Question 1

What is the population of Lagny-le-Sec?

Accepted Answer

The commune of Lagny-le-Sec has 2,046 inhabitants per the INSEE census.

Question 2

Are there natural risks in Lagny-le-Sec?

Accepted Answer

No natural risk is listed for Lagny-le-Sec in the GASPAR / Géorisques database.

Question 3

What is the energy performance of homes in Lagny-le-Sec?

Accepted Answer

Out of 104 ADEME EPCs available in Lagny-le-Sec, the most common label is C. 13% are rated A or B.

Question 4

What is the crime rate in Lagny-le-Sec?

Accepted Answer

In 2025, the crime rate in Lagny-le-Sec was 13.2 offences per 1,000 inhabitants (burglaries, theft, violence, vandalism). Source: SSMSI / French Ministry of the Interior.

Question 5

Is the tap water safe to drink in Lagny-le-Sec?

Accepted Answer

Tap water in Lagny-le-Sec is compliant with quality standards. Source: ARS / Hub'eau. (703 analyses over 12 months)

Question 6

What is the air quality in Lagny-le-Sec?

Accepted Answer

According to LCSQA stations (5-year mean) in Lagny-le-Sec: PM2.5 : 9.9 µg/m³, NO₂ : 19.0 µg/m³, PM10 : 16.7 µg/m³. Source: LCSQA / Géod'air.