Terreton, ID Water Safety: 63/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-03
The systems supplying Terreton vary in performance across ID benchmarks — most meet minimum federal standards, but documented violations in select areas are on record.
How Terreton Compares
Data: EPA SDWIS Last verified: 2026-06-03
Key Facts for Terreton Residents
- Homes built before 1986: 65% — older plumbing may contain lead solder.
- Estimated remediation: $2,200 per household.
- CDC health risk index: 11.31.
Terreton's Water Providers
Most residential addresses in Terreton, ID are served by a single water utility — the dominant system among the 1 provider tracked in federal data.
Overview
We track water quality and home safety data for 1 ZIP code in Terreton, Idaho, covering 1 community water system serving approximately 1,239 people.
No EPA violations recorded across any ZIP codes in Terreton — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Terreton: C (63/100)
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
Terreton water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Terreton
- 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 |
|---|---|---|---|
| 83450 | C | M AND T WATER AND SEWER DIST | 358 |
All ZIP Codes in Terreton
- 83450 [C]
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.
Terreton Community Health Snapshot
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
Terreton Infrastructure Age
With 65% 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, Terreton is predominantly an older city — a median build year of 1973 puts most of the residential inventory in the range where pre-1986 plumbing materials were the standard.
Over half of homes in Terreton 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.
How Remediation Costs Compare in Terreton
Homeowners in Terreton are working with a moderate equity share for documented remediation — the commitment deserves a line in the household budget, not dismissal.
Remediation costs are moderate relative to home values in Terreton. The estimated $1,200–$3,300 range is manageable for most homeowners but still worth budgeting for. Home values are 45% below the Idaho average.
Terreton: Lead Risk & Vulnerable Populations
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.
Pulling a tap sample fills the gap that utility data cannot close, particularly here where 65% of housing dates from the pre-rule era and citywide monitoring sits at or above the regulatory mark in Terreton.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Terreton: Flood History & Water Damage Risk
FEMA data shows 100% of Terreton's ZIP codes mapped into designated flood zones, paired with an NFIP record of 1 claim. That footprint places local flood exposure in the range where it warrants attention without rising to high-severity planning territory.
Terreton has a moderate flood history with 1 FEMA claims. 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>$2,200</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 Terreton
- 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 65% of homes built before 1986, lead solder is a real possibility.
Deep Dive Reports
Detailed analysis for Terreton, ID