Maryland Heights, MO Water Safety: 50/100 (2026)
1 ZIP code · 2 water systems · Updated 2026-06-03
Across water systems in Maryland Heights, EPA data shows a below-average compliance pattern for MO — health-based violations are on file in several areas, and checking the specific system serving your address is a practical first step for concerned residents.
How Maryland Heights Compares
Data: EPA SDWIS Last verified: 2026-06-03
Maryland Heights Water: The Quick Version
- Homes built before 1986: 81% — older plumbing may contain lead solder.
- Estimated remediation: $2,700 per household.
- CDC health risk index: 12.49 — above typical levels.
Water Systems Serving Maryland Heights
Maryland Heights, MO draws its residential water from 2 separate providers among the 2 federally tracked systems. Each operates independently, with its own infrastructure, rate structure, and compliance record.
Overview
We track water quality and home safety data for 1 ZIP code in Maryland Heights, Missouri (population ~21,651), covering 2 community water systems serving approximately 1,111,120 people region-wide.
No EPA violations recorded across any ZIP codes in Maryland Heights — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Maryland Heights: D (50/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Maryland Heights water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Maryland Heights
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 2 (Moderate Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 63043 | D | Mo American St Louis St Charles Counties | 1,111,000 |
All ZIP Codes in Maryland Heights
- 63043 [D]
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.
CDC Health Data for Maryland Heights
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
How Old Is Maryland Heights's Housing Stock?
With 81% of homes built before 1986, lead solder in plumbing is a potential concern. The EPA banned lead solder in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
What does a median build year of 1978 mean for water safety in Maryland Heights? It means the majority of the city's residential plumbing was installed before 1986, when lead solder was federally banned, and a large share may predate 1970, when lead pipes were commonly used — making plumbing age a central variable in household-level lead risk across much of the city.
Over half of homes in Maryland Heights were built before 1986, when lead solder was banned. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.
Source: U.S. Census Bureau ACS B25034.
Maryland Heights: Remediation Cost in Perspective
Although the Maryland Heights remediation share is moderate, it remains reachable for most homeowners who plan for the expense in advance.
Remediation costs are moderate relative to home values in Maryland Heights. The estimated $1,500–$4,100 range is manageable for most homeowners but still worth budgeting for. Home values are 23% above the Missouri average.
Protecting Children from Lead in Maryland Heights
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
Before the federal solder ban, lead solder was a routine plumbing material, and 81% of the Maryland Heights inventory was built in that earlier era — a share large enough to move household-level reads onto the standard list.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Climate-Related Water Risk for Maryland Heights
Multiple flood events have been recorded for Maryland Heights through the NFIP — 104 claims in total, with 100% of ZIP codes in FEMA-designated zones — pointing to a flood exposure profile that merits inclusion in a water quality assessment without reaching high-severity planning territory.
Maryland Heights has a moderate flood history with 104 FEMA claims averaging $26,406 per payout. 100% of ZIP codes fall within FEMA flood zones. Flood events can contaminate drinking water and overwhelm treatment systems.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. Flood damage can add significantly to the estimated <strong>$2,700</strong> remediation cost per household.
Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
What You Can Do in Maryland Heights
- Test your water at home. City-level data shows averages — your tap may differ. NSF-certified test kits cost $20-40 and give results in days.
- Install a certified water filter. An NSF-certified pitcher or under-sink filter removes most common contaminants.
- Check your home's plumbing. With 81% of homes built before 1986, lead solder is a real possibility.
- Review your water system's CCR. Your utility publishes an annual Consumer Confidence Report with detailed test results. Request it or find it online.
Deep Dive Reports
Detailed analysis for Maryland Heights, MO