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Is Stratford Water Safe to Drink?
City of Stratford · 2025 data · official source
This is the safety page for Stratford — how hard the water is (and what that costs) lives on the Stratford water hardness page · see how Stratford compares across all of Ontario on the Ontario hardness guide · or browse every Ontario city by safety status on the Ontario water quality page.
Stratford's water has Fluoride above the Health Canada legal limit. See the breakdown below and consider a filter rated for that contaminant.
What's in Stratford's water
Detected contaminants reported for City of Stratford.
Source: Ontario Ministry of Environment, Conservation and Parks — municipal test results, 2024-25.
Fluoride exceeds the Health Canada legal limit. This is worth investigating — a filter rated for that contaminant may be appropriate.
How to read this table: the legal limit (Health Canada's Maximum Acceptable Concentration (MAC)) is the enforceable safety line — it's what regulators actually require. A contaminant above its aesthetic guideline (like iron or sodium) affects taste or staining — not your health.
| Contaminant | Typical level | Health Canada limit | Status |
|---|---|---|---|
| Fluoride | 2.06 mg/L | 1.5 mg/L | Above limit |
| Barium | 183 µg/L | 1000 µg/L | Below limit |
| Boron | 90 µg/L | 5000 µg/L | Below limit |
| Trihalomethanes (total) | 30 µg/L | 100 µg/L | Below limit |
| Total Haloacetic acids | 16.1 µg/L | no guideline | No guideline |
| Arsenic | 0.7 µg/L | 10 µg/L | Below limit |
| Lead | 0.17 µg/L | 10 µg/L | Below limit |
| Chromium | 0.12 µg/L | 50 µg/L | Below limit |
| Uranium | 0.091 µg/L | 20 µg/L | Below limit |
| Selenium | 0.07 µg/L | 50 µg/L | Below limit |
| NITRITE (as nitrogen) | 0.019 mg/L | 1 mg/L | Below limit |
| NITRATE (as nitrogen) | 0.008 mg/L | 10 mg/L | Below limit |
| Nitrate + Nitrite (as nitrogen) | 0.008 mg/L | 10 mg/L | Below limit |
| Cadmium | 0.003 µg/L | 5 µg/L | Below limit |
Levels are typical (median) municipal test results. The legal limit is Health Canada's Maximum Acceptable Concentration (MAC). Note: in some samples, one or more of these parameters exceeded the guideline (shown as a typical/median value here).
Not sure what these levels mean for your health? Read our complete contaminants guide — what's detected vs. what matters, and how to read the numbers.
What actually matters in Stratford's water
Most of the numbers in the table are below the legal limit and aren't worth your worry. Here's the honest read on the ones people actually ask about in Stratford:
Why the limit exists: There is no safe level of lead. It is a developmental neurotoxin — even low exposure is linked to delays in children's physical and mental development and attention deficits, and to kidney problems and high blood pressure in adults.
Who it matters most for: Children (especially under 6) and pregnant women.
Source: EPA AL / HC MAC
Why the limit exists: Arsenic is a Group 1 human carcinogen (IARC). The limit is based on increased risk of bladder, lung, and skin cancer, plus skin damage and circulatory problems at elevated long-term exposure.
Source: EPA MCL / HC MAC
Why the limit exists: The limit protects infants from "blue baby syndrome" (methemoglobinemia). Infants under six months convert nitrate to nitrite and lack the enzyme to reverse it, so their blood can't carry oxygen. Cases occur above 10 mg/L, not at or below.
Who it matters most for: Infants under 6 months (especially formula-fed).
Source: EPA MCL / HC MAC
Why the limit exists: Same rationale as nitrate — nitrite directly causes methemoglobinemia ("blue baby syndrome") in infants, and the 1 mg/L limit reflects that nitrite is the more immediately toxic of the pair.
Who it matters most for: Infants under 6 months.
Source: EPA MCL / HC MAC
Why the limit exists: Trihalomethanes are disinfection byproducts. Long-term exposure above the limit is associated with liver, kidney, and central nervous system problems plus an increased risk of cancer (most consistently bladder). The limit is a deliberate trade-off: you can't remove them without abandoning disinfection, which would risk far worse microbial disease.
Source: EPA MCL / HC MAC
Why the limit exists: Haloacetic acids are disinfection byproducts associated with an increased risk of cancer at sustained elevated exposure. Same trade-off as TTHMs — the limit balances cancer risk against the necessity of disinfection.
Source: EPA MCL / HC MAC
Why the limit exists: Chromium-6 (the hexavalent form) is a known carcinogen when inhaled and is associated with stomach and intestinal tumors in drinking-water studies; the total-chromium MCL covers all forms. The basis is allergic dermatitis plus the cancer concern from the hexavalent form.
Source: EPA MCL
Why the limit exists: Uranium is both a kidney toxin and a weak alpha-emitter (radioactive); the limit is set for kidney toxicity and the associated increased cancer risk from long-term exposure.
