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. Tolleson's average indicator is 22/100.

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. Tolleson has 20 recorded incidents in the NTSB database.

Infrastructure Risk Distribution

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

Low 0 ZIPs

Moderate 1 ZIP

High 0 ZIPs

Very High 0 ZIPs

Infrastructure Risk Overview

Tolleson, Arizona has a moderate modeled infrastructure stress level with an average heuristic indicator of 22/100. The result summarizes model inputs and does not predict service outcomes.

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	22/100
Modeled stress level	moderate
Water systems	3
Median build year	2005
Pre-1986 housing	14%
CO/gas incidents	20
ZIP codes	1
Population	44,995

Infrastructure Risk Distribution

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

Water System Age and Pipe Materials

The median home in Tolleson was built in 2005 (approximately 21 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:

Carbon Monoxide & Gas Safety

20 CO/gas incidents have been recorded in the county covering Tolleson. The average CO risk score is 11 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)

Tolleson vs. Nearby Arizona Cities

How Tolleson's infrastructure compares to nearby cities:

ZIP Codes in Tolleson

Tolleson covers 1 ZIP code served by 3 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 Tolleson

Tolleson 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
85353	C	55/100	12	View report →