Pennsylvania Main Line Canal, Juniata Division, Canal Section · Photo: Finetooth, Ruhrfisch, U.S. Census · Public domainFEMA expects about as much hazard damage per building in Granville Township as in the typical U.S. town, mostly from river and rain flooding
On FEMA’s National Risk Index, Granville Township gets a B− for hazard risk: higher expected damage per building than 52% of U.S. towns, #772 of 1,037 in Pennsylvania. Most of that expected damage is river and rain flooding (89%). Flood insurance has paid 19 claims here since 1979.
Graded on FEMA’s expected yearly building damage per dollar of building value (NRI v1.20, December 2025), weighted by where residents live; flood claims are shown, not graded. How hazard risk is graded
What Granville Township faces
Each hazard’s share of the building damage FEMA expects here, and how its rate compares with the rest of the country.
River and rain flooding
Shares are of FEMA’s expected building damage, the measure the grade uses; ranks compare each hazard’s building-damage rate with all 85,154 U.S. census tracts. In FEMA’s terms, river and rain flooding is FEMA’s “Inland Flooding” (rivers and streams overflowing their banks, or rain overwhelming drainage). FEMA defines coastal flooding as high or rising tides and storm surge, so surge damage is counted there. Drought isn’t listed: FEMA counts its losses in crops only.
What’s behind Granville Township’s grade
River and rain flooding is 89% of the building damage FEMA expects in Granville Township, and Granville Township’s rate of river and rain flooding damage is higher than 73% of U.S. census tracts.
B− #772 of 1,037 in Pennsylvania; higher expected damage per building than 52% of U.S. towns (21,298).
All of Granville Township’s residents live in one census tract; the figures are that tract’s.
The typical Pennsylvania town has lower expected damage than 71% of U.S. towns; within the state, Granville Township has more expected damage per building than 74% of Pennsylvania towns.
In dollars, FEMA expects about $1.9M a year in losses across Granville Township: $1.7M to buildings, the rest to people and crops.
Does Granville Township flood? Sometimes: 19 flood claims since 1979
Every paid claim on a federal flood insurance policy in Granville Township, from FEMA’s records: 8.8 per 1,000 homes, more than 72% of the 13,809 U.S. towns with a flood insurance record.
- Tropical Storm Ivan6 claims · $111K
Granville Township isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Mifflin County.1 federal disaster brought FEMA money to Granville Township
Disasters that paid out in Granville Township itself (aid to households or repair grants to Granville Township), newest first, with that year’s flood claims.
- 2004Tropical Depression Ivan5 households applied for aid$19K aid approved6 flood claims paid for it, $111K
Mifflin County has had 13 natural disasters declared by the President since 1953, most often floods, then severe storms. Not counted: the 2005 Hurricane Katrina evacuee emergency, which covered counties that took in evacuees.
Old photos of Granville Township after a storm or flood belong in the town’s history. Add one, or share what you remember below.
Add to the Granville Township archive →Granville Township and its neighbors
Granville Township is 2nd of the 9 graded towns here, from least expected damage per building to most. Tap a town to see its hazards.
| Town | Hazard risk | Mostly (buildings) | Flood claims |
|---|---|---|---|
| Union Township | Bless damage than 59% | river and rain flooding | 8 |
| Granville Township | B−more damage than 52% | river and rain flooding | 19 |
| Brown Township | C+more damage than 63% | river and rain flooding | 58 |
| Derry Township | C+more damage than 65% | river and rain flooding | 3 |
| Fermanagh Township | Cmore damage than 74% | river and rain flooding | 27 |
| Oliver Township | C−more damage than 77% | river and rain flooding | — |
| Bratton Township | C−more damage than 77% | river and rain flooding | 20 |
| Milford Township | C−more damage than 78% | river and rain flooding | — |
| Lewistown | Dmore damage than 86% | river and rain flooding | 70 |
Hazard risk = FEMA’s expected yearly building damage per dollar of building value, vs. the 21,298 U.S. towns we grade; the map is shaded by fifths of the same scale. Flood claims = paid federal flood insurance claims on record.
Get ready for what Granville Township faces
A short kit for the hazards that drive the building damage here, what to check before you buy, and where neighbors get alerts.
- Turn around at flooded roads: a foot of moving water can carry off a car.
- Flood insurance usually takes 30 days to start, so buy it before the forecast.
- Keep papers and medicines up high, in a grab-and-go bag.
- Look up the address on FEMA’s flood map.
- Ask the seller or landlord whether it has ever flooded, and what flood insurance costs there.
- Get a flood insurance quote early: policies usually start 30 days after you buy.
Know where neighbors sign up for alerts? Add it to the Handbook so everyone has it.
Questions about natural hazards in Granville Township
Is Granville Township at risk for natural disasters?
On FEMA’s National Risk Index, Granville Township has higher expected damage per building than 52% of U.S. towns: B− for hazard risk, #772 of 1,037 in Pennsylvania. Most of the expected damage is river and rain flooding (89%). The figures are for the one census tract the town shares with its neighbors. This is FEMA’s model of an average year for today’s buildings, not a forecast.
Does Granville Township flood?
Flood insurance has paid 19 claims in Granville Township since 1979, $206K in all, or 8.8 per 1,000 homes, more than 72% of U.S. towns with a flood insurance record. The most claims came from Tropical Storm Ivan (6).
Is Granville Township in a flood zone?
Flood zones are drawn street by street, so the answer depends on the address: look it up on FEMA’s flood map. In Mifflin County, 8% of homes in mapped flood zones carry federal flood insurance, and 0.8% of all homes do.
How much is flood insurance in Granville Township?
FEMA’s Community Rating System list shows no discount for Granville Township’s flood program. Premiums depend on the building; policies usually start 30 days after you buy, so get a quote early.
What was the biggest storm in Granville Township?
By FEMA money that reached Granville Township, Tropical Depression Ivan (2004): 5 households applied for aid, $19K approved. By flood claims, Tropical Storm Ivan: 6 paid, $111K.
Is Granville Township at risk from river and rain flooding?
It is the largest share of the building damage FEMA expects here (89%), and Granville Township’s rate for it is higher than 73% of U.S. census tracts.
Storm stories
Memories, warnings and help from neighbors in Granville Township.
Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where Granville Township’s residents lived in the 2020 census; OpenFEMA: NFIP redacted claims, multiple-loss properties, community status book and residential penetration rates, housing assistance (owners and renters), public assistance funded projects, hazard mitigation properties and disaster declarations. Homes: Census ACS 2020–24. Preparedness tips: Ready.gov. FEMA’s model is an average of expected damage, not a forecast. How hazard risk is graded.