Is Hammon, OK Tap Water Safe to Drink?
Graded B+, with 3 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
82.4/100
waterverge.com Hammon, OK — Water Quality Report
Hammon's drinking water received a grade of B+ (82.4 out of 100), indicating good water quality. The city's 1 water system serves approximately 568 residents using purchased ground water.
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 13 violations on record, including 1 health-based violation. 3 remain unresolved.
What to know about Hammon's water
Hammon ranks #65 out of 358 cities in Oklahoma for water quality, placing it above average in the state.
Hammon purchases its water from a regional wholesaler, meaning quality depends on both the supplier's treatment and the local distribution system's condition.
As a small community water system, Hammon may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
The system has seen 7 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Hammon, OK water safe to drink?
Hammon's drinking water has significant quality concerns based on EPA testing data. With a grade of B+ (82.4/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 568 residents using groundwater (wells).
Recent water quality updates for Hammon
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Hammon's water quality assessment. Grade: B+ (82.4/100).
1 health-based. Contaminants: LEAD AND COPPER RULE REVISIONS.
Contaminants: Consumer Confidence Rule.
Contaminants: Revised Total Coliform Rule.
Federal disaster declaration (FEMA DR-3219). Hurricane event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Hammon's water supply.
Well within EPA limits.
Violation history
Hammon's water system has 13 total violations on record, including 1 health-based violation. 3 remain unresolved. 7 violations were issued in the last 5 years.
Flood & environmental risk
Roger Mills County has experienced 1 federally declared disaster since 2005. Flooding and severe storms can overwhelm water treatment plants, cause sewage overflows, and introduce agricultural runoff, bacteria, and sediment into drinking water supplies. Local water sources include Washita River Near Hammon.
Where does Hammon's water come from?
Hammon's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 568 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Washita River Near Hammon (river).
What Hammon residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Hammon'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.
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 Hammon
Industrial polluters nearby
Reported releases to surface water by facilities near Hammon, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
ROGER MILLS GAS PROCESSING PLANT HAMMON, OK73650 | — | — | 0.7 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Drought conditions
D3 — extreme droughtRoger Mills 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
Roger Mills County has experienced 1 federally declared disaster since 2005. 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 Hammon compares by contaminant
Explore where Hammon ranks among all Oklahoma cities for specific contaminants.
Water source & infrastructure
Where Hammon's water comes from
Hammon purchases its water supply from a regional wholesale provider rather than treating raw water directly.
Water quality depends on both the wholesaler's treatment standards and the condition of Hammon's local distribution pipes and storage facilities.
Purchased water systems are common in suburban areas and smaller communities that lack the infrastructure for independent treatment.
The system is operated by local government ownership and serves approximately 568 people through 1 water system.
Water bodies near Hammon
Hammon is located near 1 notable water body. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Hammon
| System Name | PWSID | Population | Source |
|---|---|---|---|
| HAMMON | OK3006503 | 568 | GWP |
How Hammon compares
Full Oklahoma rankings →Hammon's score of 82.4/100 is above the average of 45/100 among major Oklahoma cities. It outscores 10 of 10 nearby cities.
Nearby cities
View Oklahoma rankings →About Hammon, OK
Learn more about your water
Guides and resources related to Hammon's water quality findings.
Explore water quality across Roger Mills
Frequently asked questions
Is Hammon, OK tap water safe to drink?
Hammon's water quality earned a grade of B+ (82.4/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #65 out of 358 cities tested in Oklahoma.
What contaminants are in Hammon's water?
Lead was measured at 0.0 ppb (90th percentile). 13 violations are on record.
How is Hammon'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 Hammon?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Hammon's water come from?
Hammon's water is sourced from Purchased ground water. The city has 1 water system serving approximately 568 residents.
What health violations has Hammon's water system had?
Hammon has 1 health-based violation on record. The most recent violation was recorded in October 2024. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 3 violations remain unresolved.
Is Hammon's groundwater at risk of contamination?
Hammon 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 13 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 Hammon's water compare to other cities?
Hammon ranks #65 out of 358 cities in Oklahoma (better than 82% of state cities) and #7009 out of 15744 cities nationally (56th percentile). The grade of B+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Hammon's small water system affect quality?
Hammon's system serves approximately 568 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 13 violations on record.