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WaterSafeCheck

ZIP Code 80118 Water Quality Report

Larkspur, CO · Douglas County County

Safety Score
C

Water Safety Grade

Fair — Some compliance concerns

Health Violations

4

Total Violations

17

Lead Risk

Moderate

Contaminants

1

⚠

Active Water Quality Issues Detected

EPA records show 3 unresolved violations. Contact Perry Park Water Supply District for current status.

About Tap Water in ZIP Code 80118

Tap water in ZIP code 80118 (Larkspur, CO) receives a C grade (score: 60/100) based on EPA monitoring data. While the water from Perry Park Water Supply District is treated and regulated, this area has a moderate violation history that residents should be aware of.

Water System

Perry Park Water Supply District

EPA ID: CO0118045

Water Source

Surface Water

Population Served

3,890 residents

County

Douglas County County, Colorado

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Lead Levels in ZIP 80118

EPA action level: 15 ppb | Public health goal: 0 ppb

Lead Level: 1.0 ppb — Very Low

The 90th percentile lead level in 80118 is 1.0 ppb, well below the EPA action level of 15 ppb. While this is a reassuring result, the EPA's public health goal for lead is actually zero — no amount of lead is considered completely safe, particularly for children under 6 and pregnant women. Running your tap for 30 seconds before use and using a certified NSF/ANSI 53 filter adds an extra layer of protection.

Lead exposure risk in 80118 is rated Moderate. EPA models estimate a 23% probability of lead exposure risk in this ZIP code based on housing age, infrastructure age, and water system data. This may reflect a mix of older and newer housing stock and infrastructure. Families with young children should test their home's water and consider a certified NSF/ANSI 53 water filter.

Lead Level (90th percentile)
1.00 ppb (0.001 mg/L)
Lead Exposure Risk Rating
Moderate
Lead Exposure Probability

EPA model estimate based on housing age and infrastructure

23%
Note: Lead levels above are the 90th percentile from EPA monitoring — meaning 90% of samples were at or below this level. Even "undetected" tap water lead doesn't account for lead leaching from home plumbing. If your home was built before 1986, individual tap testing is recommended.
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Violation History

Past 5 years — EPA SDWIS data

Perry Park Water Supply District has recorded 4 health-based violations in the past 5 years. Multiple health violations suggest recurring compliance challenges. Residents should request a copy of the annual Consumer Confidence Report to understand what contaminants were involved and what corrective actions were taken. 3 violations are currently unresolved — meaning the issue has not yet been formally corrected in EPA records. This is a serious concern that residents should follow up on with their water utility.

Total Violations (5 yr)
17
Health-Based Violations
4
Unresolved Violations
3
Boil Water Advisories
0
Compliance Risk
Critical

Regulatory compliance risk is rated Critical — the highest risk category. Perry Park Water Supply District has an extensive history of unresolved violations and enforcement actions. Independent water testing is highly recommended.

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Contaminants Detected

Contaminants with health-based violations on record

EPA records identify 1 contaminant associated with health-based violations in ZIP code 80118: Gross Beta. These contaminants exceeded the Maximum Contaminant Levels (MCLs) established by the EPA under the Safe Drinking Water Act at some point in the 5-year monitoring period. The presence of these violations does not necessarily mean water is currently unsafe — water systems are often required to increase monitoring and treatment when violations occur. Review the annual Consumer Confidence Report for the most current status.

Gross Beta

⚖ Enforcement Actions

10 enforcement actions have been issued against Perry Park Water Supply District — a high number that reflects sustained compliance struggles. Enforcement actions escalate from administrative orders to financial penalties when utilities repeatedly fail to meet safe drinking water standards.
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Water Source & Environmental Factors

Surface Water

This system draws water from lakes, rivers, or reservoirs. Surface water is treated to remove sediment, microorganisms, and chemical contaminants before reaching taps.

Water Source Type
Surface Water
EPA Radon Zone

Highest potential

Zone 1
Energy Burden

% of household income spent on energy — indicator of older infrastructure

1.1%

EPA Radon Zone 1 — highest potential for radon in indoor air. Homeowners should test their home for radon and consider mitigation if levels exceed 4 pCi/L.

🛡 What Should You Do? — ZIP 80118 Recommendations

  • ⚠ Use a certified NSF/ANSI 53 filter for drinking and cooking water if you have young children
  • ⚠ Never give unfiltered tap water to infants in formula — use certified bottled or filtered water
  • ⚠ Request a copy of the Consumer Confidence Report to see what was detected and when
  • ⚠ Call the EPA Safe Drinking Water Hotline: 1-800-426-4791

Frequently Asked Questions — ZIP 80118 Water Quality

Is tap water safe to drink in ZIP code 80118?+
Tap water in 80118 (Larkspur, CO) is treated and regulated, but has a grade of C due to past violations. For most healthy adults, treated tap water is generally safe. Families with infants, young children, or immunocompromised individuals may want to use a certified water filter as a precaution.
What is the lead level in 80118 tap water?+
The 90th percentile lead level in 80118 is 1.0 ppb (parts per billion). The EPA action level is 15 ppb. This is a low level, well below the EPA action level of 15 ppb.
Who provides tap water to 80118?+
Tap water in ZIP code 80118 is provided by Perry Park Water Supply District (EPA ID: CO0118045). This system serves approximately 3,890 residents. You can contact them directly for Consumer Confidence Reports, current advisories, and billing information.
What is the water source for 80118?+
ZIP code 80118 is served by surface water. Surface water systems draw from rivers, lakes, or reservoirs and must meet strict EPA treatment requirements including filtration and disinfection.
Does 80118 have any active water quality violations?+
Yes — there are currently 3 unresolved violations on record for this water system. Unresolved violations indicate issues that have not yet been formally corrected in EPA tracking systems. Contact Perry Park Water Supply District for the latest update.
How do I get a copy of my water quality report for 80118?+
Your water utility — Perry Park Water Supply District — is required by law to send you an annual Consumer Confidence Report (CCR) by July 1 each year. You can also request it directly from the utility or find it online by searching "Perry Park Water Supply District Consumer Confidence Report." The EPA's ECHO database also has historical compliance data.
What water filter should I use in 80118?+
The right filter depends on what contaminants are present. For lead, look for a filter certified to NSF/ANSI Standard 53. For chlorine byproducts (like THMs), NSF/ANSI 42 filters work well. For a broad range of contaminants including PFAS, look for NSF/ANSI 58 (reverse osmosis) systems. For ZIP code 80118, with detected contaminants including Gross Beta, a multi-stage filter or reverse osmosis system is recommended.
Is 80118 tap water safe for babies and infants?+
Infants are especially vulnerable to lead, nitrates, and microbial contaminants in drinking water. Current EPA data for 80118 shows a lead level of 1.0 ppb — below the action level, but as an extra precaution, run your tap for 30 seconds before use and consider a certified lead filter for infant formula. Always consult your pediatrician for guidance specific to your child's health.

Data Sources & Methodology

Water quality data for ZIP code 80118 is compiled from the EPA Safe Drinking Water Information System (SDWIS), EPA ECHO enforcement database, UCMR5 unregulated contaminant monitoring, and Consumer Confidence Reports filed by Perry Park Water Supply District. Safety scores are composite metrics derived from violation history, lead levels, enforcement actions, and infrastructure risk indicators. Data reflects a 5-year monitoring window. Last dataset update: 2024. View EPA source data →