How to get the values of multiple checkboxes in Angular 8

I am trying to get the values of the checkboxes that are selected. I have the following code:

<div style="background-color:lightblue;" >
    <div class="content">
       <label class="label">Province</label>
       <div class="form-check form-check-inline" *ngFor = "let province of utilities.Provinces; let i of index">    
           <label class="form-check-label" for="inlineCheckbox1" ></label>
           <input class="form-check-input" [formControl]= "province" (change)="getSelectedProvinces()" type="checkbox" id="inlineCheckbox" value="option1"> 
      </div>
 </div>     

In .ts I have the following

import { Component, OnInit } from '@angular/core';
import { UtilitiesService } from '../_services/utilities.service';
import { Utilities } from '../models/utilities';
import { forEach } from '@angular/router/src/utils/collection';

@Component({
selector: 'app-filtering',
templateUrl: './filtering.component.html',
styleUrls: ['./filtering.component.css']
})
export class FilteringComponent implements OnInit {
   utilities: Utilities;
   provinces:  string[] = [];
   selectedProvinces: string[] = [];
   selectedCategories: string[] = [];

   constructor(private utilityService: UtilitiesService) { }

   ngOnInit() {
     this.loadUtilities();
  }

  loadUtilities() {
    this.utilityService.getJSON().subscribe((utilities: Utilities) => {
    this.utilities = utilities;
    });

    for (const  province of this.utilities.Provinces) {
      this.provinces.push(province);
    }
  }

  getSelectedProvinces() {
      this.selectedProvinces = [];
      this.utilities.Provinces.forEach((_province, i) => {
          if (_province.value) {
          this.selectedProvinces.push(this.provinces[i]);
      }
  });
 console.log(this.selectedProvinces);
}

}

In my utilities.ts I have the following:

export interface Utilities {
  Provinces: Array<string>;
}

My service is written as follows:

import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { Utilities } from '../models/utilities';
import { Observable } from 'rxjs';

@Injectable({
  providedIn: 'root'
})
export class UtilitiesService {

constructor(private http: HttpClient) {}

public getJSON(): Observable<Utilities> {
   return this.http.get<Utilities>('./assets/utilities.json');
}

}

The Json that is has the following content:

{
   "Provinces":["East","North West","North"]
}

When I try that, I have the following error:

TypeError: Cannot read property 'Provinces' of undefined.

The thing is, when I remove [formControl]= "province" (change)="getSelectedProvinces()", at least I am able to display the provinces on my page.

How can I go about this?