Nope,it hasn’t. If your glasses are fogging up in sync with your respiration rate or within a very short timeframe your mask is not sealing. Period. The only difference is when you have either have a valve mask, work with a face shield or similar things or in confined spaces - it’s basically impossible to fog up your glasses with a correctly positioned mask as the filter medium does work as a diffuser. If your mask does fog up suddenly despite a confirmed fit it usually is a warning sign for a breakdown of the filter medium.
(And believe me, we tried really hard - as part of a customer contract we tested all major mask manufacturers available in the EU, with a sample size in the 4 digit range, including UV fluid and thermal imaging tests)
I am fully aware that the equivalent of N95 is often seen as comparable to FFP2, but this is not actually quite correct. The FFP2 has a slightly worse filtration rate and a slightly higher resistance both for inspiration and expiration. Anyway, I intentionally wrote FFP3 as this is the recommended FFP class for Measles while within the NIOSH legislation only a N95 is recommended.
First of all: Where in your system was the sample taken? At the well? At a tank? At a faucet?
The answer to this question is important for the next steps.
Be aware that high lead content can also be an issue for plant watering and even showering.
If the sample has been taken at a endpoint (faucet) I would try to get another sample at the well directly. If you are “lucky” the acidity of the water is the reason lead is brought into your system from a section of your transport system. In that case replacing the transport layer (basically: Get new pipes) is the best approach - while it’s not cheap it is also not as expensive as filtering (or dealing with the health issues from lead, especially in the US).
If the well shows the same values you are screwed. There are basically two scenarios then: Your well installation itself is the problem - this is in theory “fixable” but expensive, but you might accidentally even poisoning your neighbours then. (The way to find out if it’s your installation is either with specialised equipment or, for some confirmation, get a sample from a neighbour who ideally life upstream from you)
If it’s not your well installation then it’s the well itself…and then you really really need a more extensive analysis: Lead in a ground water deposit is somewhat rare and often a indication something else is problematic - both because geologically lead is often next to other nasties, but also because human caused pollution with lead often goes with the real nasty stuff like arsenic,etc. And you really would want to find these. Then shit sadly becomes really expensive.