Tap water · OK
Oklahoma City Utilities
EPA system ID OK1020902 · serves about 644,000 people. Every US utility must publish an annual water quality report — here’s the official one (2025), and below it, our plain-English translation.
Read the official report →What Oklahoma City Utilities found in 2025
20 detected analytes from the utility’s own annual report, hand-normalized — 1 was near or over a limit (flagged below).
| Detected | Level | Limit | % of limit | Status |
|---|---|---|---|---|
| TTHM | 64 ppb | 80 ppb | 80% | Near limit |
| COMBINED RADIUM (-226 & -228) | 3 pCi/L | 5 pCi/L | 60% | Within limit |
| TOTAL HALOACETIC ACIDS (HAA5) | 32 ppb | 60 ppb | 53% | Within limit |
| FLUORIDE | 0.58 ppm | 4 ppm | 15% | Within limit |
| GROSS ALPHA, EXCL. RADON & U | 2.14 pCi/L | 15 pCi/L | 14% | Within limit |
| GROSS BETA PARTICLE ACTIVITY | 6.17 pCi/L | 50 pCi/L | 12% | Within limit |
| NITRATE-NITRITE | 0.682 ppm | 10 ppm | 7% | Within limit |
| NITRATE | 0.682 ppm | 10 ppm | 7% | Within limit |
| COPPER, FREE | 0.06 ppm | 1.3 ppm | 5% | Within limit |
| BARIUM | 0.092 ppm | 2 ppm | 5% | Within limit |
| CARBON, TOTAL | 4.237 ppm | 10,000 ppm | 0% | Within limit |
| LEAD (90th percentile) | 0 ppb | 15 ppb | 0% | Within limit |
| SODIUM | 176 MG/L | — | — | No federal limit |
| ALKALINITY, TOTAL | 47 MG/L | — | — | No federal limit |
| LITHIUM — 2024 monitoring | 40.425 µg/L | — | — | No federal limit |
| CARBON, DISSOLVED ORGANIC (DOC) | 3.06 MG/L | — | — | No federal limit |
| Chlorine/Chloramines (highest of multiple sources) | 3 MG/L | — | — | No federal limit |
| COLIFORM (TCR) | 1.25 % | — | — | No federal limit |
| Total Organic Carbon | 0.02 | — | — | No federal limit |
| PERFLUOROPENTANOIC ACID (PFPeA) — 2024 monitoring | 0.001 µg/L | — | — | No federal limit |
Levels and limits are as printed in the utility’s report (“limit” is the EPA MCL, action level, residual limit, or secondary guideline that applies to that row; “ND” = not detected). Utilities publish these reports annually — we re-check every covered utility each July, after the federal publication deadline. Detected doesn’t mean dangerous — most detections sit far below their limits. This is education, not medical advice.
Your tap, if it were a bottle
How Oklahoma City Utilities water stacks up against the bottled aisle
Same minerals, same units — the tap values below come from the utility’s report, placed next to the closest match in our bottled-water database.
| Mineral | Your tap | Closest bottled match |
|---|---|---|
| Sodium | 176 mg/L | Badoit at 180 mg/L |
Tap values are the headline levels from the utility’s annual report (often a highest or average figure); bottled values are label- or report-derived. A closest match is a numeric comparison, not an equivalence or an endorsement.
Zip codes covered
73097 · 73102 · 73103 · 73104 · 73105 · 73106 · 73107 · 73108 · 73109 · 73111 · 73112 · 73114 · 73117 · 73118 · 73119 · 73121 · 73127 · 73128 · 73129 · 73131 · 73132 · 73134 · 73135 · 73139 · 73141 · 73142 · 73149 · 73150 · 73151 · 73159 · 73162 · 73165 · 73169 · 73170 · 73173 · 73179
Boundary zips partially served by other systems are deliberately unlisted — check your exact zip.