Water testing questions, answered

Order your kit and it arrives in one working day. Fill two bottles with the first water out of your tap (about five minutes), post them back free in the prepaid box, and your Water Health Score and Care Plan are ready within 3 working days of your sample arriving at our lab.

First thing in the morning, before anyone uses the tap, fill both bottles with the first water out of it, so we can see what's in your pipes. Fill until they're overflowing, then seal the lids very tightly. It takes about five minutes. Post them straight away. Premium's PFAS kit has its own process.

Yes, and it's one of the most useful things you can do. Each tap needs its own kit: choose 1, 2 or 3 taps on Test, Guard or Premium (Premium's PFAS test covers one tap) and everything arrives in one order. For example, compare the kitchen tap against the bathroom, or the same tap with and without your filter.

Within 3 working days of your sample arriving at our lab. PFAS results from WaterGraph Premium take 4 to 5 weeks after you post your sample.

WaterGraph is a water screening service. We work hard to provide accurate results that help you make informed decisions about your health and wellness, and we regularly run control tests to keep our accuracy high. Our processes were built with researchers at Imperial College London. We don't certify water as safe for drinking, and we don't offer a UKAS-accredited laboratory service. Where a reading points to a possible compliance issue, we tell you plainly and we always recommend an accredited lab test to confirm it.

It turns 8 readings into one 0–100 number you can track, compare, and improve. It's the headline for your home's water, and the baseline for measuring any fix you make.

A plain-English action list built from your results and your goals: what's fine, what needs attention, and the exact next step for each, free actions first.

Yes. Your Care Plan says what each issue is, exactly how to fix it, and what not to waste money on.

Most fixes are tap-level, such as jugs, fittings and filters, with no landlord required. And if something bigger turns up, your report is solid ground for that conversation.

Not for safety, in most homes: UK tap water nearly always meets the standards, though lead from old pipes is worth checking. But many people filter for wellness reasons: a better taste, less chlorine or limescale, or softer water on skin and hair. Filters remove different things, so the right one depends on what's in your water. A standard jug or carbon filter improves the taste of chlorine but doesn't remove nitrate or fluoride; reverse osmosis does. So test first, then buy for your water. Your Care Plan says whether a filter is worth it, which kind suits your readings, and what not to waste money on. We don't sell water filters or take payment to recommend products, so our advice is independent.

Sources: Drinking Water Inspectorate, compliance in 2025 · Idaho Department of Environmental Quality, fluoride · Oregon Health Authority, nitrate

Then our test is just for you. It tells you whether your filter's actually working. Many customers test filtered and unfiltered water side by side: choose two taps and label one filtered.

Yes. Every recommendation is chosen on your readings, your goals and the evidence for what works. No filter company or retailer has any say in your Care Plan, and no product is ever recommended because of a commercial relationship.