exceed these stricter goals.

Where does Larkspur's tap water come from?

Larkspur's drinking water is sourced from groundwater under influence of surface water and supplied by PERRY PARK WSD. The system serves approximately 3,890 people. Surface water sources include rivers, lakes, and reservoirs.

How often is Larkspur's water tested?

Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Larkspur's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.

How does Larkspur's water compare to other cities in Colorado?

Larkspur's water quality score of 47/100 earns a grade of C, which is considered fair. This is a below-average score that indicates room for improvement. Visit our Colorado state page to see how all cities in the state compare.

What should I do if I'm concerned about Larkspur's water quality?

If you have concerns about Larkspur's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (PERRY PARK WSD) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.

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