Can you get sick from a splash pad?

The short answer

Yes. Splash pads are one of the more common places for a child to pick up a diarrheal infection from water. From 1997 to 2022, health officials in 23 states and Puerto Rico reported 60 outbreaks linked to splash pads, with 10,611 people sick, 152 hospitalized and no deaths¹. Two thirds of those outbreaks, and 91% of the cases, were caused by Cryptosporidium, a parasite that chlorine barely touches.

The risk is not the same at every pad. It depends on what happens to the water after it hits the ground, and on what the children do on it. A pad that uses tap water once and sends it to the sewer has no way to carry one child's germs into the next child's spray. A pad that recirculates its water can, and the treatment that stops Cryptosporidium is ultraviolet light or ozone, not chlorine alone.

Two beliefs keep this question alive. One is that the water is chlorinated, so it must be safe. The other is that splash pads are unregulated, so none of them are. Both are half right. Chlorine kills most bacteria and viruses within minutes but lets Cryptosporidium survive for days, and regulation depends entirely on your state.

What the CDC count shows

The 2024 CDC report is the first national summary of splash pad outbreaks¹. These are the pathogens behind them:

The timing is as concentrated as the cause. Fifty seven of the 60 outbreaks began between May and August¹. The biggest ones were huge:

The median outbreak was 18 cases¹. The CDC says these numbers likely undercount, because the illness starts days after the visit, reporting is voluntary, and some health departments have no authority over splash pads at all.

Why chlorine is not enough

CDC recommends, and most jurisdictions require, at least 1 ppm free chlorine in public splash pad water. At that level most bacteria and viruses die within minutes. Cryptosporidium oocysts "can survive for >7 days in water with 1 ppm free chlorine" at 77 F and pH 7.2 to 7.8¹. A pad can pass every chlorine test and still spread it.

Splash pads also make chlorine harder to hold. Spraying the water aerosolizes the chlorine, and dirt from shoes, urine and feces use it up. In inspection data from 16 jurisdictions in five states, 10% of routine splash pad inspections found disinfectant levels too low or too high, and a Tennessee survey found 5 of 24 pads below 1 ppm¹. Low chlorine matters most for the bacterial and viral outbreaks: for those, the most reported causes were failed disinfection systems, then poor water testing.

Idaho in 2007 shows the gap for the parasite. A municipal splash park filtered its water through high-flow sand filters and chlorinated it before reuse. At least 50 people fell ill, an attack rate of 32% among those interviewed, and the relative risk of illness for visitors exposed to the splash features was 4.7². Water from the features and from an adjacent drinking fountain tested positive for C. hominis. The CDC's conclusion was that operators "cannot rely solely upon high-flow sand filtration and chlorine disinfection." Splash parks were not covered by the Idaho pool code at the time.

Why splash pads, more than pools

The design that removes the drowning risk creates the contamination risk. Splash pads are intended for children under 5, the age group in which health departments most often report gastrointestinal illness, and the one least likely to have mastered toileting and hygiene¹. Children sit and stand on the ground jets, which rinses diapers and bottoms that can carry up to 10 grams of feces, and they put their open mouths to the spray. Then the recirculating system collects that water and sprays it at the next child.

The parasite species says where the contamination came from. C. hominis, the human species, caused the three largest outbreaks; other species can point to feces from animals such as squirrels, birds and raccoons¹. Keeping wildlife and dogs off a pad is the same job as on the rest of the site, covered in insects and animals.

The CDC's contributing factor data points the same way. For outbreaks at splash pads alone, the factor most often reported for Cryptosporidium was person-related: the pad's main users being toddlers in diapers¹. For the bacterial and viral outbreaks it was maintenance. The first is fixed by treatment design and behavior; the second by an operator who tests the water.

How the rules differ by state

There is no federal splash pad rule. CDC's Model Aquatic Health Code (MAHC) is a model that states can adopt, and only 13 states regulated splash pads at all before 2000¹. Four sets of requirements, read side by side:

Three details from that table are worth knowing. The MAHC asks more of splash pads than of pools: a 3-log (99.9%) Cryptosporidium reduction on all the water, where pools need 2-log on a portion of it, precisely because splash pads are at higher risk¹. Indiana's 3 ppm minimum is three times the 1 ppm CDC figure, and its UV units must cut Cryptosporidium by 99.9% in a single pass, which a "supplemental" listing does not show⁵. Texas requires stand-alone pads built before May 1, 2010 to have their water tested for Cryptosporidium every 14 days⁶.

Texas also writes the visitor rules onto the sign, in letters at least 2 inches high: no diaper changing within 6 feet of the water feature, no use when ill with diarrhea, and do not drink the water⁶. That is a useful model even where nothing requires it, and playground signage covers how to post it.

What to do as a parent

You cannot test the water, but you can control most of what the CDC identifies as the person-related causes¹³:

If you want to know more, ask the operator two questions: does the water recirculate, and if so, is there UV or ozone treatment? A recirculating pad with both a disinfection system and a qualified operator is doing what the MAHC asks. Pair it with the five minute check in checking a playground as a parent, because hot concrete is the other splash pad injury: heat and burn risk explains why a dry pad can burn, and shade and heat design how owners prevent it.

If your child does get sick, Cryptosporidium symptoms usually start 2 to 10 days after exposure, 7 on average, and the main one is watery diarrhea that typically clears within 2 to 3 weeks⁴. Tell the doctor where the child played in water. First aid and emergencies covers the injuries that cannot wait.

What to do as an owner or operator

Before you build, choose between single-pass and recirculating with your health department in the room. The trade-offs in water, cost and regulation are set out in water and sand play, and the operating budget belongs in the asset plan described in park and municipal playgrounds. If you recirculate, specify UV or ozone listed for secondary disinfection, size it for 100% of the flow, and fit an automatic chlorine controller that shuts the features off when the residual drops, as Indiana requires⁵.

Then run it as the outbreaks say you should: test chlorine and pH through the day, log it, and have a trained operator on call. A fecal accident means clearing the pad and, in New York's code, flushing that water to waste rather than back to the tank⁸. The response kit and steps are in cleaning and sanitizing, the paperwork in records and documentation, and the daily routine in daily and weekly checks. For a childcare program using a pad, licensing rules come first; see childcare playgrounds.

Where this answer stops

The CDC data cover outbreaks, not every case: one sick child after a visit is not counted unless it is part of a cluster that a health department found and reported. The MAHC does not cover single-pass pads, so there is no model standard for them¹. The four state rules here are a sample, not a survey; your state may require more or nothing.

None of the sources here studied backyard splash mats or sprinklers filled from a garden hose. For water play at home, the guidance on standing water and pools and play areas applies. For public pads, supervision still matters on zero depth water, and sun exposure is covered in sun and UV protection.