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Official EPA SDWIS Verified ReportWater Quality & Testing GuideHistorical Record: No Recorded SDWIS Violations

ZIP Code 81128 Water Quality & Testing Report

Chromo, CO · Archuleta County County · Updated for 2026

Sahajul HaqueCompiled & verified by Sahajul Haque from official EPA SDWIS records
Public Health & Medical Notice: Drinking water quality data on this page reflects historical compliance records submitted under the Safe Drinking Water Act. This information does not constitute medical advice or a real-time safety guarantee. If you are pregnant, nursing, preparing infant formula, or immunocompromised, consult a healthcare provider. Boiling water kills biological pathogens, but does NOT remove chemical contaminants like lead, arsenic, or PFAS.
Quick EPA Verified Answer

Is Tap Water Safe to Drink in ZIP 81128 (Chromo, CO)?

Yes, tap water in ZIP code 81128 (Chromo, CO) is safe to drink under EPA Safe Drinking Water Act standards. Supplied by Crowley Ranch Reserve, the area earns an EPA Safety Grade of B (83/100) with 0 health violations, 0.3 ppb lead, and very hard (191 mg/L / 11.2 GPG) water.

Safety Score
B

Water Safety Grade

Good — Minor issues on record

Health Violations

0

Total Violations

0

Lead Risk

Moderate

Contaminants

0

About Tap Water in ZIP Code 81128

Tap water in ZIP code 81128 (Chromo, CO) is distributed by Crowley Ranch Reserve (EPA ID: CO0104393), serving approximately 49 residents. Based on EPA Safe Drinking Water Act compliance records, this system receives a water safety grade of B with a composite quality score of 83/100.

Water System

Crowley Ranch Reserve

EPA ID: CO0104393

Water Source

Surface Water

Population Served

49 residents

County

Archuleta County County, Colorado

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Lead Levels in ZIP 81128

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

Lead Level: 0.3 ppb — Very Low

The 90th percentile lead level in 81128 is 0.3 ppb. This meets the EPA action level of 15 ppb. Health experts recommend a target of 0 ppb for optimal safety.

Lead exposure risk in 81128 is rated Moderate. EPA models estimate a 32% exposure probability based on housing and infrastructure age.

Lead Level (90th percentile)
0.30 ppb (0.0003 mg/L)
Copper Level (90th percentile)

EPA action level: 1.3 mg/L

1.67 mg/L
Lead Exposure Risk Rating
Moderate
Lead Exposure Probability

EPA model estimate based on housing age and infrastructure

32%
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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Water Hardness & Mineral Content

Grains per gallon (GPG) & Parts per million (PPM / mg/L)

Classification: Very Hard11.2 GPG · 191 mg/L

Water in ZIP 81128 is Very Hard (191 mg/L / 11.2 GPG). High concentrations of dissolved limestone minerals cause severe mineral buildup, stiff laundry, dry skin, and premature water heater wear.

Recommendation: A whole-home water softener system is strongly recommended to protect plumbing and home appliances.
Hardness (GPG)

Grains per gallon

11.2 GPG
Hardness (PPM / mg/L)

Parts per million CaCO3

191 mg/L
Appliance Scaling Risk
High / Severe

Interactive Water Safety & Filter Matcher

Personalized for ZIP 81128 (Chromo, CO)

Free Tool

Official EPA SDWIS Database Entry

Utility: Crowley Ranch Reserve · PWSID: CO0104393

Verify on EPA.gov
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Violation History

Past 5 years — EPA SDWIS data

Crowley Ranch Reserve has recorded zero violations in the EPA compliance database over the past 5 years.

Total Violations (5 yr)
0
Health-Based Violations
0
Unresolved Violations
0
Boil Water Advisories
0
Compliance Risk
Low

Regulatory compliance risk for this utility is rated Low based on past reporting and enforcement records.

⚗️

Contaminants Detected

Contaminants with health-based violations on record

No health-based contaminant violations are on record for ZIP code 81128 under the Safe Drinking Water Act.

⚖ Enforcement Actions

EPA or state regulators have issued 1 enforcement action to address compliance lapses.
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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

Moderate potential

Zone 2

EPA Radon Zone 2 — moderate radon potential. The EPA recommends testing your home regardless of zone designation.

Water Quality Testing in ZIP 81128

Tap Water & Well Testing Recommendations

Residents in ZIP code 81128 served by Crowley Ranch Reserve can test tap water or private well systems to verify water purity. Testing detects hidden contaminants before they impact family health.

Tap Water Testing Steps

  • 1.Conduct a certified lead check if your home was constructed before 1986.
  • 2.Use certified lab testing kits rather than uncalibrated test strips for regulated compliance.
  • 3.Sample water from both your kitchen faucet and water heater to compare line purity.

Private Well Testing Steps

  • •Test for Coliform bacteria and Nitrates annually.
  • •Test for heavy metals, radon, and PFAS every 3 years.
  • •Send samples to a state-certified drinking water laboratory recognized by Colorado Department of Public Health and Environment.
Certified Lab Testing: Always use an EPA-certified drinking water laboratory in CO for formal legal or real estate compliance testing.

🛡 What Should You Do? — ZIP 81128 Recommendations

  • ✓ Run cold water for 30 seconds each morning before use — especially if pipes are old
  • ✓ Request your annual Consumer Confidence Report from Crowley Ranch Reserve
  • ✓ If your home was built before 1986, consider testing your own tap for lead
  • ✓ Use a pitcher filter (NSF/ANSI 42 certified) for improved taste

Recommended Taste & Safety Filter:

🚰

NSF/ANSI 53 Certified Pitcher Filter

Best for removing aesthetic chlorine, odors, and low-level heavy metals.

Filter Selection Guide →

Frequently Asked Questions — ZIP 81128 Water Quality

Is tap water safe to drink in ZIP code 81128?+
Yes — tap water in 81128 (Chromo, CO) meets EPA standards with a water safety grade of B. No health-based violations are on record in the past 5 years.
How do I get my water tested in ZIP 81128 (Chromo, CO)?+
To test water quality in ZIP 81128, you can order a certified drinking water test kit or send water samples to an EPA/NELAP certified laboratory in CO. Certified testing checks for lead, coliform bacteria, nitrates, hardness, and PFAS that standard test strips miss. Contact Colorado Department of Public Health and Environment for a list of certified regional labs.
How hard is the tap water in 81128?+
Tap water in 81128 is classified as Very Hard with an estimated mineral hardness of 191 mg/L (11.2 GPG). A whole-home water softener system is strongly recommended to protect plumbing and home appliances.
Should I test private well water in 81128?+
Yes. Unlike municipal systems, private wells in 81128 are not regulated by the EPA or local utilities. Private well owners should test their water annually for coliform bacteria and nitrates, and every 3 to 5 years for heavy metals (lead, arsenic) and volatile organic compounds.
What is the lead level in 81128 tap water?+
The 90th percentile lead level in 81128 is 0.3 ppb. The EPA action level is 15 ppb. This is below the EPA action level.
Is there an active boil water notice in 81128?+
There are currently no active boil water advisories on record for 81128. Water treatment systems are operating within normal parameters.
Who provides tap water to 81128?+
Tap water in ZIP code 81128 is provided by Crowley Ranch Reserve (EPA ID: CO0104393), serving approximately 49 residents.
What water filter should I use in 81128?+
Based on water metrics for 81128, we recommend None / Standard Pitcher. Look for certifications such as NSF/ANSI 42 (Chlorine, Taste & Odor).

Data Sources & Methodology

Water quality data for ZIP code 81128 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 Crowley Ranch Reserve. 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 →