Ohio vs Pennsylvania, Lake Water Quality Comparison
A data-driven comparison of lake water quality between Ohio and Pennsylvania, built from EPA Water Quality Portal monitoring data.
| Ohio | Pennsylvania | |
|---|---|---|
| Total Lakes | 52 | 4 |
| Average Score | 1 | 0 |
| Oligotrophic (Cleanest) | 0 | 0 |
| Eutrophic (High Nutrient) | 12 | 0 |
| Lakes with Invasives | 1 | 0 |
| Improving Trend | 3 | 1 |
| Declining Trend | 3 | 0 |
Analysis
Ohio has 52 lakes with nutrient and algae readings, against 4 in Pennsylvania. On average water quality, Ohio comes out ahead.Ohio counts 0 oligotrophic lakes, the clearest trophic class, against 0 in Pennsylvania.
Long-term monitoring shows 3 improving and 3 declining lakes in Ohio, versus 1 improving and 0 declining in Pennsylvania. Dataset coverage varies by state: Ohio has maximum-depth data for 0 lakes and documented fish species on 0, compared with 0 and 0 for Pennsylvania. Where a figure is zero, that state dataset has not yet been ingested — grades there rest on EPA clarity and nutrient measurements alone.
Frequently Asked Questions
Does Ohio or Pennsylvania have cleaner lakes?
Ohio lakes average a composite water-quality score of 1; Pennsylvania lakes average 0. Ohio has the better average water quality. Grades are computed from EPA Water Quality Portal clarity and nutrient measurements.
Which state has more measured lakes?
Ohio has 52 measured lakes while Pennsylvania has 4. Counts reflect lakes with enough EPA Water Quality Portal monitoring data to reae, not the total number of lakes in each state.