Thompson, MO Water Safety: 53/100 (2026)
1 ZIP code · 6 water systems · Updated 2026-06-03
Thompson, MO: water systems collectively below average — violations documented.
How Thompson Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Thompson Water
- Homes built before 1986: 54% — older plumbing may contain lead solder.
- Estimated remediation: $400 per household.
- CDC health risk index: 15.56 — above typical levels.
Who Supplies Your Water in Thompson
Federal drinking water records identify 6 systems in Thompson, MO. The leading 3 providers serve the largest share of residential connections, each operating as a separate entity with its own rate authority, infrastructure management, and EPA compliance obligations — so service conditions are not uniform city-wide.
Overview
We track water quality and home safety data for 1 ZIP code in Thompson, Missouri (population ~387), covering 6 community water systems serving approximately 48,191 people region-wide.
No EPA violations recorded across any ZIP codes in Thompson — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Thompson: D (53/100)
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
Thompson water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Thompson
- 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 |
|---|---|---|---|
| 65285 | D | CALLAWAY 2 WATER DISTRICT | 13,080 |
All ZIP Codes in Thompson
- 65285 [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.
Health Outcomes in Thompson
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
Housing & Infrastructure in Thompson
With 54% 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
Viewed through the lens of construction era, Thompson is predominantly an older city — a median build year of 1989 puts most of the residential inventory in the range where pre-1986 plumbing materials were the standard.
Over half of homes in Thompson 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.
Cost Context: What Remediation Means for Thompson Homeowners
How much of a Thompson home's value does documented remediation represent? A small fraction — the equity share here is in the low tier, and from a household financial perspective, most property owners are considering a commitment that fits comfortably within standard planning rather than a decision that rises to the level of a material budget event or significant equity consideration.
Remediation costs in Thompson are relatively low compared to home values. The $0–$800 estimated range is a small fraction of median property value. Home values are 8% below the Missouri average.
Lead Exposure Risk for Children in Thompson
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.
Practically, the structural drivers in Thompson — 54% pre-rule stock and citywide monitoring at or beyond the regulatory benchmark — make an in-home draw the practical way to translate aggregate averages into the specific conditions at one address.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
What You Can Do in Thompson
- 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 54% 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 Thompson, MO