Roper Lake
Graham County, Arizona34 acresView mapDirections
Not enough samples to grade — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). No letter yet. Here is what we do have.
- Public access
- Limited data
Roper Lake in Graham County, Arizona is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 34 acres.
- Area
- 34 acres
- Public access
- Yes
Stays via Stay22
Stays near Roper Lake
Compare lakeside cabins, hotels, and vacation rentals near Roper Lake in Graham County, Arizona — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Roper Lake
Prices for Sep 11–13, 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 whole trip? See where to stay at Arizona’s top lakes →
Watch Roper Lake’s letter
Email me if this lake’s grade moves. Grades stay free.
Or email
Why Roper Lake has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Roper Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by ADEQ and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Roper Lake is a 34-acre lake in Graham County, Arizona. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, ADEQ, last sampled 2022-04-04. Grade methodology: LakeQuality methodology.
What Roper Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Roper Lake
These readings exist but are not enough for an A–F grade — see why.
No clarity data.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples |
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 34 acres |
| Public Access | Yes |
No bathymetric survey has been published for Roper Lake, so its depth is not documented here.
Recreation & Access
- Roper Lake State ParkPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Roper Lake
Reservoir Info (USACE NID)
Roper Lake is a man-made reservoir impounded by the Roper Lake (completed 1961), built primarily for recreation on the Tr -Stockton Wash - Os; earth-type dam, 17 ft tall and 2,964 ft long.
- Surface area
- 34 ac
- Normal storage
- 313 ac-ft
- Drainage area
- 0.24 sq mi
- Hazard class
- High
- Owner
- ARIZONA GAME & FISH DEPARTMENT
All listed purposes: Recreation;Water Supply.
Source: USACE National Inventory of Dams, NID ID AZ00091 · Operator website
Graded lakes near Roper Lake
Roper Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Graham County
Frequently asked questions about Roper Lake
Where is Roper Lake?
- Roper Lake is a lake in Graham County, Arizona. LakeQuality has not rated this lake (UNRATED) — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
What is the water quality grade for Roper Lake?
- Roper Lake in Graham County, Arizona is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 34 acres.
Is Roper Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
Are there boat ramps on Roper Lake?
- Roper Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Roper Lake State Park. Public access is listed as yes.
Explore Roper Lake across LakeQuality
2 thermal springs within 20.2 mi, nearest Grapevine Spring
Species activity outlook by water temperature and season
Where to stay at Arizona's top lakes, each with its grade
Arizona's cleanest and most-polluted lakes, ranked
More Arizona Lake Rankings
Other Lakes in Arizona
Where this data comes from
4 measurements from 1 monitoring station, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Great Lakes Environmental Center
GLEC4 samples · 2022
Analytical methods
- 4500 P E ~ Phosphorus in Water by Colorimetry- Ascorbic Acid Method
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Named boat-access points from the USGS National Boat Ramps inventory