Source: EPA MCL / HC MAC
Why the limit exists: Barium at elevated levels can increase blood pressure and affect the cardiovascular system; the limit is set for those effects from long-term exposure.
Source: EPA MCL / HC MAC
Why the limit exists: Fluoride is added to protect teeth, but above the limit it can cause bone disease (pain and tenderness) and mottled teeth in children. This is a "protecting from excess" limit, not a "removing a poison" limit.
Who it matters most for: Children (tooth mottling at high exposure).
Source: EPA MCL / HC MAC
Why the limit exists: Boron at elevated levels is associated with reproductive and developmental effects in animal studies; the advisory is precautionary. It is rarely near concern in treated municipal water.
Source: EPA HRL / HC
Why the limit exists: Selenium at elevated levels can cause hair and fingernail loss, numbness in fingers or toes, and circulatory problems.
Source: EPA MCL / HC MAC
Why the limit exists: The limit protects infants from "blue baby syndrome" (methemoglobinemia). Infants under six months convert nitrate to nitrite and lack the enzyme to reverse it, so their blood can't carry oxygen. Cases occur above 10 mg/L, not at or below.
Who it matters most for: Infants under 6 months (especially formula-fed).
Source: EPA MCL / HC MAC
Why the limit exists: Cadmium is linked to kidney damage and is a probable carcinogen; the limit is set for kidney toxicity from long-term exposure.
Source: EPA MCL / HC MAC
Where Stratford's water comes from — and how it's treated
11 groundwater wells
Like every Canadian municipal supply, Stratford's water is disinfected (typically chlorine or chloramine) and monitored against Health Canada's Guidelines for Canadian Drinking Water Quality, enforced provincially. If you want to read the raw report for yourself, our how to read your water quality report guide walks you through it line by line.
Water quality vs. water hardness — don't confuse the two
"Water quality" (is it safe to drink) and "water hardness" (how much scale it leaves) are entirely different things — and confusing them leads to bad purchases. See the Stratford water hardness page for the hardness picture.
If contaminants concern you — add a drinking-water filter
Should you filter Stratford's water?
The softener handles hardness; a drinking-water filter removes Arsenic and removes Lead — if Stratford's reported levels concern you. EPA: Arsenic is a known human carcinogen (skin, lung, bladder cancer) and, at exposure, is also linked to cardiovascular disease and developmental effects. EPA MCL: 10 ppb. EPA / CDC: There is no safe level of lead, and it is especially harmful to children (developmental and neurological damage). EPA action level: 15 ppb at the tap. For a full breakdown of what each filter type removes, see best whole-house water filters.
We may earn a commission when you buy through links on our site. This doesn't affect our recommendations. Full disclosure.
When to call a professional
Stratford's water has Fluoride above the legal limit, so this is the one case where having a professional look at your tap — not just the city-wide average — is genuinely worth it. A licensed water-treatment specialist can test your home's water specifically, confirm whether your plumbing is contributing anything extra, and recommend a correctly-rated filter (for PFAS, a point-of-use reverse-osmosis or granular-activated-carbon system, for example).
Certified, independent results come from a state/province-licensed lab, not a company with a sales incentive — ask for a lab that reports to Health Canada or your province.
Frequently asked questions
Is Stratford tap water safe to drink?
Stratford water has contaminant(s) above the legal limit. Review the breakdown below before drinking unfiltered.
Who tests Stratford's water, and how often?
City of Stratford samples and reports under provincial drinking-water regulations, tested continuously for microbiological safety and routinely for chemical parameters. Results are summarized in the provincial and municipal reports linked on this page.
Where does Stratford drinking water come from?
11 groundwater wells
Should I filter Stratford's tap water?
Yes — a filter rated for the specific contaminant(s) above the limit is worth considering. See the full breakdown for which one matters.
Is Stratford water hard?
See the Stratford water hardness page — hardness is a separate concern from safety.
Sources & method
All contaminant levels are drawn from official, published data — Ontario Ministry of Environment, Conservation and Parks — municipal test results, 2024-25 (source). We cite the legal limit for each contaminant so you never see a bare scare number.
- · City of Stratford — water-quality report we reviewed
- · Health Canada — Guidelines for Canadian Drinking Water Quality
- · Government of Canada — Water quality
- · USGS — Water Hardness
- · Water Quality Association — Scale & Hardness
- · EPA — Drinking Water Regulations
- · Our complete contaminants guide (what's detected vs. what matters, how limits are set)
- · How to read your water quality report — line by line
Compare Stratford to Other Ontario Cities
How Stratford's water quality stacks up against nearby cities — same Ontario data, same legal limits.
Other Cities With Exceedances
Cities where a contaminant also runs above the legal limit — see how they compare to Stratford.
Explore More
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💧 Water treatment pros: this page is yours to share
This page helps customers understand what's in their water and whether they need a filter — so they can weigh whether service is worth it. We recommend sharing this page along with our complete contaminants guide in your next quote or follow-up to fully explain the value of your services.