1
Three Mile Lake
Union County, Iowa · 9.1 mi from Green Valley Lake
- ++1.2 ft water clarity
- +Lower phosphorus (43 vs 103 µg/L)
Cleaner Lakes Than Green Valley Lake
2 lakes with lower nutrient and algae readings within 30 miles, ranked by the size of the improvement and by proximity.
Green Valley Lake carries nutrient and algae readings on record. Within 30 miles, 2 lakes read lower. Three Mile Lake (Union County, 9.1 mi away) is the closest meaningful upgrade.
Reviewed by LakeQuality Editorial Team · Updated
2
Nodaway Lake
Adair County, Iowa · 14.5 mi from Green Valley Lake
- ++1.3 ft water clarity
- +Lower phosphorus (57 vs 103 µg/L)
Stays via Stay22
Where to stay near Green Valley Lake
Compare cabins, hotels, and vacation rentals around Green Valley Lake in Iowa. The 2 lakes above sit within 30 miles, so one base reaches them all. Switch the map to Satellite to see how close each stay is to the water.
Top-rated places to stay near Green Valley Lake
Prices for Oct 23–25, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a trip to Green Valley Lake?
Get lake water-quality updates plus the best cabin & lodging deals near Green Valley Lake — straight to your inbox. No spam, unsubscribe anytime.
Reading the cohort
Only 2 lakes within a 30-mile radius read cleaner than Green Valley Lake on nutrients and algae. The narrow set of options reflects either a fairly clean lake to begin with or a region without a wide range of cleaner alternatives, so the trip-planning decision is more constrained than the headline "cleaner lakes nearby" suggests.
Three Mile Lake (Union County) is the closest cleaner option at 9.1 miles from Green Valley Lake: close enough to be a genuine substitute for most users, far enough that it isn't the same neighborhood lake. Worth the trip if water quality is the primary driver; less obvious if Green Valley Lake is on the way to other plans.
Each lake's nutrient and algae readings — total phosphorus, total nitrogen, chlorophyll-a, and turbidity — are shown beside the EPA National Lakes Assessment 2022 condition class for that lake's own ecoregion, so a reading is compared against the lakes it would naturally resemble. LakeQuality publishes no letter grade. Lower readings mean measurably less nutrient and algae in the water, not better scenery or access: the lake with the clearest, lowest-nutrient water can have worse boat-launch facilities or shoreline access than a neighbor, so the comparison is one input alongside the rest of trip planning. How the readings are classified is on our methodology page.
How this list is built
Sampled lakes on LakeQuality carry readings from EPA Water Quality Portal samples — nutrients and algae measured against EPA National Lakes Assessment ecoregion classes. Secchi is shown, not scored. To suggest cleaner alternatives, we filter lakes within 30 miles to those with strictly lower nutrient and algae readings, then rank by the size of the improvement with a small proximity tiebreak. Cross-state and limited-data lakes are excluded so the list stays locally relevant.