Drinking water quality · 2023
· Verified
· PWSID CA3710037
What's in Padre Dam MWD — Santee, Ca, CA tap water
Every one of the 14 core regulated contaminants reported for Padre Dam MWD — Santee, Ca, CA came in below its federal limit.
- !2 contaminants within 20% of a limit
- !14 of 27 core regulated contaminants reported — 13 never appear in this report
- ✓Nothing over a federal limit
- ✓No open federal violations
+How this score is calculated
Every system starts at 100. Points come off for measured levels, for the federal violation record, and for how much of the core regulated set the utility actually reported. All three inputs are the utility's own published numbers and EPA's own records.
- −0 contaminants at or above a federal limit
- −8 contaminants within 20% of a limit
- −0 open health-based violations
- −0 open monitoring / reporting violations
- −0 health-based violations resolved in the last 5 years
- −8 core regulated contaminants never reported (14/27)
A 90–100 · B 80–89 · C 70–79 · D 60–69 · F below 60. A system reporting under a third of the core set is capped at C however clean its numbers look — a short report is not a clean bill of health.
Full grading methodology, constant for constant →What to worry about
- Chloramine90% of the federal limit0.52–3.6 mg/L · limit 4 mg/L
Holds disinfection further into the pipe network, but is regulated under the same residual-disinfectant cap as chlorine.
higher than 80% of U.S. systems
- Bromate85% of the federal limit0–8.5 ug/L · limit 10 ug/L
Classified as a probable human carcinogen; the EPA sets a strict maximum contaminant level.
Higher than 95% of CA systems that report it · higher than 90% of U.S. systems
+18 contaminants were measured and came in below the limitShow all
| Contaminant | Measured | Federal limit |
|---|---|---|
| Arsenic | 0–4.9 ug/L | 10 ug/L |
| TTHM | 3.4–35 ug/L | 80 ug/L |
| Gross Alpha | 0–4 pCi/L | 15 pCi/L |
| Fluoride | 0.3–0.9 mg/L | 4 mg/L |
| Copper | 0.28 mg/L | 1.3 mg/L |
| Radium 226 228 | 0.3–0.93 pCi/L | 5 pCi/L |
| HAA5 | 0–8.4 ug/L | 60 ug/L |
| Lead | 0.002 mg/L | 0.015 mg/L |
| Turbidity | 0.01–0.13 NTU | 1 NTU |
| Barium | 95–122 ug/L | 2000 ug/L |
| Chromium | 0–0.32 ug/L | 100 ug/L |
| Nitrate | Not detected mg/L | 10 mg/L |
| Aluminum | 60–230 ug/L | — |
| Selenium | Not detected ug/L | 50 ug/L |
| Escherichia coli (E. coli) | 0 | — |
| Total Coliform | Not detected % | — |
| Gross Beta Particle Activity | 0–5 pCi/L | — |
| Uranium | 0–3 pCi/L | 20 pCi/L |
What this report doesn't tell you
13 of the 27 contaminants a community water system normally reports do not appear anywhere in Padre Dam MWD — Santee, Ca, CA's data. Absent is not the same as absent-from-the-water — it means nobody published a number.
+Full detail: PFAS testing, water source, historical monitoring, and the federal violation record
Compliance history
Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.
- Maximum contaminant level exceededHealth-based1 violation on record · most recent Mar 1995resolved
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