We read 38 results from City of Corpus Christi’s 2025 water quality report. No results over a legal limit; 6 above a health goal or guideline.
Serves about 318,387 people · Water system ID TX1780003 · Read the district’s 2025 report (opens in a new tab)
Open this district in the water lookupCompare with your own test results, see the district map and get matched filters.
Results from the 2025 report
Each number is copied from the district’s report and links to the page it’s printed on. Where the report lists several plants, wells or purchased water, the highest is shown.
| Contaminant | Result | Health goal | Legal limit | What it means |
|---|---|---|---|---|
| Chloriteaverage · range 0.23 to 0.61 · Distribution system · 2025 report, page 4 | 0.49 ppm | 0.05 ppm | 1 ppm | Above the health goal9.8x the health goal |
| Gross beta (radioactivity)highest measured · sampled 2023 · Treatment plants · 2025 report, page 4 | 11 pCi/L | 0 pCi/L | 50 pCi/L | Above the health goalThe health goal is zero |
| Lead90th percentile of homes tested, 0 over the action level · sampled 2023 · Customer taps · 2025 report, page 5 | 1.7 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal8.5x the health goal |
| Total coliform bacteriahighest month · Distribution system · 2025 report, page 5 | 0.92 % positive | 0 % positive | 5 % positive | Above the health goalThe health goal is zero |
| Total dissolved solidsaverage · System · 2025 report, page 6 | 643 ppm | — | 500 ppm guideline | Above the guideline1.3x the guideline (taste, odor or stains; not a health limit) |
| Uraniumhighest measured · sampled 2023 · Treatment plants · 2025 report, page 4 | 1 ppb | 0.6 ppb | 30 ppb | Above the health goal1.7x the health goal |
| Aluminumaverage · System · 2025 report, page 6 | 0.12 ppm | — | 0.2 ppm guideline | Within the guideline |
| Arsenichighest measured · Treatment plants · 2025 report, page 4 | Not detected | 0.004 ppb | 10 ppb | Not detected |
| Bariumhighest measured · Treatment plants · 2025 report, page 4 | 0.12 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chloraminehighest running annual average · range 1.37 to 4.32 · Distribution system · 2025 report, page 5 | 3.33 ppm | None set | 4 ppm | Below the legal limit |
| Chlorideaverage · System · 2025 report, page 6 | 178 ppm | — | 250 ppm guideline | Within the guideline |
| Chlorine dioxideaverage · range ND to 30 · Treatment plants · 2025 report, page 5 | 20 ppb | None set | 800 ppb | Below the legal limit |
| Copper90th percentile of homes tested, 0 over the action level · sampled 2023 · Customer taps · 2025 report, page 5 | 0.03 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Cyanidehighest running annual average · range ND to 150 · Treatment plants · 2025 report, page 4 | 80 ppb | 150 ppb | 200 ppb | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 5.4 to 17.2 · Distribution system · 2025 report, page 5 | 14 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 19.7 to 61.8 · Distribution system · 2025 report, page 5 | 47 ppb | None set | 80 ppb | Below the legal limit |
| E. colias reported · Distribution system · 2025 report, page 5 | Not detected | 0 positive samples | 0 positive samples | Not detected |
| Fluoridehighest measured · Treatment plants · 2025 report, page 4 | 0.48 ppm | 1 ppm | 4 ppm | Below the health goal |
| Nitrate (as N)highest measured · Treatment plants · 2025 report, page 4 | 1.5 ppm | 10 ppm | 10 ppm | Below the health goal |
| Seleniumhighest measured · Treatment plants · 2025 report, page 4 | 4 ppb | 30 ppb | 50 ppb | Below the health goal |
| Sulfateaverage · System · 2025 report, page 6 | 116 ppm | — | 250 ppm guideline | Within the guideline |
| Turbidity (cloudiness)highest measured · Plant 2, highest of 2 sources · 2025 report, page 5 | 0.2 NTU | None set | 1 NTU | Below the legal limit |
| Alkalinityaverage · System · 2025 report, page 6 | 151 ppm | None set | None | No health limit |
| Bromodichloromethaneaverage · range 3.5 to 8.7 · Distribution system · 2025 report, page 5 | 7 ppb | None set | None | No health limit |
| Bromoformaverage · range ND to 2 · Distribution system · 2025 report, page 5 | 1.6 ppb | None set | None | No health limit |
| Calciumaverage · System · 2025 report, page 6 | 70 ppm | None set | None | No health limit |
| Chloroformaverage · range 7.2 to 29.1 · Distribution system · 2025 report, page 5 | 18.8 ppb | None set | None | No health limit |
| Dibromochloromethaneaverage · range 7.2 to 22 · Distribution system · 2025 report, page 5 | 15.2 ppb | None set | None | No health limit |
| Hardnessaverage · System · 2025 report, page 6 | 13.8 gpg (236 ppm) | — | — | Very hard |
| Lithiumaverage · range 18.7 to 26.2 · sampled 2023 · Treatment plants · 2025 report, page 6 | 21.7 ppb | None set | None | No health limit |
| Magnesiumaverage · System · 2025 report, page 6 | 14.8 ppm | None set | None | No health limit |
| Nickelaverage · System · 2025 report, page 6 | 2 ppb | None set | None | No health limit |
| PFBA (a PFAS)average · range 7.3 to 11.5 · printed as 0.0096 ppb · sampled 2023 · Treatment plants · 2025 report, page 6 | 9.6 ppt | None set | None | No health limit |
| PFHxA (a PFAS)average · range ND to 3.8 · printed as 0.0038 ppb · sampled 2023 · Treatment plants · 2025 report, page 6 | 3.8 ppt | None set | None | No health limit |
| PFPeA (a PFAS)average · range ND to 5.6 · printed as 0.0045 ppb · sampled 2023 · Treatment plants · 2025 report, page 6 | 4.5 ppt | None set | None | No health limit |
| Potassiumaverage · System · 2025 report, page 6 | 9.4 ppm | None set | None | No health limit |
| Sodiumaverage · System · 2025 report, page 6 | 121 ppm | None set | None | No health limit |
| Total organic carbonaverage · range 3.75 to 6.02 · Source water · 2025 report, page 4 | 4.93 ppm | None set | None | No health limit |
Utility results describe the whole system, measured where water enters the pipes, not your tap. Your home’s plumbing can add lead or copper.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in City of Corpus Christi’s water between Jan 2023 and Oct 2023. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- Lithium26.2 ppbFound in 4 of 4 samples · highest resultAbove EPA’s health reference level of 10 ppb (a guide, not a legal limit)
Source: EPA UCMR 5 occurrence data. The highest single result is shown; one high sample doesn’t mean every glass is that high.
What you can do
Nothing here is an emergency notice: if the district has a violation, it must tell customers directly. If you’d like to lower these at your tap, these are the treatments that remove them, and the catalog shows the models certified for each. Ranking is by certified removal; commissions never change the order.
Radium and uranium
Found: Gross beta (radioactivity), Uranium
What removes it: Reverse osmosis.
Lead
Found: Lead
What removes it: Certified carbon block or RO.
Bacteria and viruses
Found: Total coliform bacteria
What removes it: UV purification (and tell your utility).
Salty taste / high TDS
Found: Total dissolved solids
What removes it: Reverse osmosis.
More districts: Texas water quality · All states · Something look wrong? Tell us