Circleville, Ohio Water Quality Report
Hardness levels, common contaminants, and what Circleville homeowners should know about their tap water — updated August 2026.
Circleville Water at a Glance
Water Hardness Meter — Circleville
At 17 grains per gallon, Circleville water is classified as Very Hard. For context, anything above 10.5 gpg is considered hard; Columbus-area water typically runs 15–18 gpg.
Common Water Problems in Circleville
Circleville water at 17 gpg causes rapid scale buildup on water heaters, dishwashers, and plumbing. Pickaway County's limestone geology is the primary source of the calcium and magnesium that drive hardness.
Pickaway County is one of Ohio's most productive farming counties. Nitrates and herbicide residues from agricultural runoff are a real concern for Circleville's water supply. An RO system provides critical protection for drinking water.
Circleville area water can carry iron levels at or near the EPA secondary standard of 0.3 mg/L. Homeowners sometimes notice orange staining on fixtures, laundry, and toilet bowls.
Circleville residents sometimes notice changes in water taste or odor during spring and summer, related to algae growth in the Scioto River watershed and seasonal treatment adjustments.
Recommended Treatment for Circleville Water
Based on typical Circleville water chemistry, these systems address the most common issues.
Addresses Circleville's 17 gpg hardness, protects appliances and plumbing, and improves skin and hair health.
Removes nitrates, iron, and agricultural contaminants — critical for Pickaway County's farming-intensive water shed.
Reduces chlorine taste and odor throughout the home, improving water quality at every faucet and shower.
Iron Level: 0.1–0.3 mg/L
Iron above 0.3 mg/L causes orange staining on fixtures, laundry, and appliances. The EPA secondary standard is 0.3 mg/L. If you notice rust-colored stains or metallic taste, a dedicated iron filter may be needed alongside a water softener.
Iron filter optionsCircleville Water FAQs
How hard is Circleville, Ohio water?
Circleville water tests at approximately 17 grains per gallon (gpg), or about 291 mg/L. This is classified as very hard. Pickaway County sits on thick limestone bedrock, which is the primary source of hardness minerals in the water supply.
Does Circleville water have nitrates?
Pickaway County is one of Ohio's most intensively farmed counties, which increases the risk of nitrate contamination from agricultural runoff. Circleville's water plant monitors nitrate levels, but an under-sink reverse osmosis system provides the most reliable protection — especially for households with infants or pregnant women.
Is Circleville water safe to drink?
Circleville water meets all EPA Safe Drinking Water Act standards. However, given the agricultural intensity of Pickaway County and the high hardness level, most homeowners benefit from a water softener plus an RO system for drinking water.
What's the best water softener size for Circleville?
At 17 gpg, Circleville homes need a properly sized softener — typically a 32,000–48,000 grain capacity unit for an average household. The right size depends on your household size and water usage. Our free water test includes a sizing recommendation.
Know exactly what's in your Circleville water.
Our free in-home water test gives you precise numbers — hardness, iron, pH, TDS, chlorine — at your tap. No obligation, no pressure.