If you don't have a pH measurement tool you can check on the internet if your municipality published a report of its tap water. You can then add lemon juice concentrate to get down your pH level if needed (0.1ml per liter to get ph level down by 0.5). If you're growing with organic soil it's fine if the pH of your tap water is not higher than 7.5, because the micro organisms in the soil will bring down the pH level automatically. As others suggested, if you're concerned about chlorine you can just leave it in a bucket for 12-24h and it should evaporate (you can also check chlorine levels in a water quality report)