Norwich, ND: High Radon Risk — 40/100 (2026)
1 ZIP code · 2 water systems · Updated 2026-06-03
Public water compliance in Norwich falls below the ND baseline — elevated violation rates are on record.
How Norwich Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Norwich Water
- Homes built before 1986: 79% — older plumbing may contain lead solder.
- Estimated remediation: $1,700 per household.
- CDC health risk index: 14.21 — above typical levels.
Who Supplies Your Water in Norwich
Residential addresses in Norwich, ND are served by 2 primary water providers out of 2 systems in federal records. Each system maintains separate infrastructure and files its own EPA compliance reports, so service conditions are not uniform across the city.
Overview
We track water quality and home safety data for 1 ZIP code in Norwich, North Dakota (population ~305), covering 2 community water systems serving approximately 50,108 people region-wide.
No EPA violations recorded across any ZIP codes in Norwich — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Norwich: D (40/100)
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
Norwich water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Norwich
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 1 (High 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 |
|---|---|---|---|
| 58768 | D | City of Minot | 48,743 |
All ZIP Codes in Norwich
- 58768 [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 Norwich
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 Norwich
With 79% 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, Norwich is predominantly an older city — a median build year of 1950 puts most of the residential inventory in the range where pre-1986 plumbing materials were the standard.
Over half of homes in Norwich 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 Norwich Homeowners
In Norwich, property values comfortably outpace what documented remediation typically costs — the equity share is proportionally low.
Remediation costs in Norwich are relatively low compared to home values. The $1,100–$2,300 estimated range is a small fraction of median property value. Home values are 8% above the North Dakota average.
Lead Exposure Risk for Children in Norwich
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 Norwich — 79% 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 Norwich
- 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 79% 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 Norwich, ND