We read 19 results from Rehoboth Pump District (Tui)’s 2025 water quality report. No results over a legal limit; 2 above a health goal or guideline.
Serves about 73,860 people · Water system ID DE0000991 · Read the district’s 2025 report (opens in a new tab)
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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 |
|---|---|---|---|---|
| Lead90th percentile of homes tested, 0 over the action level · listed as a violation in the report · sampled 2024 · Customer taps · 2025 report, page 36 | 0.7 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal3.5x the health goal |
| PFOA (a PFAS)average · range ND to 5 · Rehoboth District wells · 2025 report, page 36 | 1.4 ppt | 0.007 ppt | 4 ppt from 2029 | Above the health goal200x the health goal |
| Bariumhighest measured · range 0.03 to 0.15 · listed as a violation in the report · Rehoboth District wells · 2025 report, page 36 | 0.15 ppm | 2 ppm | 2 ppm | Below the health goal |
| Berylliumhighest measured · range ND to 0.53 · listed as a violation in the report · Rehoboth District wells · 2025 report, page 36 | 0.53 ppb | 1 ppb | 4 ppb | Below the health goal |
| Chlorideaverage · range 13 to 92 · Rehoboth District wells · 2025 report, page 36 | 26 ppm | — | 250 ppm guideline | Within the guideline |
| Chlorinehighest measured · range 0.92 to 1.2 · listed as a violation in the report · Distribution system · 2025 report, page 36 | 1.2 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of homes tested, 0 over the action level · listed as a violation in the report · sampled 2024 · Customer taps · 2025 report, page 36 | 0.04 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range ND to 1.36 · listed as a violation in the report · Distribution system · 2025 report, page 36 | 0.3 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 1.44 to 10.7 · listed as a violation in the report · Distribution system · 2025 report, page 36 | 7.26 ppb | None set | 80 ppb | Below the legal limit |
| Ironaverage · range ND to 0.39 · printed as 56 ppb · Rehoboth District wells · 2025 report, page 36 | 0.06 ppm | — | 0.3 ppm guideline | Within the guideline |
| Nitrate (as N)highest measured · range 0.6 to 6.6 · listed as a violation in the report · Rehoboth District wells · 2025 report, page 36 | 6.6 ppm | 10 ppm | 10 ppm | Below the health goal |
| PFHxS (a PFAS)average · range ND to 2.2 · Rehoboth District wells · 2025 report, page 36 | 0.2 ppt | None set | 10 ppt from 2029 | Below the legal limit |
| PFOS (a PFAS)average · range ND to 3.4 · Rehoboth District wells · 2025 report, page 36 | 0.8 ppt | 1 ppt | 4 ppt from 2029 | Below the health goal |
| pHaverage · range 7.09 to 8.3 · Rehoboth District wells · 2025 report, page 36 | 7.61 | — | — | Normal range |
| Seleniumhighest measured · range ND to 0.92 · listed as a violation in the report · Rehoboth District wells · 2025 report, page 36 | 0.92 ppb | 30 ppb | 50 ppb | Below the health goal |
| Total dissolved solidsaverage · range 80 to 268 · Rehoboth District wells · 2025 report, page 36 | 143 ppm | — | 500 ppm guideline | Within the guideline |
| Hardnessaverage · range 0.35 to 1.99 · Rehoboth District wells · 2025 report, page 36 | 0.82 gpg (14 ppm) | — | — | Soft |
| PFBS (a PFAS)average · range ND to 9.3 · Rehoboth District wells · 2025 report, page 36 | 1.3 ppt | None set | None | No health limit |
| Sodiumaverage · range 25 to 76 · Rehoboth District wells · 2025 report, page 36 | 42 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 Rehoboth Pump District (Tui)’s water between Apr 2024 and Oct 2024. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFOA4.4 pptFound in 2 of 24 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFBS5.8 pptFound in 4 of 24 samples · highest resultNo federal limit in force for this one
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.
Lead
Found: Lead
What removes it: Certified carbon block or RO.
PFAS ("forever chemicals")
Found: PFOA (a PFAS), PFOA (EPA testing)
What removes it: Reverse osmosis.
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