Canterbury Groundwater Risk Checker

Enter any Canterbury address or place name to receive a groundwater contamination risk assessment using live data from ECan's monitoring network.

Live ECan ArcGIS data
⚠️ Proxy URL not configured. Open this file in a text editor and set PROXY_BASE to your Vercel deployment URL. See README.md for instructions.
Very low (<1 mg/L N-NO₃)
Low (1–5 mg/L N-NO₃)
Moderate (5–11 mg/L N-NO₃)
High (>11 mg/L N-NO₃ / E. coli risk)

Indicative risk only — not a substitute for laboratory testing. Nitrate (N-NO₃) risk levels are expert estimates informed by real ECan well locations, land use context, and monitoring history; individual concentration values are accessible via the lab results links on each well. E. coli risk is assessed on likelihood of detection based on land use, well construction, and rainfall. Always consult a qualified water testing laboratory and your local health authority for drinking water safety decisions. ECan monitoring data may be subject to QA delays of up to 3 months.