Is Corn, OK Tap Water Safe to Drink?
Graded B, with 10 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
79.5/100
waterverge.com Corn, OK — Water Quality Report
Corn's drinking water received a grade of B (79.5 out of 100), indicating good water quality. The city's 1 water system serves approximately 500 residents using groundwater.
Lead levels were measured at 0.0 ppb (90th percentile), well within EPA limits. This system has not yet been tested for PFAS under the EPA UCMR 5 program.
The system has 55 violations on record, including 14 health-based violations. 10 remain unresolved.
What to know about Corn's water
Corn ranks #85 out of 358 cities in Oklahoma for water quality, placing it above average in the state.
Corn relies on groundwater, which is generally less vulnerable to surface contamination but can be affected by naturally occurring minerals like arsenic and nitrate, as well as agricultural and industrial runoff.
As a small community water system, Corn may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
The system has seen 8 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Corn, OK water safe to drink?
Corn's drinking water has significant quality concerns based on EPA testing data. With a grade of B (79.5/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 500 residents using groundwater (wells).
Recent water quality updates for Corn
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Corn's water quality assessment. Grade: B (79.5/100).
Contaminants: TTHM, Total Haloacetic Acids (HAA5).
1 health-based. Contaminants: LEAD AND COPPER RULE REVISIONS.
Contaminants: Chlorine, Lead and Copper Rule.
Federal disaster declaration (FEMA DR-3219). Hurricane event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-778). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Corn's water supply.
Well within EPA limits.
Violation history
Corn's water system has 55 total violations on record, including 14 health-based violations. 10 remain unresolved. 8 violations were issued in the last 5 years.
Flood & environmental risk
Washita County has experienced 3 federally declared disasters since 1982. Flooding and severe storms can overwhelm water treatment plants, cause sewage overflows, and introduce agricultural runoff, bacteria, and sediment into drinking water supplies.
Where does Corn's water come from?
Corn's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 500 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate.
What Corn residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Corn's water.
Your water utility is required to publish an annual Consumer Confidence Report (CCR) with detailed testing results. Ask for the latest copy or check your utility's website.
Corn's area has a history of flooding. After severe weather, watch for boil water advisories from your local utility.
Data: EPA SDWIS, UCMR 5 (PFAS), FEMA, NOAA. Last updated May 2026.
Top contaminants to know
View all ↓Violation summary
Violations & advisories
Top industrial polluters within 10 miles of Corn
Industrial polluters nearby
Reported releases to surface water by facilities near Corn, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
ENABLE PRODUCTS/CLINTON NATURAL GAS PROCESSING PLANT CLINTON, OK73601 | — | — | 9.3 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Drought conditions
D3 — extreme droughtWashita County is currently in D3 (extreme drought) per the U.S. Drought Monitor (week of May 5, 2026). Drought can elevate disinfection-byproduct (TTHM/HAA5) levels and taste/odor issues as utilities draw from lower reservoirs.
Source: U.S. Drought Monitor, updated weekly by NDMC, USDA, and NOAA.
Flood & disaster history
Washita County has experienced 3 federally declared disasters since 1982. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
Full contaminants report
| Contaminant | Detected Level | EPA Limit | Unit | Category | Status |
|---|---|---|---|---|---|
| Lead (90th percentile) LeadHeavy Metal A toxic heavy metal that can leach into drinking water from older pipes, solder, and fixtures. No amount of lead in water is considered safe. Health EffectsBrain and nervous system damage in children, kidney damage, high blood pressure, and reproductive problems in adults. EPA Limit15 ppb action level Common SourcesCorrosion of lead pipes, lead solder, brass faucets, and household plumbing. | 0.0 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Corn compares by contaminant
Explore where Corn ranks among all Oklahoma cities for specific contaminants.
Water source & infrastructure
Where Corn's water comes from
Corn's drinking water is drawn from underground aquifers through wells.
Groundwater is naturally filtered through rock and soil layers, generally requiring less treatment than surface water. However, it can contain naturally occurring contaminants like arsenic, radon, and minerals.
Agricultural activity, septic systems, and industrial operations near well fields can introduce nitrates, pesticides, and volatile organic compounds.
The system is operated by local government ownership and serves approximately 500 people through 1 water system.
Water systems serving Corn
| System Name | PWSID | Population | Source |
|---|---|---|---|
| CORN PWA | OK2007501 | 500 | GW |
How Corn compares
Full Oklahoma rankings →Corn's score of 79.5/100 is above the average of 45/100 among major Oklahoma cities. It outscores 9 of 10 nearby cities.
Nearby cities
View Oklahoma rankings →About Corn, OK
Wikipedia →Corn is a town in Washita County, Oklahoma, United States. As of the 2020 census, Corn had a population of 592.
Learn more about your water
Guides and resources related to Corn's water quality findings.
Explore water quality across Washita
Frequently asked questions
Is Corn, OK tap water safe to drink?
Corn's water quality earned a grade of B (79.5/100). Some concerns have been identified. Consider a water filter for an extra layer of protection. The city ranks #85 out of 358 cities tested in Oklahoma.
What contaminants are in Corn's water?
Lead was measured at 0.0 ppb (90th percentile). 55 violations are on record.
How is Corn's water quality grade calculated?
The grade is based on four factors: violation history (40%), lead and copper levels (25%), PFAS contamination (25%), and regulatory compliance (10%). The score is also adjusted based on how complete the available data is. See our methodology page for full details.
Do I need a water filter in Corn?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Corn's water come from?
Corn's water is sourced from Groundwater. The city has 1 water system serving approximately 500 residents.
What health violations has Corn's water system had?
Corn has 14 health-based violations on record. The most recent violation was recorded in January 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 10 violations remain unresolved.
Is Corn's groundwater at risk of contamination?
Corn uses groundwater, which can be affected by naturally occurring contaminants like arsenic, radon, and nitrate, as well as agricultural runoff and industrial activity. The system has 55 violations on record that may relate to groundwater quality. Groundwater systems are generally less susceptible to surface contamination but should be monitored for emerging contaminants like PFAS.
How does Corn's water compare to other cities?
Corn ranks #85 out of 358 cities in Oklahoma (better than 76% of state cities) and #8257 out of 15744 cities nationally (48th percentile). The grade of B reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Corn's small water system affect quality?
Corn's system serves approximately 500 residents. Small community water systems (under 3,300 people) may have fewer financial resources for infrastructure upgrades and advanced treatment technologies. However, they are held to the same EPA drinking water standards as larger systems. This system has 55 violations on record.