June 14, 2026
Norman, OK Water Quality Report 2026
Unlock the full breakdown — detected levels vs. legal limits, plus what removes each one.
Full contaminant breakdown
EPA Six-Year Review compliance monitoring, 2012–2019 — the most recent national compliance dataset EPA has published. See the sections above for more recent violation and PFAS records.
| Contaminant | Avg. detected | Highest sample | Federal limit | Avg. vs. limit |
|---|---|---|---|---|
| Gross alpha radioactivityEPA health goal: zero | 9.17 pCi/L | 48.8 pCi/L | 15 pCi/L | 61% |
| ArsenicEPA health goal: zero | 5 ppb | 30.4 ppb | 10 ppb | 50% |
| Chromium (total) | 45 ppb | 98.1 ppb | 100 ppb | 45% |
| UraniumEPA health goal: zero | 10.4 ppb | 35.5 ppb | 30 ppb | 35% |
| Antimony | 1.41 ppb | 3.67 ppb | 6 ppb | 24% |
| Radium (combined)EPA health goal: zero | 0.975 pCi/L | 4.93 pCi/L | 5 pCi/L | 20% |
| Thallium | 0.388 ppb | 0.4 ppb | 2 ppb | 19% |
| Haloacetic acids (HAA5) | 10.7 ppb | 24.6 ppb | 60 ppb | 18% |
| PentachlorophenolEPA health goal: zero | 0.16 ppb | 0.16 ppb | 1 ppb | 16% |
| Total trihalomethanes (TTHMs) | 11.9 ppb | 57.3 ppb | 80 ppb | 15% |
| Simazine | 0.559 ppb | 1.4 ppb | 4 ppb | 14% |
| DEHP (phthalate)EPA health goal: zero | 0.8 ppb | 1.1 ppb | 6 ppb | 13% |
| Barium | 242 ppb | 894 ppb | 2000 ppb | 12% |
| DichloromethaneEPA health goal: zero | 0.61 ppb | 0.61 ppb | 5 ppb | 12% |
| Fluoride | 495 ppb | 1090 ppb | 4000 ppb | 12% |
| LeadEPA health goal: zero | 1.84 ppb | 8 ppb | 15 ppb (action level) | 12% |
| Selenium | 5.33 ppb | 21.7 ppb | 50 ppb | 11% |
| Nitrite | 84.9 ppb | 415 ppb | 1000 ppb | 8% |
| Nitrate + nitrite | 454 ppb | 2280 ppb | 10000 ppb | 5% |
| Cyanide | 7.92 ppb | 18.3 ppb | 200 ppb | 4% |
| Nitrate | 399 ppb | 1050 ppb | 10000 ppb | 4% |
| Cadmium | 0.141 ppb | 0.144 ppb | 5 ppb | 3% |
| Copper | 24 ppb | 160 ppb | 1300 ppb (action level) | 2% |
| Toluene | 6.25 ppb | 11.6 ppb | 1000 ppb | 1% |
| 2,4-D | 0.2 ppb | 0.3 ppb | 70 ppb | <1% |
Also tested, no detections: 1,1,1-Trichloroethane, 1,1,2-Trichloroethane, 1,1-Dichloroethylene, 1,2,4-Trichlorobenzene, 1,2-Dichloroethane, 1,2-Dichloropropane, 2,4,5-TP (Silvex), Alachlor, Atrazine, Benzene, Benzo(a)pyrene, Beryllium, Carbofuran, Carbon tetrachloride, Chlordane, Chlorobenzene, DBCP, DEHA (adipate), Dalapon, Dinoseb, Diquat, Endothall, Endrin, Ethylbenzene, Ethylene dibromide (EDB), Glyphosate, Heptachlor, Heptachlor epoxide, Hexachlorobenzene, Hexachlorocyclopentadiene, Lindane, Mercury (inorganic), Methoxychlor, Oxamyl, PCBs, Picloram, Styrene, Tetrachloroethylene (PCE), Toxaphene, Trichloroethylene (TCE), Vinyl chloride, Xylenes (total), cis-1,2-Dichloroethylene, o-Dichlorobenzene, p-Dichlorobenzene, trans-1,2-Dichloroethylene.
Reverse osmosis (drinking water)
The treatment category most often matched to dissolved contaminants like lead, arsenic, nitrate, fluoride, and radiological contaminants detected in this system.
