Situated Evidence · Nigeria
Readings tied to a place, a date, and a method
Clarvex is an environmental investigative reporting unit publishing water and coastal measurements across Nigeria's watersheds, so residents and researchers can see conditions for themselves.
14
Watersheds covered
3,200+
Published readings
9
Coastal zones
6 yrs
Continuous monitoring
Our approach
Every measurement is anchored to somewhere real
We collect, verify, and publish water quality and coastal readings from communities across the Niger Delta and beyond, always naming the method used and the date collected. Nothing appears without a place attached to it.
- ✓Readings cross-checked against published guideline values
- ✓Sampling notes describing who collected each reading and how
- ✓Community observations reviewed by our environmental editor
What we offer
Ways to work with the unit
Environmental Readings Access
Monthly access to published measurement sets by watershed and coastal zone, with sampling notes and alerts.
Learn more →Community Monitoring Plan
A shared observation log for community organisations, with quarterly editorial review and a field sheet.
Learn more →Environmental Reporting Course
A four-week course on reading measurement data and writing responsibly about environmental conditions.
Learn more →From the field
Recent insights
Water Quality
Reading a Turbidity Table Without Overreaching
August 2026
What a rise in turbidity does and does not tell us about a creek's condition.
Coastal Zones
What Changes Along a Coastline Between Two Surveys
August 2026
Comparing two seasons of shoreline readings near Bonny.
Community Reporting
Describing Local Conditions in Consistent Terms
July 2026
A short guide for residents logging what they observe near a waterway.
Why it matters
We publish what was measured, not what we assume
- ✓Method and collector named on every reading
- ✓Comparison against named guideline sources, not guesswork
- ✓Community voices recorded alongside the numbers
- ✓Findings shared plainly, at a measured pace
If your community has a story worth documenting, we would be glad to hear it.
Reach out to the unitWho relies on us
From residents and researchers
"The sampling notes let our cooperative explain conditions to members without guesswork. That mattered more than we expected."
Ijeoma Okonta
Fishing Cooperative Lead
"As a graduate researcher, having dated, methodical readings saved me weeks of verification work on my thesis."
Tamuno Briggs
Environmental Studies Researcher
"The reporting course changed how I write about our creek. I stopped overstating things I couldn't support."
Efe Amadasu
Community Correspondent
Questions
Frequently asked
Get in touch