Data: EPA ECHO, Census ACS, NTSB Last verified:

What is the infrastructure stress indicator?

The infrastructure stress indicator is a heuristic 0-100 composite of housing age, state funding need, violation history, and lead evidence. It is not a probability, measured pipe condition, or forecast of breaks, pressure loss, or contamination. Saint Helena's average indicator is 54/100.

What are CO/gas incidents?

Carbon monoxide (CO) and gas incidents tracked by the NTSB include pipeline failures, gas leaks, and CO exposure events. CO is odorless and can be fatal - the CDC reports about 420 deaths annually from unintentional CO poisoning. Every home should have working CO detectors on each floor, tested monthly. Saint Helena has 4 recorded incidents in the NTSB database.

Infrastructure Risk Distribution

Saint Helena is covered by a single ZIP code. Its infrastructure risk level:

Low 0 ZIPs

Moderate 0 ZIPs

High 1 ZIP

Very High 0 ZIPs

Infrastructure Risk Overview

Saint Helena, California has a high modeled infrastructure stress level with an average heuristic indicator of 54/100. The result does not establish that any pipe or system will fail.

The infrastructure stress indicator combines source inputs for housing age, funding need, violation history, and lead evidence. It does not measure the likelihood of pipe failure, water-main breaks, or system degradation.

Key Infrastructure Metrics

Metric	Value
Stress indicator	54/100
Modeled stress level	high
Water systems	5
Median build year	1962
Pre-1986 housing	75%
CO/gas incidents	4
ZIP codes	1
Population	7,646

Infrastructure Risk Distribution

How Saint Helena's 1 ZIP code is distributed by infrastructure risk level:

100% of Saint Helena's ZIP codes are in the high or very-high modeled stress category. This is a distribution of heuristic inputs, not a failure forecast.

Water System Age and Pipe Materials

The median home in Saint Helena was built in 1962 (approximately 64 years old). Housing age is one of the strongest proxies for water infrastructure age, as service lines and interior plumbing were typically installed during construction.

Pipe material risks by era:

With 75% of Saint Helena's homes built before 1986, a significant portion of residential plumbing may contain lead solder or aging pipe materials.

Carbon Monoxide & Gas Safety

4 CO/gas incidents have been recorded in the county covering Saint Helena. The average CO risk score is 3 out of 100.

Carbon monoxide is odorless and colorless - it is the leading cause of poisoning deaths in the U.S. Risk factors include:

• Gas furnaces, water heaters, and stoves
• Attached garages
• Blocked chimneys or vents
• Portable generators used indoors

Prevention:

• Install CO detectors on every level, especially near bedrooms
• Have gas appliances inspected annually
• Never run generators, grills, or cars in enclosed spaces
• Replace CO detectors every 5-7 years

What Homeowners Can Do

Pipe Inspection

• Hire a licensed plumber to inspect your service line and interior plumbing
• Check for discolored water (brown/orange = rust; white/cloudy = air or sediment)
• Test water pressure - low pressure may indicate buildup in aging pipes
• Look for visible corrosion on exposed pipes in basement or utility areas

Water Heater Maintenance

• Flush your water heater annually to remove sediment
• Check the anode rod every 2-3 years (prevents tank corrosion)
• Set temperature to 120F to prevent scalding and reduce energy use
• Replace water heaters older than 10-15 years proactively

CO Detector Placement

• One detector per floor, minimum
• Within 10 feet of each bedroom door
• Near attached garage and utility room
• 5 feet above the floor (CO rises with warm air) or on the ceiling
• Not near windows, doors, or HVAC vents (air movement causes false readings)

Saint Helena vs. Nearby California Cities

How Saint Helena's infrastructure compares to nearby cities:

ZIP Codes in Saint Helena

Saint Helena covers 1 ZIP code served by 5 water systems. Infrastructure condition varies by ZIP code based on housing age, pipe material, and water system maintenance. Check your specific ZIP code for localized data.

Data Sources

• Water systems: EPA ECHO - Enforcement and Compliance History Online
• Infrastructure risk: Derived model (housing age, violation history, system assessments)
• Housing age: U.S. Census Bureau American Community Survey (ACS)
• CO/gas incidents: NTSB, PHMSA pipeline incident reports

Source reporting periods vary. See each cited source for its publication schedule.

Infrastructure Risk by ZIP Code in Saint Helena

Saint Helena is covered by a single ZIP code, so one infrastructure profile applies citywide. Risk within it still depends on system age, pipe materials, and violation history.

ZIP Code	Grade	Score	Violations
94574	N/A	/100	9	View report →