Shop reverse osmosis →Whole-house carbon filtration
The treatment category most often matched to disinfection byproducts (TTHMs, haloacetic acids), chlorine taste and odor, and organic compounds detected in this system.
Shop whole-house systems →Source: U.S. EPA Six-Year Review 4 compliance monitoring data (2012–2019), the most recent nationwide compliance dataset EPA has released, reported at the water-system level. A detection is not a violation. “Avg. vs. limit” compares the average of laboratory detections to the federal MCL or action level; individual faucets can differ — household plumbing affects lead and copper, and a state-certified laboratory test of your own tap is the only way to confirm levels in your home. Treatment categories are general matches, not a certification claim for a specific product and contaminant.
Water Utility: Norman Utilities Authority
Population Served: 104,868 residents
Data Sources: EPA SDWIS + EPA UCMR5
Report Year: 2026
Norman, Oklahoma drinking water is supplied by Norman Utilities Authority. All US public water systems must test drinking water and report results to the EPA under the Safe Drinking Water Act. This report summarizes health-based violations and PFAS detections recorded in federal databases to help you make informed decisions about home water filtration.
EPA Health-Based Violation History
The following contaminants exceeded EPA maximum contaminant levels (MCLs) at this utility since 2010:
| Contaminant | Violation Years | Filter Solution |
|---|---|---|
| Arsenic | 2013-2014 | Under Sink Filters |
| Gross Alpha, Excl. Radon And U | 2012-2014 | Water Filters |
| Lead And Copper Rule Revisions | 2024 | Whole House Filters |
Source: EPA Safe Drinking Water Information System (SDWIS), updated quarterly. Health-based violations only.
PFAS "Forever Chemical" Detections
PFAS compounds were detected in this water system during EPA's Fifth Unregulated Contaminant Monitoring Rule (UCMR5) testing program (2023-2025). EPA has set maximum contaminant levels of 4 parts per trillion (ppt) for PFOA and PFOS individually.
| PFAS Compound | Level Detected | Solution |
|---|---|---|
| PFBA | 0.0055 ug/L | PFAS Filters |
| PFBS | 0.0030 ug/L | PFAS Filters |
Source: EPA UCMR5 occurrence data. Levels in micrograms per liter (ug/L = parts per billion). 1 ug/L = 1,000 ppt.
Should You Filter Your Norman Water?
Even utilities with no EPA violations may have contaminants present below legal limits but above health guidelines. The EPA sets maximum contaminant levels based on what is feasible and affordable to treat at scale -- not necessarily what carries zero health risk. Many independent health organizations recommend filtration for households with children, pregnant women, or immunocompromised individuals regardless of utility compliance status.
Protect Your Norman Home Water
PureWaterGuys.com carries filtration systems certified to reduce arsenic and other heavy metals. We ship to all Oklahoma addresses with free expert guidance on the right system.
Shop Under-Sink Water Filters →Take the Water QuizFilters for Norman, OK Water Issues
Based on contaminants detected in this report, these systems are worth considering:
NSF-certified filters proven to remove PFAS, PFOA, PFOS, and 200+ contaminants.
Shop PFAS / Forever Chemicals Filters →
Reverse osmosis systems that reduce nitrates to safe levels.
Shop Nitrates / Nitrites Filters →
Whole-house carbon filters that eliminate chlorine taste, odor, and DBPs.
Shop Chlorine / Disinfection Byproducts Filters →
RO systems certified to reduce radium, radon, and uranium.
Shop Radiological Contaminants Filters →
Frequently Asked Questions
Is Norman tap water safe to drink?
Norman Utilities Authority is required to meet EPA federal drinking water standards. However, meeting legal standards is not the same as being contaminant-free. Trace levels of disinfection byproducts, PFAS compounds, and other regulated contaminants are common in US municipal water systems.
Does Norman water have PFAS?
PFAS compounds were detected in this utility's water during EPA UCMR5 monitoring. A certified PFAS filter -- such as reverse osmosis or activated carbon block -- can significantly reduce these compounds at your tap.
What water filter works best for Norman?
A whole-house carbon block filter removes chlorine, chloramines, and many VOCs. For PFAS, arsenic, and nitrates, a reverse osmosis under-sink system provides the highest reduction rates. Take our free 2-minute quiz to find the right system for your home and budget.
Data sourced from EPA SDWIS and UCMR5 federal databases. PureWaterGuys.com is not affiliated with any municipal water utility. Contact your utility's annual Consumer Confidence Report (CCR) for complete local data.