Drinking water quality · 2023
· Verified
· PWSID CA3600306
What's in Thunderbird Cwd — Apple Valley, Ca, CA tap water
Every one of the 17 core regulated contaminants reported for Thunderbird Cwd — Apple Valley, Ca, CA came in below its federal limit.
- !1 contaminant within 20% of a limit
- !17 of 27 core regulated contaminants reported — 10 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
- −4 contaminants within 20% of a limit
- −0 open health-based violations
- −0 open monitoring / reporting violations
- −2 health-based violations resolved in the last 5 years
- −3 core regulated contaminants never reported (17/27)
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
- Nitrate91% of the federal limit9.1 mg/L · limit 10 mg/L
Levels above the federal limit can cause 'blue baby syndrome,' a serious oxygen-transport condition in infants.
Higher than 95% of CA systems that report it · higher than 95% of U.S. systems
+26 contaminants were measured and came in below the limitShow all
| Contaminant | Measured | Federal limit |
|---|---|---|
| Fluoride | 1.7 mg/L | 4 mg/L |
| Arsenic | 2.3 ug/L | 10 ug/L |
| Chlorine | 0.72 mg/L | 4 mg/L |
| Copper | 0.12 mg/L | 1.3 mg/L |
| Barium | 130 ug/L | 2000 ug/L |
| HAA5 | 1.5 ug/L | 60 ug/L |
| TTHM | 0.55 ug/L | 80 ug/L |
| Perchlorate | 0 ug/L | — |
| Cyanide | 0 ug/L | 200 ug/L |
| Nitrite | 0 mg/L | 1 mg/L |
| Aluminum | 0 ug/L | — |
| Antimony | 0 ug/L | 6 ug/L |
| Beryllium | 0 ug/L | 4 ug/L |
| Boron | 130 ug/L | — |
| Cadmium | 0 ug/L | 5 ug/L |
| Calcium | 80 mg/L | — |
| Lead | 0 ug/L | 15 ug/L |
| Magnesium | 14 ug/L | — |
| Mercury | 0 ug/L | 2 ug/L |
| Nickel | 0 ug/L | — |
| Potassium | 2.9 mg/L | — |
| Selenium | 0 ug/L | 50 ug/L |
| Thallium | 0 ug/L | 2 ug/L |
| Vanadium | 13 ug/L | 50 ug/L |
| Escherichia coli (E. coli) | 0 | 0 |
| Chromium | 0 ug/L | 100 ug/L |
What this report doesn't tell you
10 of the 27 contaminants a community water system normally reports do not appear anywhere in Thunderbird Cwd — Apple Valley, 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-based9 violations on record · most recent Dec 2024resolved
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