Retaking the FE Environmental exam
In the most recent NCEES reporting year, FE Environmental was attempted 2,543 times by first-time examinees, who passed at 67 percent — and 1,092 times by repeat examinees, who passed at 37 percent. The retake is a harder exam only in one sense: it is usually taken with the same preparation that already failed once.
Attempt counts and pass rates: NCEES Squared 2025, set beside every other discipline on FE exam pass rates by discipline. Policy facts were checked August 31, 2026 against the NCEES FE exam page, scoring page, and May 2026 Examinee Guide.
Where the FE Environmental exam is won
Your diagnostic report scores you in the same 15 knowledge areas as the current specification, each on a 0–15 scale against the average of passing examinees. Question counts are not uniform, and that asymmetry should drive the plan: the four heaviest areas — Water and Wastewater (12-18), Fluid Mechanics and Hydraulics (12-18), Surface Water Resources and Hydrology (9-14) and Groundwater, Soils, and Sediments (8-12) — together account for roughly 46 of the 110 questions on this form. A below-average score in any of them costs more than a weak showing in a four-question area ever can.
| Knowledge area (as on your diagnostic report) | NCEES range | This form |
|---|---|---|
| Mathematics | 5-8 | 6 |
| Probability and Statistics | 4-6 | 4 |
| Ethics and Professional Practice | 5-8 | 5 |
| Engineering Economics | 5-8 | 5 |
| Fundamental Principles | 7-11 | 8 |
| Environmental Chemistry | 7-11 | 8 |
| Health Hazards and Risk Assessment | 4-6 | 5 |
| Fluid Mechanics and Hydraulics | 12-18 | 13 |
| Thermodynamics | 3-5 | 3 |
| Surface Water Resources and Hydrology | 9-14 | 10 |
| Groundwater, Soils, and Sediments | 8-12 | 9 |
| Water and Wastewater | 12-18 | 14 |
| Air Quality and Control | 8-12 | 9 |
| Solid and Hazardous Waste | 7-11 | 7 |
| Energy and Environment | 4-6 | 4 |
Treat the water sequence as one connected system
Fluid mechanics and hydraulics, hydrology, groundwater, and water and wastewater account for 46 problems on this form. Map misses across that sequence: a weak hydraulics foundation can surface later as a hydrology or treatment error even when the chapter labels differ.
Repair sequence
- Begin with conservation, units, and hydraulic relationships, then redo the missed fluid-mechanics problems without relying on the original solution path.
- Move through hydrology and groundwater before water and wastewater so flow, storage, and transport assumptions remain visible from one set to the next.
- Add air quality, solid waste, chemistry, and risk questions to a final mixed block; the retake still tests the whole environmental specification.
Readiness check
Score the four water-related rows separately as well as together. Improvement should appear upstream in hydraulics and downstream in the application areas, rather than coming only from a familiar treatment problem set.
Planning the second attempt
- Sort the areas on your diagnostic report into below, near, and above the passing-examinee line, then multiply by the weights above. Spend 60–70 percent of your study time where below-line meets high-weight.
- Practice against the reference handbook on screen, never from memory — locating the governing equation in seconds is a scored skill on this exam.
- Before booking, take one full 110-problem timed form and score it by knowledge area. Set that column beside your diagnostic report. Book when the below-line areas have visibly moved; adjust the plan when they have not. The exam fee is USD 225 per attempt, and NCEES allows one attempt per testing window and no more than three attempts in a 12-month period — spend attempts on evidence, not hope.
The FE Environmental practice exam is a complete 110-problem form in the current FE Environmental specification: every problem original and independently verified, worked solutions that name the governing handbook equation, and a score sheet grouped by knowledge area so the result reads like your diagnostic report.
Not sure yet? Every knowledge area has a free problem with its complete worked solution. Start with the free FE Environmental water and wastewater practice problem — 14 of the 110 problems on this form sit in that area.