Water Quality Report · Updated October 07, 2026
NORMAN UTILITIES AUTHORITY
NORMAN UTILITIES AUTHORITY delivers tap water graded F (50/100) by TapWaterSafety.org. The utility serves approximately 104,868 residents in NORMAN, Oklahoma using surface water. The most significant water quality concerns are: Chromium (hexavalent) significantly above health guideline; Arsenic significantly above health guideline; Haloacetic acids (HAA9) significantly above health guideline. For questions, the utility can be reached at 405-321-2182.
Is NORMAN tap water safe to drink?
NORMAN UTILITIES AUTHORITY delivers tap water that earns a grade of F (50/100) from TapWaterSafety.org — a poor rating, with significant contamination concerns and/or recent violations.
The utility serves 104,868 residents in NORMAN, drawing from surface water.
Public testing data identifies 17 contaminants in this water above EWG's health-based guidelines, including: Chromium (hexavalent), Arsenic, Haloacetic acids (HAA9), Haloacetic acids (HAA5), Total trihalomethanes (TTHMs), Dichloroacetic acid, Radium, combined (-226 and -228), Bromodichloromethane, Uranium, Chloroform, Trichloroacetic acid, Bromate, Dibromoacetic acid, Dibromochloromethane, Nitrate and nitrite, Nitrate, Vanadium. For most residents, a properly certified home filter at the kitchen tap is the most cost-effective way to reduce exposure to whatever's in your water. See our filter recommendations below, matched specifically to this utility's contaminant profile.
EPA compliance record
Official U.S. EPA records for NORMAN UTILITIES AUTHORITY (system ID OK1020801) for the last 3 years. Checked 2026-10-07.
| Rule | Type | Since | Status |
|---|---|---|---|
| Lead and Copper Rule Revisions | Missed reporting | 10/17/2024 | Open |
| Lead and Copper Rule Revisions | Required treatment not met | 10/17/2024 | Open |
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Quick actions for NORMAN residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for NORMAN UTILITIES AUTHORITY.
Chromium (hexavalent) significantly above health guideline
Moderate concernChromium (hexavalent) detected at 39.3 ppb, 1967x above the EWG health guideline of 0.02 ppb.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 4.68 ppb, 1170x above the EWG health guideline of 0.004 ppb.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 16.7 ppb, 278x above the EWG health guideline of 0.06 ppb.
Contact NORMAN UTILITIES AUTHORITY
Reach the utility directly for service issues, water quality concerns, or to request your Consumer Confidence Report.
General Contact
Treatment Plant
Recommended water filters for NORMAN
Filters matched to the specific contaminants in this water supply.
Reverse osmosis certified for arsenic (NSF/ANSI 58)
$429-$599Reverse osmosis certified under NSF/ANSI 58 for arsenic is the most reliable home option.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
Score breakdown
This utility's overall score of 50/100 breaks down across five weighted components. Read the full methodology →
Contaminants detected — international standards comparison
Every contaminant detected, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal (the strictest US benchmark). Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Chromium (hexavalent) Heavy metal |
39.3 ppb | 0.02 | — | — | — | — | — | 1967× over |
| Arsenic Heavy metal |
4.68 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 1170× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
16.7 ppb | 0.06 | — | — | — | — | — | 278× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
7.85 ppb | 0.1 | 60.0 | 60 | — | — | — | 79× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
5.79 ppb | 0.15 | 80.0 | 100 | — | — | — | 39× over |
| Dichloroacetic acid Disinfection byproduct |
7.1 ppb | 0.2 | — | — | — | — | — | 35× over |
| Radium, combined (-226 and -228) Radiological |
1.63 pCi/L | 0.05 | 5.0 | — | — | — | — | 33× over |
| Bromodichloromethane Disinfection byproduct |
0.798 ppb | 0.06 | — | — | — | — | — | 13× over |
| Uranium Radiological |
4.5 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | 10× over |
| Chloroform Disinfection byproduct |
2.75 ppb | 0.4 | — | — | — | — | — | 6.9× over |
| Trichloroacetic acid Disinfection byproduct |
0.611 ppb | 0.1 | — | — | — | — | — | 6.1× over |
| Bromate Disinfection byproduct |
0.602 ppb | 0.1 | 10.0 | 10 | 10 | 0.1 | — | 6.0× over |
| Dibromoacetic acid Disinfection byproduct |
0.121 ppb | 0.03 | — | — | — | — | — | 4.0× over |
| Dibromochloromethane Disinfection byproduct |
0.353 ppb | 0.1 | — | — | — | — | — | 3.5× over |
| Nitrate and nitrite Inorganic |
0.409 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 2.9× over |
| Nitrate Inorganic |
0.321 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 2.3× over |
| Vanadium Other |
26.9 ppb | 21.0 | — | — | — | — | — | 1.3× over |
| Simazine Pesticide/Herbicide |
0.0558 ppb | 0.1 | 4.0 | — | — | — | — | Below guideline |
| Barium Heavy metal |
193.5 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Selenium Heavy metal |
5.42 ppb | 30.0 | 50.0 | 20 | 40 | 30 | — | Below guideline |
| Bromoform Disinfection byproduct |
0.0417 ppb | 0.5 | — | — | — | — | — | Below guideline |
| Chlorate Disinfection byproduct |
17.5 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Heptachlor epoxide Other |
0.000287 ppb | 0.006 | 0.2 | — | — | — | — | Below guideline |
| Benzo[a]pyrene Other |
0.000217 ppb | 0.007 | 0.2 | — | — | — | — | Below guideline |
| Molybdenum Other |
0.61 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
0.398 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Perfluorobutanoic Acid (PFBA) PFAS |
1.38 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Endrin Other |
0.000341 ppb | 0.3 | 2.0 | — | — | — | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
0.0438 ppb | 53.0 | — | — | — | — | — | Below guideline |
| 2,4-D Pesticide/Herbicide |
0.0148 ppb | 20.0 | 70.0 | — | — | — | — | Below guideline |
| Strontium Radiological |
0.423 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
0.281 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| Chromium (total) Heavy metal |
36.3 ppb | — | 100.0 | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.493 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Germanium Other |
0.00844 ppb | — | — | — | — | — | — | Below guideline |
| Lithium Other |
7.01 ppb | — | — | — | — | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines (4th ed.), California OEHHA PHGs, EWG Tap Water Database.
NORMAN UTILITIES AUTHORITY service area
This water system serves 1 community in Cleveland County, Oklahoma. Click any city for its dedicated tap water quality page.
Find the right filter for NORMAN water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.