When comparing against simulations at a constant reservoir salt concentration and varying reservoir pH, we observed that the theoretical model accurately describes the microgel swelling at low and high pH values, capturing to a lesser degree the swelling in the regime pH ≈ pK a,acid . This discrepancy arises from the neglected correlations in the mean-field model, as shown through the shift in the ionization degree 7,65 and the condensation effects due to the chain-like charge densities. The model also provides the microgel net charge, which displays a reasonable agreement as well. Comparison of the nonlinear model with simulations for varying salt concentrations shows an accurate description of swelling. However, the model does not accurately capture the quantitative behavior of the microgel net charge.